Hanna, G. D. 



1939. Exotic Mollu sea in California Bull , Dept . Agr . , Sta . 

 Calif, 28: 298-321. 



Haskin s H. H. 



1935. Investigations on the boring and reproduction activities 

 of oyster drills Urosalpinx cinerea Say and Eupleura sp . 

 Unpub. Rept. U. S. Bur. Fish., Washington, D. C. 



1937. Studies on the movements of the common oyster drill, 



Urosa lp inx cinerea (Say). Unpub. Rept , N. J. Oyster Res. Lab 



1940. The role of chemotropism in food selection by the oyster 

 drill, Urosalpinx cinerea Say- Anat. Rec . 78: 95 (abstract). 



1950. The selection of food by the common oyster drill, Urosalpinx 

 cinerea Say . Proc . Nat. Shellf. Assoc. 1950: 62-68. 



Hedgpeth, J. W. 



1953 . An introduction to the zoogeography of the Northwestern 

 Gulf of Mexico with reference to the invertebrate fauna . 

 Publ, Inst, Mar. Sci 3: 108-224. 



Henderson, J. B., and P. Bartsch. 



1915. Littoral marine mollusks of Chincoteague Island, Va. 

 Proc U. S. Nat, Mus. 47: 411-421. 



Henry, G. E. 



1954. Ultrasonics. Sci. Amer. 190(5): 54-63 . 



Higgins, E. 



1940. Progress in biological inquiries, 1939, Admin. Rept 39, 

 App. I, Rept. U.S. Comm. Fish. 1940: 1-96. 



Ingalls, R. A., and A. W H. Needier. 



1942. Survey of the shore mollusc resources of the Northumberland 

 Strait Coast of Nova Scotia Progr Repts . Atlantic Coast 

 Stas. No 32, Atlantic Biol. Sta. Note No 87: 8-10. 



Ingersoll E. 



1881 . A report of the oyster industry of the United States . Sec . 



X, Monogr. B, Dept. Int., 10th Census U. S., Washington, D.C. 



140 



