56 



BIBLIOGRAPHY OP 



Page. No. 



Planorbis — 

 174 143 exacuous Say. 

 174 144 lens Lea. 

 174 *145 parvus Say. 

 174 146 trivolvis Say. 

 174 347 Physa elliptica Lea. 

 174 *148 elongata Say. 

 174 149 heterostropha Say. 

 174 *150 Sayii Tappan. 



Lymneus — • 

 174 *151 catascopius Say. 

 174 152 decidiosus Say. 

 174 153 elodes Say. 

 174 154 exilis Lea. 

 174 155 reflexus Say. 

 174 *156 stagnalis Lam. 



Page. No. 



Lymneus — 

 174 157 umbrosus Say. 

 174 158 Melaniacaniculata/Sa^. 

 174 159 conica Say. 

 174 160 depygis Say. 

 174 *161 isogonica Say. 

 174 162 Sayii Wood. 

 174 *163 Anculosa praerosa (Sa^. 

 174 *164 Valvata sincera Say. 

 174 *165 tricarinata Say. 

 174 166 Paludina decisa Say 



174 *167 granosa Say. 



175 *168 heterostropha ZiV^Z. 

 175 *169 microstoma Kirtl. 

 200 170 ponderosa Say. 



iSag'er. — Report of Dr. Abm. Sager, Zoologist of the Geologi- 

 cal Survey [of Michigan]. Detroit, Jan. 12, 1839. [Without 

 descriptions.] 



MOLLUSCA. 



Class COIVCHIFERA. 



Section Laiuellipoda. 



1 Page. 



13 Cyclas similis Say. 



13 Cyclas dubiosa Say. 





NAIADAE. FRESH 



WATER BIVALVES. 



13 



Unio plicatus Say. 



13 



Unio Hildrethianus Lea. 



13 



alatus Say. 



13 



siliquoideus Barnes. 



13 



purpureus Say. 



13 



nasutus Say. 



13 



fasciolaris Raf. 



13 



rectus Lam. 



13 



undulatus Barnes. 



13 



dilatatus Raf. 



13 



multiradiatus Lea. 



13 



tuberculatus Raf. 



13 



circulus Lea. 



13 



bullatus Raf. 



13 



penitus Conr. 



13 



olivarius Raf. 



13 



lapillus Say. 



13 



rubiginosus Lea. 



13 



compressus Lea. 



13 



gibbosus Raf 



13 



triangularis Barnes. 



13 



ventricosus Barnes. 



13 



cariosus Say. 



13 



Anodonta Ferussacianaiea. 



13 



fragilis Raf. 



13 



cataracta Say. 



13 



subrotundus Lea. 



13 



Alasmodontamarginata Say. 



13 



coelatus Conr. 



13 



undulata Say. 



13 



iris Lea. 



13 



edentula Say. 



