LIST OF ILLUSTRATIONS. 



PLATES. 



Facinjr p 



1. Diploma of honorary citizenship of St. Petersburg ](i 



2. Malachite casket for diploma of honorary citizenship of St. Petersburg... 16 



3. Diploma of honorary citizenship of Moscow 16 



4. Portfolio for diploma of honorary citizenship of Moscow Hi 



5. Memorial from Cherepovetz 1 (i 



6. Portfolio with the arms of Kronstadt 16 



7. Commemoration medals: obverse 16 



8. Commemoration medals: reverse J 6 



9. Representative specimens of sand-barite from Kharga, Egypt 24 



10. Compsemys and Basilemys 326 



11. Compsemys, Adocus, and Aspideretes 326 



12. Hoplochelys bicarinata 326 



13. North American species of Pero :;7s 



14. Generic characters of Pero 378 



15. Genitalia of Pero :;> 



16. Genitalia of Pero :'>7^ 



17. Vormela negans, type. Ordos Desert. Vormela peregusna. Dobrudscha 386 



18. Chilophylla hirsuta. Noseleaf greatly enlarged mi 



19. Epimys tyrannus, type. (Natural size) 404 



20. Batomys dentatus, type. (Natural size) Mil 



21. A new Labradorean species of Onckidiopsis 484 



22. A new Labradorean species of Onckidiopsis 484 



23. Skull of Li idyosuchus sternbergii 502 



24. Skull of Leidyosuehus stt rnbergii 502 



25. Skull and jaws of L< idyosuchus sternfo rgii . r >(>2 



26. Skull of Li idyosuchus sti rnbergii 502 



27. Lower jaw of Leidyosuehus sb rnbergii 502 



28. Skull of Leidyosuehus sti rnbergii 502 



29. Skull of Leidyosuehus sternbergii 502 



30. Salvelinus stagnalis 510 



3 1 . Thalassophryne dowi 526 



:$2. Fig. 1. — Thalassophryne punctata. Fig. 2. -Thalassophrym maculosa, 



cotype of T. nattereri. Fig. :'>. -Opercular spine of Thalassophrym dowi. 



Fig. 4. — Opercular spine of Ponchthys greenei 526 



33. Thalassophrym maculosa 526 



3 1. Thalassophryne r< ticulata 526 



35. Trichostibas isthmiella 530 



36. Fig. 1. — Inachoides microrhynehus. Fig. 2. Epialtus marginatus 620 



.47. Fig. 1. — Hepatus chilensis. Fig. 2. Arenseus mexicanus 620 



38. Fig. 1. — Cancer plebejus. Fig. 2. Cancer polyodon 620 



39. Fig. 1. — Xantho gaudichaudii. Fig. 2. Platyxanthus crenulatus 620 



40. Fig. 1. — Cycloxanthops sexdecimdentatus. 1' i lt . 2. Platyxanthus orbignyi — 620 



41. Fig. 1. — Eriphia squamata. Fig. 2. — Panopms purpiireus. Fig. 3. 



/\ trolisthes armatus. Fig. 4. — Panopt us chih nsis 620 



XI 



