186 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



Subfamily HEMIPLECTIN^. 

 Genus Hemiplecta, Albers, 

 (LomastomcB.) 



jpernobilis, Fer, 

 (AplostomcB : Fasciatce.) 

 rajoa, Miiller. 

 clairvillia, Fer. [i.e. clairvillei.]. 



Genus Rhysota, Albers. 



{AplostomcB : Fasciatce.) 



huphthalmus, Fer. [= stolephora, Val.]. 



Family TROCHOMORPHID^. 



Genus Trochomorpha, Albers. 

 (Heliomanes.) 

 exclusa, Fer. 

 trochiformis, Fer, 



Family ENDODONTID.^. 



Genus Punctum, Morse. 



{AplostomcB : Verticilli.) 

 pygmcea, Drap. 



Genus Patula, Held. 



{AplostomcB : Verticilli.) 

 alternala, Say. 



Genus Helicodisgus, Morse. 



{AplostomcB :. Verticilli.) 



lineata, Say [= parallelus, Say]. 



Genus Goniodiscus, Fitzinger (em.). 

 {AplostomcB : Verticilli.) 

 rotundata, Miiller. 

 ruderata, Studer. 

 perspectiva, Say. 

 convexa, Fer. [= frivaldskyana, Rm.]. 



Family HELICID^. 

 Subfamily POLY G Y BIN M. 

 Genus Polygyra, Say, 



Subgenus Triodopsis, Rafinesque. 

 {LomastorncB.) 



richardi, Fer. \=^ profunda, Say]. 



Genus Poly^gy^ratia, Gray. 

 {LornastomcB.) 



polygyrata, Born. 



