LIST OF ILLUSTRATIONS. 



PLATES. Facing 



page. 



1. Female of Penicultis clavatus 150 



2. Female of Peniculus fissipes 150 



3. Female of Cardiodectes medusaeus 150 



4. Female of Lemaeenictis radiatus 150 



5. Females of Lernaeenicus radiatus and L. polyceraus 150 



6. Female of Lernaeenicus affinis 150 



7. Female of Lernaeenicus longiventris 150 



8. Female of Sarcotretes lohatus 150 



9. Female of Phrixocephalus triangulus 150 



10. Phrixocephalus triangulus, P. diversus, and Lemaeocera branchialis 150 



11. Female of Collipravus parvus 150 



12. Female and nauplius of Lemaeocera branchialis 150 



13. Female of Lemaeolophus sultanus '. 150 



14. Female of Haemohaphes cyclopterina 150 



15. Females of Penella antarctica and P. filosa 150 



16. Female of Pennella filosa 150 



17. Females of Pennella filosa and Lemaeocera branchialis 150 



18. Female of Pennella instructa 150 



19. Female of Eaemobaphes diceraus 150 



20. Females of Haemohaphes diceraus, H. enodis, and Trifur tortuosus 150 



21. Females of Trifur tortuosus and Cardiodectes hellottii 150 



22. Skull of wild-killed adult male Felis leo massaica 194 



23. Skull of park-reared adult male Felis leo massaica 194 



24. Skulls of park -reared (upper) and wild-killed (lower) lionesses 194 



25. Skulls of wild-killed (upper) and park-reared (lower) lions 194 



26. Gomphotherium elegans 222 



27. Gomphus parvidens and G. brevis 226 



28. Gomphus parvidens, G. abbreviatus, G. viridifrons, and G. brevis 226 



29-31. Silicified wood containing calcite 230 



32. Philopterus ambiguus Giebel, an asymmetrical bird-louse 232 



33. A new bear-animalcule from North America 254 



34-49. West American Melanellid moUusks 356 



50-55. South American Diplodons 388 



56. Skull and lower of teeth Equus lambei 444 



57. Skull and teeth of Equus lambei 444 



58. Skull and teeth of Equus lambei 444 



59. A new fossil crab from the California Pliocene 452 



60. Impression of fossil bird from Colorado 456 



61. Impression of fossil bird from Colorado, with bones of lower limb outlined 



in ink 456 



62. Dorsal and ventral views of Clypeaster lanceolatus 602 



63. Dorsal view of Clypeaster gatuni 602 



IX 



