"Ventral view of Limulus polyphemus. 1 to 6, The six prosomatic pairs of appendages. abd, the solid…
"Liphistius desultor. Under side of the uplifted genital or first opisthosomatic somite of the female;…
"Pierygotus osiliensis, Schmidt. Silurian of Rootzkil. Restoration of the ventral surface, about a third…