LIST OF ILLUSTRATIONS. 



PLATES. 



Page. 



1. New mollusks from Trinidad, California 6 



2. Hymenoepivieds wiltii, female; 2. Polysphinda tcxana, female 48 



3. Vertebrate fossils from the Pleistocene of Maryland and Tennessee 146 



4. Vertebrate fossils from the Pleistocene of Maryland and Tennessee 146 



5. Vertebrate fossils from the Pleistocene of Illinois and Texas 146 



6. Vertebrate fossils from the Pleistocene of Illinois and Oklahoma 146 



7. Vertebrate fossils from the Pleistocene of Oklahoma • 146 



8. Vertebrate of Symhos promptus? 146 



9. Vertebrate fossils from the Pleistocene of Texas 146 



10. Vertebrate fossils from the Pleistocene of Texas 146 



11. Teeth of Elcphas primigenius from Pleistocene of Texas 146 



12-13. West American mollusks 176 



14-15. Skulls of Peruvian mammals 250 



16. New cephalopods from the western Atlantic 300 



17. New fresh-water shells from Guatemala 302 



18. Crystals of scheelite and cinnabar 306 



19. Vesuvianite from eastern Siberia 306 



20. Achtaragdite from eastern Siberia and crystals of zincite 306 



21. (1) EpUaltes (ItopJectis) conquisitor; (2) Apechthis piciicomis (Cresson) 362 



22-24. The Esther^dlle, Iowa, meteorite 370 



25. West Indian tertiary decapods 384 



26. The venation of local genera of crane-flies 436 



27. Pandosentis iracundus, a new species of Acanthocephalous worms 466 



28. Quadrigyrus torquatus, a new species of Acanthocephalous worms 466 



29. Nematodirus furcatus and N. spathiger 588 



30. Nematodirus spathiger 588 



31. Nematodirus filicollis, N. furcatus, and N. helvetianus 588 



32. Nematodirus spathiger, N. dromedarii, and N. abormalis 588 



■33. Nematodirus filicollis and N. spathiger 588 



34. Nematodirus spathiger, N. furcatus, and N. abnormaJis 588 



35. Nematodirus helvetianus and N. dromedarii 588 



TEXT FIGURES. 



Hymenoepimecis wiltii. a, dorsal view of head ; b, clypeus and mandibles 16 



Polysphincta burgessi. a, dorsal view of head; b, Polysphinda (Zalypota) 



braucheri. Clypeus and mandibles 16 



Colpomeria mellithorax. a, Lateral view of prescutum showing cristulae; b, C. 



kincaidii. Front femur and tibia of female 17 



Zabrachypus primus, a, hind tarsus of female; b, areolet 17 



Polysphincta texana. Female 22 



Floor of Bulverde cave ■'^29 



Section of the cave along the line C/-D of Fig. 1 130 



A section of the cave along the line A-B of Fig. 1 131 



VII 



