56 



BIBLIOGRAPHY OP 



Page. >"o. 



Planorbis — 

 174 143 exacuous Say. 

 174 144 lens Lea. 

 174 *145 parvus Say. 

 174 146 trivolvis Say. 

 174 147 Physa elliptica Lea. 

 174 *148 elongata Say. 

 174 149 heterostropha Say. 

 174 *150 Sayii Tappan. 



Lymneus — 

 174 *151 catascoplus 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 MelaniacaniculataSa^. 

 174 159 conica Say. 

 174 160 depygis Say. 

 174 *161 isogonica Say. 

 174 162 Sayii Wood. 

 174 *163 Anculosa praerosa Say. 

 174 *164 Valvata sincera Say. 

 174 *165 tricarinata Say. 

 174 166 Paludina decisa Say 



174 *167 granosa Say. 



175 *168 heterostropha Kirtl. 

 175 *K>9 microstoma Kirtl. 

 200 170 ponderosa Say. 



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

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

 descriptions.] 



MOLLUSCA. 



Class CONCHIFERA. 

 Section Lamellipoda. 



Page. t Page. 



13 Cyclas similis Say. \ 13 Cyclas dubiosa Say. 



WATER BIVALVES. 



TJnio Hildrethianus Lea. 



siliquoideus Barnes. 



nasutus Say. 



rectus Lam. 



dilatatus Raf. 



tuberculatus Raf. 



bullatus Raf. 



olivarius Raf. 



rubiginosus Lea. 



gibbosus Raf. 



ventricosus Barnes. 

 Anodonta FerussacianaLea. 



cataracta Say. 

 Alasmodontamarginata Say. 



undulata Say. 



edentula Say. 



