16 VALVATIDJJ, 



4. Valvata stoliczkana. 



Valvata stoliczkana, G. Nevill, Moll. Miss. Ydrkand, 1878, figs. 3436, 

 Ydrkand. 



30 Yarkand (type) ; coll. Dr. F. Stoliczka. 



Exceedingly close to V. macrostoma, Stein, possibly only a 

 variety ; distinguished by being a little more depressed, with 

 more open umbilicus, &c. 



5. Valvata alpestris. 



Valvata alpestris, Blauner, Ms., Ktister, Conch. Cal. II, 1852, pi. 14, figs. 

 78, Qrindelwald. 



1 Aix-les-Bains ; coll. G. Nevill, Esq. 



Perhaps better classed as a var. of V. piscinalis ! In any 

 case, a well marked form ! 



12 Tirol ; coll. P. Bouvier, Esq. and P. Joly, Esq. 



6. Valvata eximia. 



Valvata eximia, Servain, Moll. Espagne, 1880, Badajoz : alt. 4, diam. 5 mil. 

 20 Burgos j coll. G. Nevill, Esq. 



7. Valvata virens. 



Valvata virens, Try on, Proc. Acad. Philad. 1867, pi. I, fig. 7, California. 

 18 Clear Lake, California; ex c. Prof. W. Newcomb. 



8. Valvata tricarinata. 



Cyclostoma tricarinatum, Lesueur, Ms., Say, Journ. Acad. Philad. 1, 1817, 

 Ro. Delaware: sect. Tropidina. 



30 New- York ; ex c. Revd. E. R. Beadle and Prof. W. Newcomb. 



var. unicarinata. 



Valvata unicarinatuin, De Kay, New-York Moll. 1840. 

 12 New- York ; coll. Prof. W. Newcomb. 



9. Valvata sincera. 



Valvata sincera, Say, Keating's, Narr. Long's Exp. II, App. 1824, North- 

 West Territory ; fide Newc. = V. humerosa, Tryon. 



6 California ; ex c. Prof. W, Newcomb. 



