"Diagram of the heart and branchial arches in the Frog. c.g., carotid gland; l., lungs; l.a., left auricle;…
"Diagram of the heart and branchial arches in a Reptile...a, aorta; au., auricle; c, carotid; c.v.,…
"Diagram of the heart and the branchial arches in Mammals. A dotted outline of the arches of the Fish…
"Diagram of head and brain of human foetus six weeks old (heavy boundaries). The dotted line indicates…
"Diagram of a cross-section of the spinal cord through the roots of spinal nerves. c, central canal;…
"Diagram of the principal vessels in the circulation of a Fish, lateral view. a, aorta; au., auricle;…
"Diagram of the female genital organs of a Bird. c, cloaca; i, intestine; k, kidney; o, ovary with ova…
"Diagram of the urino-genital organs of a male Bird. ad., adrenal body; c, cloaca; i, intestine; k,…
"General view of the viscera of a male frog, from the right side. a, stomach; b, urinary bladder; c,…
"Transverse section through the wall of a cylinder (parallel with the course of the canals), showing…
"Vertical section of a fresh-water sponge (Spongilla), showing the arrangement of the canal-system.…
"Ambulacral system of a starfish. a, ampullae; ap, Polian vesicles; c, circular canal; m, madreporite;…
"Transverse section of thorax of crayfish, diagrammatic. abm, ventral abdominal muscles; bf, leg; bm,…
"Nervous system of Astacus fluviatilis. bg, sub-oesphageal ganglion; cs, commissural ganglion; g, brain;…
"Three stages in the development of Apus. fs, frontal sensory organ; L, digestive gland; s, carapace;…
"Periplaneta. General view of the nervous system. abd. 6, sixth abdominal ganglion; ant, antennary nerve;…
"Patella vulgata, seen from the ventral side. f, foot; g.l, circlet of gill lamellae; m. e, edge of…
"Sepia officinalis, enteric canal. a, anus; b. d, one of the bile ducts; b. m, buccal mass; c, caecum;…
"Oral surface of a male (A) and female (B) Nautilus pompilius in an expanded state. a, shell; b, external…
"Amphioxus lanceolatus. A, transverse section of the pharyngeal region. a, dorsal aorta; b, atrium;…
"Lacerta agilis. General view of the viscera in their naturaal relations. Bl, urinary bladder; Ci, post-caval…
"Diagrammatic horizontal section of the eye of man. c, cornea; ch. choroid (dotted); C. P, ciliary processes;…
The dissection of a female sea lamprey or Petromyzon marinus. ad, anterior dorsal cartilage; an, annular…
"Salmo fario, the entire skull, from the left side. art, articular; branchiost, branchiostegal rays;…
"Rana esculenta. The shoulder girdle from the ventral aspect. Co, coracoid; Co', epicoracoid; Cl, clavicle;…
"Rana esculenta. Pelvic girdle from the right side. G, acetabulum; Il, P, ilium; Is, ischium; Kn, pubis."…
"Rana esculenta. The brain. A, from above; B, from below. ch. opt, optic chiasma; HH, cerebellum; Hyp,…
"Rana esculenta. Urinogenital organs of the male. Ao, dorsal aorta; Cl, cloaca; Cv, post-caval vein;…
"Rana esculenta. Urinogenital organs of the female. N, kidneys; Od, oviduct; Ot, its coelomic aperture;…
"Skeleton of crocodile. C, causal region; D, thoracic region of spinal column; F, fibula; Fe, femur;…
"Cistudo lutaria. Skeleton seen from below; the plastron has been removed and is represented on one…
"Chelone midas. Transverse section of skeleton. C, costal plate; C', centrum; M, marginal plate; P,…
"A, lateral view of skull of rattlesnake (Crotalus). B. O, basi-occipital; B. S, basi-sphenoid; E. O,…
"Heart of monitor (Varanus) dissected to show the cavity of the ventricle and the vessels leading out…
"Brain of alligator, from above. B. ol., olfactory bulb; G. p, epiphysis; HH, cerebellum; Med, spinal…
"Poison apparatus of rattlesnake. A, eye; Gc, poison-duct entering the poison-fang at +; Km, muscles…
"Pterylosis of Columba livia. A, ventral; B, dorsal. al. pt, alar pteryla or wing-tract; c. pt, cephalic…
"Columba livia. Sacrum of a nestling (about fourteen days old), ventral aspect. c1, centrum of first…
"Columba livia. Skull of young specimen. A, dorsal; B, ventral; C, left side. al. s, alisphenoid; au,…
"Columba livia. Left manus of a nestling. The cartilaginous parts are dotted. cp. 1, radiale; cp. 2,…
"Columba livia. Left innominate of a nestling. The cartilage is dotted. ac, acetabulum; a. tr, anti-trochanter;…
"Columba livia. Part of left foot of an unhatched embryo. The cartilage is dotted. mtl. 2, second; mtl.…
"A, heart of the pigeon, dorsal aspect. a. ao, arch of aorta; br. a, brachial artery; br. v, bachial…
"Columba livia. The brain; A, from above; B, from below; C, from the left side. cb, cerebellum; c. h,…
"Columba livia. Male urino-genital organs. adr, adrenal; cl. 2, urodaeum; cl. 3, proctodaeum; k, kidney;…
"Columba livia. Female urino-genital organs. cl. 2, urodaeum; cl. 3, proctodaeum; k, kidney; l. od,…
"Lepus cuniculus. Shoulder-girdle with anterior end of sternum of young specimen. a, acromion; af, pre-scapular…
"Lepus cuniculus. Brain. A, dorsal view; B, ventral; b. o, olfactory lobe; cb', median lobe of cerebellum…
"Lepus cuniculus. Longitudinal vertical sectioin of the brain. cb, cerebellum, showing arbor vitae;…
"Lepus cuniculus. The urogenital organs. A, of male; B, of female, from the left side. The kidneys and…
"Lepus cuniculus. The anterior end of the vagina, with the right uterus. Fallopian tube, and ovary.…
in early development of race, the Mongolian type consistent of Kalmucks, Chinese, and Amerindians.
in early development of race, the Caucasian type consisted of Mediterranean men (Jews of Algiers), Mediterranean…
Early developments of racial types, a tomb paint from an Egyptian tomb.
Perhaps the earliest people to form real cities in the western region of the world, were a people of…
"A, right hind leg of a honey-bee (seen fron behind and within); B, the tibia. ti, seen from the outside,…
Singular warfare of the American Indians. Caption below illustration: "I no longer hesitated; I took…