16 

 LIMNEA JUGULARIS, Say. 



Plate 4. 



L. testa magna, ovato-conica, hevi, tenui, pellucida: 

 spira elongata, attenuata, apice subacute: anfractibus 

 longitudinaliter minutissime striatis: ultimo anfractu ven- 

 tricoso: columella pi'ofunde plicata. 



SYNONYMS AND REFERENCES. 

 L. JUGULARIS, Say. Nich. Encyc. Art. Conchology. 



L. SPSCIOSUS, ROSSMASLER, pi. 2, fig. 50. 



L. STAGNALis, Am. Jour. of Sci., vol. xxxi. p. 36. note f- 

 DESCRIPTION. 



Shell large, thin, ventricose, smooth, and 

 diaphanous, composed of six sHghtly convex 

 whirls, of which the lines of growth are very 

 fine: spire contracted and subulate, with the 

 apex pointed: aperture large, inner side sub- 

 rectilinear, outer margin slightly expanded: 

 columella with a deep fold: there is no umbilic, 

 the labium being in close contact with the last 

 whirl. 



Color light ochre yellow. 



