ILLUSTRATIONS XI 



Facing page 



12. a, Excavation of House Ring No. 1; b, partially excavated trenches in 



House Ring No. 1 22 



13. a, Row of post holes of inner square at center of House Ring No. 1; 



b, post holes at bottom of trench in House Ring No. 2 22 



Two New Species of Nematode Worms of the Genus Oster- 



TAGIA FROM THE VIRGINIA DeER, WITH A NOTE ON OSTERTAGIA 

 LYRATA 



Bj' G. Dikmans 



1 . Ostertagia odocoilei 6 



2. Ostertagia mossi 6 



Two New Lungworms from North American Ruminants and 

 A Note on the Lungworms of Sheep in the United States 



By G. Dikmans 



1. Protostrongylus stilesi 4 



2. Protostrongylus macrotis 4 



A New Nematode Worm, Viannaia bursobscura, from the 

 Opossum, with a Note on Other Parasites op the Opossum 



By G. Dikmans 



1. Viannaia bursobscura 4 



2. Viannaia bursobscura and Gnathostoma turgidum 4 



Report on Birds Recorded by the Pinchot Expedition of 

 1929 TO THE Caribbean and Pacific 



By Albert K. Fisher and Alexander Wetmore 



1. Swan Island, Caribbean Sea. Typical scrub on Little Swan Island. _ 2 



2. Coconut grove, Swan Island. Old Providence Island, Caribbean 



Sea 3 



3. Cocos Island. Chatham Bay, Cocos Island 24 



4. The Mary Pinchot at anchor, Barrington Island, Galapagos Group. 



Settlement at Wreck Bay, Chatham Island, Galapagos Group 25 



5. Seymour Island, Galapagos Group, Daphne Island showing in the 



distance. Indefatigable Island, Galapagos Group 28 



6. Man-o'-war bird. Tower Island, Galapagos Group. Galapagos alba- 



trosses, Hood Island 29 



7. Indefatigable Island, Galapagos Group. Galapagos hawk at nest, 



Seymour Island 36 



8. The Mary Pinchot in harbor. Bay of Virgins, Fatuhiva, Marquesas 



Islands. Fatuhiva Island, Marquesas Islands 37 



9. Coconut grove, Hivaoa Island, Marquesas Islands. Hivaoa Island, 



Marquesas Islands 56 



10. A lowland stream on Hivaoa Island, Marquesas Islands. Toau, 



Tuamotu Islands 57 



A New Species of Troodont Dinosaur from the Lance Forma- 

 tion OP Wyoming 



By Charles W. Gilmore 



1. Troodon skulls 6 



2-3. Skull of Troodon wyomingensis 6 



4-5. Troodon bones 6 



