UST OF ILLUSTEATIONS XIH 



New species of mollusks of the qbntts Chilina 



By William B. Marshall „ . 



■' Facing page 



1. New mollusks of the genus Chilina 6 



New mollxtsks from Santa Elena Bay, Ecuador 

 By Paul Bartsch 

 1-2. New mollusks from Ecuador -- 10 



New Uruguayan mollusks of the genus Corbicula 

 By William B. Marshall 

 1-2. New Uruguayan Corbiculidae 12 



Some parasitic rounds worms of the rabbit with descriptions 



OF TWO NEW species 



By Asa C. Chandler 



1. Trichostrongylus calcaratus and Nematodirus leporis 6 



2. Obeliscus cuniculi »_ 6 



Illustrations of unfigured types of shells in the collection 

 OF THE United States National Museum 



By WiUiam Healey Dall 



1-11. Illustrations of types 42 



12. Sanguinolaria orcuUi Dall 42 



13. Illustrations of types 42 



14. Chrysodomus eulimatus Dall 42 



15-16. Acmaea digitalis Eschscholtz 42 



17-36. Illustrations of types 42 



Plant and insect fossils prom the Green River Eocene of 

 Colorado 



By T. D. A. Cockerell 



1-2. Fossils from the Green River Eocene 14 



A RARE Cretaceous sea urchin Scutellaster cretaceus Cragin 



By John B, Reeside, jr. 



1. Scutellaster cretaceus Cragin 4 



A Pleistocene flora from the island op Trinidad 



By Edward W. Berry 



1-4. Pleistocene flora from the island of Trinidad 10 



Miocene gastropods and scaphopods from Trinidad, British West 



Indies 



By Wendell C. Mansfield 



1-6. Miocene gastropods from Trinidad 1 66 



7. Miocene gastropods and scaphopods from Trinidad 66 



8-10. Miocene gastropods from Trinidad 66 



