SECTION A.] NORTH AMERICAN CONCHOLOGY. 623 



No. 





No. 





85 



Piano rbis exacutus Say. 





U. ellipticus Barnes. 





Paludina hyalina Lea. 





venustus? Lea. 



86 



lentus Say. 



107 



Unio cylindricus Say. 



87 



parvus Say. 





U. solenoides Raf. 



88 



trivolvia Say. 





naviformis Lam. 



89 



Pupa albilabris Ward. 



108 



cyphius Raf 





Cyclostoma marginata 





U. sesopus Green. 



90 



armifera Say. [Say. 



109 



dilatatus Raf 



91 



contracta Say. 





U. gihhosus Barnes. 



92 



corticaria Say. 





nasutus Lam. 



93 



exigua Say. 





arctior Lea. 



94 



modesta Say.- 



110 



flavus Raf 



95 



Succinea campertris Say. 





U. Tuhiginosiis Lea. 





S. retusa Lea. 





trigonus Lea. 



96 



avara Say. 



111 



fasciolus Raf. 



97 



ovalis Say. 





U. multiradiatus Lea. 



98 



Valvata sine era Say. 



112 



fasciolaris Raf 



99 



tricarinata Say. 





U. phaseoius Hild. 





V. hicurinata Lea. 





planulatus Lea. 



100 



XJnio alasmodontinus jBarn. 





camelus Lea. 





U. compressus Lea. 



113 



flexuosus Raf 



101 



alatus Say. 





U. foUatus Hild. 





U. merjapterus Raf. 



114 



fragilis Raf 



102 



bullatus Raf. 





U. gracilis Barnes. 





U. prasinus Conr. 



115 



fragosus Conr. 





Schoolcraftensis Lea. 



116 



gibbosus Raf. 





pustulosus Lea. 





U. torulosus Raf. 





Dorfeuill anus Lea. 





perplexus Lea. 



103 



cardium Raf. 





Rangianus Lea. 





U. ventricosus Barnes. 





capsaformis Lea. 





occidens Lea. 



117 



heroB Siiy' 





sul)-ovaius Lea. 





U. undidatus Say. 





dolabroeformis Lea. 





multiplicatus Lea. 



104 



cicatricosus Say. 



118 



lapillus Say. 





U. varicosus Lea. 





v. fabalis Lea. 



105 



cuneatuB Raf 





Troostensis Lea. 





U. modioliformis Say. 



119 



leptodon Ruf 





scalenius Raf. 





U. planus Barnes. 





patulus Lea. 





velum Say. 





decisusl Lea. 





pnrpurascens Swains 



106 



crassus Say. 





tenuisslmiis Lea. 





U. elllpsarius Raf. 



120 



llneolatua Raf. 





fasciatus Raf. 

 liaamentina Lam. 





U. depressus Raf. 

 securis Lea. 



carinatus Barnes. 



