NORTH AMERICAN CONCHOLOGY. 



159 



Page. 



244 Physa ancillaria Say. 



244 Limnea jugularis Say, 



244 caperata Say. 



244 humilis Say. 



244 catascopium S. (notes). 



244 desidiosa Say. 



244 lanceata Gould (n. sp.. 



pi. vii,fig. 8, 9). 



245 Planorbis bicarinatus Say. 

 245 parvus Say. 



245 Valvata tricarinata Say. 



245 Amnicola grana Say. 



245 Paludina ponderosa Say. 



245 Melania livescens Menhe. 

 21. Niagarensis Lea. 

 245 subulata. 



245 Cyclas similis Say. 

 245 partumeia Say'? 



245 Pisidium dubium S. (notes). 



245 Unio radiatus Gmel. 



245 Anodonta Pepiniana Lea. 



Agassiz. — On the Embryology of Ascidia and the Character- 

 istics of ^evy Species from the Shores of Massachusetts : by 

 Prof. Louis Agassiz. (Proe. American Assoc, for Advance- 

 ment of Science, vol. ii, p. 157, 1850.) 



159 Ascidia amphora Ag. 

 159 psammophora Ay. 



159 ocellata Ag. 



159 carnea Ag. 



Page. 



159 Ascidia hirsuta Ag. 



159 rugosa Ag. 



159 Boltenia microcosmus Ag. 



^Veivberry. — Geographical Distribution of certain Species of 

 Fluviatile and Terrestrial Shells: by J. S. Newberry, M. D. 

 (Proc. American Assoc, for Advancement of Science, vol. v, p. 

 105, 1851.) 



Page. 



>';imc. 



Locality. 





105 



Limnea gracilis. 



Congress Lake, 



Ohio 



105 



jugularis. 



Congress Lake, 



Ohio 



105 



Melania gracilis. 



Congress Lake, 



Ohio 



105 



Ancylus fuscus. 



Congress Lake, 



Ohio 



105 



Helix diodonta. 



Congress Lake, 



Ohio 



105 



multilineata. 



Congress Lake, 



Ohio 



