42 



BIBLIOGRAPHY OF 



Order IV. Cephalopoda. 



Page. Naiae. Locality. 



22 Spirula Peronii. Found on the ocean shore of Nan- 



Nautihis spirula L. tucket. 



£lcl.rle. — List of Land and Fresh-water Shells in Massachusetts 

 so far as they have been ascertained: by Mr. John Milton 

 Earle, of Worcester. (Yide p. 39.) 



I. BIVALVES. 



Page. K'amp. 



22 Unio complanatus Lam. 



U, jnirpurcus Say. 

 22 nasutus Saij. 



22 ochraceus San. 



22 radiatus Say. 



22 Alasmodonta margaritifera L 



A. arcuata Barnes. 

 22 marginata Sai/. 



22 undulata Sat/. 



22 Anodonta cataracta Say. 

 22 marginata Say. 



22 lugubris Say. 



22 Cyclas similis Say. 



23 dubia Say. 

 And two species not described. 



Locality. 



Ponds in Essex & Plymouth Cos. 

 Ponds in Plymouth County. 

 Ponds in Plymouth & Essex Cos. 



Blackstone river. 



Do. and streams in Plym. Co. 



Blackstone and French rivers. 

 Ponds in Essex County. 



II. UNIVALVES. 



Page. 



23 Paludina decisa Say. 



23 liniosa? Say. 



23 Planorbis trivolvis Say. 



23 bicarinatus Say. 



23 armigerus Say. 



23 campanulatus. 



Page. 



23 Planorbis parvus Say. 



23 Lymneea catasc opium Say. 



23 heterostropha Say. 



23 columella Say. 



And one species not ascertained. 

 23 Valvata arenifera? Lea. 



LAND SHELLS. 



23 Helix albolabris. 



23 arboreus Say. 



23 tridentata Say. 



23 alternata Say. 



23 glaphyra Say. 



23 thyroidus Say. 



23 Helix minuta Say. 

 23 hirsuta Say. 



23 labyrinthica Say. 



23 perspectiva Say. 



23 fraterna Say. 



And two other species. 



