218 



BIBLIOGHAPHY OP 



Page. Name. 



86 Trichotropis costellatus Couth. 



87 Buccinum Boysii Nutt. 



88 Poulsoni Nutt. 

 88 serratum Dufr. 



88 trivittatum Say. 



89 Terebra Petitii Kiener. 

 ^'o Cyprssa pustulata Lam. 



97 Oliva biplicata Sowerby. 



98 undatella. 



Locality. 

 Massaclnisetts Inay, 

 Upper California. 

 Upper California. 

 California. 

 New York. 

 Soutti Carolina. 

 Mexico. 

 California. 

 California. 



Pa, 

 112 

 112 

 113 

 114 

 116 



118 



122 



V 



vii 



Fig. 



8,9 



10,11 



17,18 



19,20 



7 



1,2 

 11 



(Appendix. See, also, p. 64.) 



Name. Locality. 



Paludina scalaris Jay. Florida. 



Lymneea gracilis Jay. Essex Co., N. Y. 



Trichotropis costellatus Couth. Mass. bay. 



Nucula Portlandica Hitch., fossil. Maine. 



Ampullaria scalaris D^Orb, Mexico. 



A. ani/ulata Jay. 



Unio spinosus Lea. Georgia. 



Melania laeta Jay. Alabama. 



-Facts and Principles relating to the Origin and Geo- 

 graphical Distribution of Mollusca: by Thos. Bland, F. G. S. 

 London. (From Am. Journal Science and Art, 2d series, vol. 

 xiv, No. 42, pp. 389-404. November, 1852.) 



Lsipliam. — Catalogue of the Mollusca of Wisconsin: by I. A. 

 Lapham. (From Trans. Wise, State Agricultural Soc, vol. ii. 

 Madison, Wise, 1852.) [Without descriptions.] 





Order GASTEI2.0P©I5A. 



Page, 





Page. 





3G7 



Ancylus rivtilaris Say. 



367 



Helix hirsuta Say. 



367 



diaphanus Hald. 



367 



labyrinthica Say. 



367 



Vitrina pellucida Drop, 



367 



lineata Say. 



367 



Helix albolabris Say. 



367 



ligera Say. 



307 



alternata Say. 



367 



monodon Rackett. 



367 



arborea Say. 



367 



multilineata Say. 



367 



chersina Say. 



367 



perspectiva Say. 



367 



concava Say. 



367 



profunda Say. 



367 



fraterna Say. 



367 



porcina Say. 



