NORTH AMERICAN CONCHOLOGY. 



123 



249 xxxiv 325 



Tcredinidae. 



Teredo navalis Linn. 



259 

 259 

 259 

 259 

 259 

 259 

 259 

 259 

 260 



TUNICATA. 



Ascidea Manhattensi3 De Kay. 

 rustica Lam., e. 1. 

 plicata Lesueur, e. 1. 

 ovalis Lesueur, e. 1. 

 lobifera Lesueur, e. 1. 

 proboscidea Lesueur, e. 1. 

 intestinalis [no description]. 



Northern coast. 

 Philadelphia. 

 Philadelphia. 

 Florida. 

 Florida. 

 Northern coast. 

 microcosmus [no description]. Nor. coast. 



xxxiv 324 Boltenia reniformis McLeay. 



Ascidia clavata Mull. ? ™ 



globifera Sahine. 



Troost.— Seventh Annual Report on the Geology of Tennessee: 

 by G. Troost, M. D. 1844. 



LIST OF SHELLS. 



Page. 



40 Unio -ffisopus Green. 



40 alatus Say. 



40 amcenus L,ea. 



40 anodontoides Lea. 



40 arcaeformis Lea. 



40 argenteus Lea. 



40 asperrimus Lea. 



40 Barnesianus Lea. 



40 biangulatus Lea. 



40 Bigbyensis Lea. 



40 brevidens Lea. 



40 capseeformis Lea. 



Page. 



40 TJnio circulus Lea. 



40 caelatus Conr. 



40 clavus Lam. 



40 Conradicus Lea. 



40 Cooperianus Lea. 



40 cornutus Barnes. 



40 crassidens Lam. 



40 crassus Say. 



40 creperus Lea. 



40 Cumberlandicus Lea. 



40 cuneolus Lea. 



40 cylindricus Say. 



