LIMNAEACEA. &4S 



Sub-Genus PLANORBULA. Hald. (type P. armigenis, 



Say). 



18. Planorbis (Planorbula) armigems, Say- 

 as Michigan and New York ; ex c. Prof. W. Ncwcomb, Hev. E. R, 



Beadle, <^c. 



5 Prince Edward's I. ; coll. A. Nevill, Esq. 



Sub-Genus ANISUS, Fitz. (type P. carinatus, Miill.). 



{Fide Carus and Gerst. = Tropidiscus, Stein, and 

 Gyrorbis, Moq. T.) 



19. Planorbis (Anisus) vortex, Linn. 



6 Eng-land ; coll. G. Nevill, Esq., and ex c. As. See, Bengal. 

 11 Potsdam ; ex c. Dr. Ed. von Martens. 



20. Planorbis (Anisus) kermatoides, Orb. 



6 Peru ; coll. A. Morelet, Esq. 



21. Planorbis (Anisus) marginatus, Drap, 



2 Neufchatel ; ex c. As. Soc, Bengal. 



3 England ; coll. G. Nevill, Esq. 



22. Planorbis (Anisus) subangulatus (?), Phil. 



var. 



40 Asupas, Persia ; coll. W. T, Blanford, Esq. 



var. ( ? n. species). 



6 Tangitan ; coll. Dr. F. Stoliczka. 



23. Planorbis (Anisus) carinatus, Miill 



7 Austria; ex c. Dr. F. Stoliczka. 

 2 Ireland ; coll. Dr. T. Oldham. 



4 Potsdam J coll. Dr. Ed. von Martens. 



Sub-Genus NAUTILINA, Stein. 

 (Fide Carus and Gerst. = Gijrauhis, Agassiz and Binn.) 



24. Planorbis (Nautilina) santacruzensis (?). 



20 St. Croix ; ex c. Prof. W. Newcomb (?) 



25. Planorbis (Nautilina) parvus, Say. 



40 New York ; ex c. Prof. W, Newcomb and W, A. Brown, Esq, 



