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"Cryptostemma Karschii, one of the Podogona. Dorsal view of male. III to VI, The third, fourth, fifth and sixth appendages of the prosoma. a, Movable (hinged) sclerite (so-called hood) overhanging the first pair of appendages. b, Fused terga of the prosoma followed by the opisthosoma of four visible somites. an, Orifice within which the caudal segments are withdrawn. E, Extremity of the fifth appendage of the male modified to subserve copulation." — The Encyclopedia Britannica, 1910

Cryptostemma Karschii

"Cryptostemma Karschii, one of the Podogona. Dorsal view of male. III to VI, The third, fourth, fifth…

"Cryptostemma Karschii, anterior aspect of the prosoma with the "hood" removed. I to IV, first to fourth appendages of the prosoma; a, basal segment of the second pair of appendages meeting its fellow in the middle line." — The Encyclopedia Britannica, 1910

Cryptostemma Karschii

"Cryptostemma Karschii, anterior aspect of the prosoma with the "hood" removed. I to IV, first to fourth…

"Cryptostemma Karschii, one of the Podogona. Vental view. I to VI, The six pairs of appendages of the prosoma, the last three cut short. 1, 2, 3, 4, The four somites of the opisthosoma. a, Visible hood overhanding the first pair of appendages. b, Position of the genital orifice. c, Part of 3rd appendage. d, Fourth segment of 2nd appendage Observe that the basal segment of appendage III does not meet its fellow in the middle line." — The Encyclopedia Britannica, 1910

Cryptostemma Karschii

"Cryptostemma Karschii, one of the Podogona. Vental view. I to VI, The six pairs of appendages of the…

"Galeodes sp., one of the Solifugae. Ventral view to show legs and somites. I to VI, The six leg-bearing somites of the prosoma. opisth I, First or genital somite of the opisthosoma. ge, Site of the genital aperture. st, Thoracic tracheal aperture. l2, Anterior tracheal aperture of the opisthosoma in somite 2 of the opisthosoma. l3, Tracheal aperture in somite 3 of the opisthosoma. a, Anus." — The Encyclopedia Britannica, 1910

Galeodes

"Galeodes sp., one of the Solifugae. Ventral view to show legs and somites. I to VI, The six leg-bearing…

"Koenenia Mirabilis, Grassi, one of the Palpigradi. A, Ventral view of prosoma and of anterior region of opisthosoma with the appendages cut off near the base; a and b, prosternites; c, mesosternite; and d, metasternite of the prosoma; f, ventral surface of the prae-genital somite; g, sternite of the genital somite (first opisthosomatic somite). B, Dorsal view. I to VI, prosomatic appendages; I, opisth, genital somite (first opisthosomatic somite). C, Lateral view, I to VI, prosomatic appendages; a, b, c, the three tergal plates of the prosoma; prae-gen, the prae-genital somite; 1 to 10, the ten somites of the opisthosoma. D, Chelicera." — The Encyclopedia Britannica, 1910

Koenenia Mirabilis

"Koenenia Mirabilis, Grassi, one of the Palpigradi. A, Ventral view of prosoma and of anterior region…

"Liphistius desultor. Lateral view. I to VI, Appendages of the prosoma cut off at the base. o, Ocular tubercle. praegen, The prae-genital somite. 1 and 2, Sternites of the first and second opisthosomatic somites. 3 and 4, Appendages of the third and fourth opisthosomatic somites, which are the spinning organs, and in this genus occupy their primitive position instead of migrating to the anal region as in other spiders. 5, Tergite of the fifth opisthosomatic somite. II, Eleventh opisthosomatic somite; an, Anus." — The Encyclopedia Britannica, 1910

Liphistius Desultor

"Liphistius desultor. Lateral view. I to VI, Appendages of the prosoma cut off at the base. o, Ocular…

"Schizomus crassicaudaius, one of the Tartarid Pedipalpi. Ventral view of a female with the appendages cut short near the base. a, Prosternum of prosoma. b, Metasternum of prosoma. prae-gen, The prae-genital somite. I opisth, First somite of the opisthosoma. II opisth, Eleventh somite of the opisthosoma. pa, Post-anal lobe of the female." — The Encyclopedia Britannica, 1910

Schizomus

"Schizomus crassicaudaius, one of the Tartarid Pedipalpi. Ventral view of a female with the appendages…

"View from below of a scorpion (Buthus occitanus) opened and dissected so as to show the pericardium with its muscles, the lateral arteries, and the tergo-sternal muscles. PRO, Prosoma. dpm, Dorso-plastral muscle. art, Lateral artery. tsm1, Tergo-sternal muscle of the second (pectiniferous) mesosomatic somite; this is the most anterior pair of the series of six, none are present in the genital somite. tsm4, Tergo-sternal muscle of the fifth mesosomatic somite. tsm6, Tergo-sternal muscle of the enlarged first metasomatic somite. Per, Pericardium. VPM1 to VPM7, The series of seven pairs of veno-pericardiac muscles. There is some reason to admit the existence of another more anterior pair of these muscles in Scorpio; this would make the number exactly correspond with the number in Limulus." — The Encyclopedia Britannica, 1910

Scorpion

"View from below of a scorpion (Buthus occitanus) opened and dissected so as to show the pericardium…

"Stylocellus sumatranus, one of the Opiliones; after Thorell. Enlarged. A, Dorsal view; I to VI, the six prosomatic appendages. B, Ventral view of the prosoma and of the first somite of the opisthosoma, with the appendages I to VI cut off at the base; a, tracheal stigma; mx, maxillary processes of the coxae of the 3rd pair of appendages; g, genital aperture. C, Ventral surface of the prosoma and opisthosoma; a, tracheal stigma; b, last somite. D, Lateral view of the 1st and 2nd pair of apendages. E, Lateral view of the whole body and two 1st appendages, showing the fusion of the dorsal elements of the prosoma into a single plate, and of those of the opisthosoma into an imperfectly segmented plate continuous with that of the prosoma." — The Encyclopedia Britannica, 1910

Stylocellus Sumatranus

"Stylocellus sumatranus, one of the Opiliones; after Thorell. Enlarged. A, Dorsal view; I to VI, the…