FAMILY 1,Y.MN,«ID^ 65 



Geiuis Erinna Adams. 

 Shell small, with a short spire, a large final whorl ; the aperture 

 with a continuous peristome which passes behind a broad somewhat 

 excavated pillar; axis imperforate and the pillar not plicate. Type 

 E. ne-jucombi A.iSsim'6. Hawaiian. 



Incertcc sedis. 



Velutinopsis Sandberger. Shell almost planorboid, with few, 

 rounded, rapidly increasing whorls ; the aperture simple, suborbicular, 

 the peristome sharp, simple, not reflected ; the pillar lip broad, not 

 appressed ; the axis umbilicate. Type Z. vchitina Deshayes. Plio- 

 cene of the Crimea. 



Tanousia Bourguignat. Shell small ovate conic, closely and almost 

 involutely coiled ; the last whorl inflated, subcarinate behind, the aper- 

 ture contracted. Ty^e: L. zrmanja: Qru^'ina. Pleistocene of Dalmatia. 

 The group was named Sandria by Brusina in iSS5,^</e Westerlund. 



Zagrabica Brusina. Shell ventricose, with a short acute spire and 

 few rounded whorls, rugose, umbilicate, the last whorl ample, with a 

 rotund transverse aperture, and continuous peristome appressed on the 

 columellar margin ; the outer lip simple. The type is a Pleistocene 

 fossil. A recent form from the Caspian has been referred to this group 

 by Dybowski, under the name of Z. brusiniajta. 



I have not seen specimens, but the description reads as if the shell 

 might be a member of the Radix group which has been modified by 

 life in brackish water. 



Lymnaea stagnalis Linn6. 



Helix s/agnalh Linn6, Syst. Nat., ed. x, p. 774, 1758; ed. xii, p. 1249, 

 1767. 



Lymncea stagnalis Lamarck, Prodr., p. 75, 1799. 



Lymnaa jugularis Sax , Art. Conchology, Nicholson's Encyc, i (no pagina- 

 tion), 1817 ; 3d ed. (p. 6), 1819. — Halde.man, Mon. Limn., p. 16, pi. iv, 

 1841. 



Lymncea appressa Say, Joum. Acad. Nat. Sci., Phila., 11, p. 168, 1818. — 

 Halde.man, Mon. Limn., p. 18, pi. v, 1842. 



Umncza s/a^nalis \V. G. Binney, Land and Fw. Sh. N. Am., 11, p. 25, figs. 

 28-32,^1865. 



Range. — Europe, the Caucasus, western and northern Asia, the 

 northern United .States, Canada and British America. 



Lake Superior, Lake Winnipeg I the Saskatchewan River ! Carberry, 

 Manitoba ; Moose Factory, James Bay ! Knee Lake, Keewatin ! Slave 

 River, 25 miles below Peace River ! Great Slave Lake at Fort Rac ! 

 and Fort Resolution ! Fort Simpson ! and Fort i^mith I on the Mac- 



