ILLUSTKATIONS IX 



Synopsis of the Calanoid Crustaceans, Exclusive of the 

 DiAPTOMiDAE, Found in Fresh and Brackish Waters, Chiefly 

 OF North America 



By C. Dwight Marsh 



Following page 



1. 3. Species of Limnocalanus 58 



2. Limnocalanus macrurus 58 



4, 5. Osphranticum labronedum 58 



6, 8. Species of Eurytemora 58 



7. Eurytemora canadensis 58 



9. Epischura lacitstris 58 



10-12. Species of Epischura 58 



13. Species of Epischura and Limnocalanus 58 



14. Species of Heterocope and Eurytemora 58 



15-19. Species of Pseudodiaptomus 58 



20. Species of Pseudodiaptomus and Schmackeria 58 



21-23. Species of Schmackeria 58 



24. Senecella calanoides 58 



New Fresh- Water Gastropod Mollusks of the Genus Chilina 

 OF South America 



By William B. Marshall 



1. Gastropods of the genus Chilina 6 



New Fossil Fresh- Water Mollusks from Ecuador 



By William B. Marshall and Edgar 0. Bowles 



1 . Fossil mollusks from Ecuador — 7 



Description of a Tick, Dermacentor halli, from the Texas 

 Peccary, with a Key to the North American Species of 

 Dermacentor 



By Allen Mcintosh 



1 . Dermacentor halli 6 



West African Snails of the Family Achatinidae in the 

 United States National Museum 



By Henrj^ A. Pilsbry 



1, 2. West African snails 6 



Camptostroma, a Lower Cambrian Floating Hydrozoan 

 By Rudolf Ruedemann 



1,2. Camptostroma roddyi, new species 8 



3. Camptostroma resseri and C. roddyi, new species 8 



4. Camptostroma roddyi, new species 8 



