6 LIMNEA CATASCOPIUM. 



? Leptolimnea, Sw. Nearly cylindrical; spire thick, 

 lengthened; aperture small. 



L. elongata, Sow. gen. fig. 6. 



BuLiMNEA, Hal. Shell thick in texture, inflated, lip not 

 expanded. 



B. megasoma, pi. 3, fig. 1 — 3. 



AcELLA, Hal. Shell slender, whirls very oblique, aper- 

 ture expanded. Probably the same as Leptolimnea. 



A. gracilis, Jay's catalogue, pi. 1, fig. 10. 



LIMNEA CATASCOPIUM, Say. 



Plate 1. 



L. testa conica, tenui, ochracea; anfractibus quinis 

 convexis: sutura excavata, spira acuta: ultimo anfractu 

 ventricoso, apertura ovata. 



SYNONYMS AND REFERENCES. 



L. CATASCOPIUM, Say. Nich. Encyc. (Am. ed.) art. 



Conch., pi. ii. fig. 3. — Am. Conchology, pi. Iv. fig. 2. 

 L. piNGUisI Say. Jour. Acad. Nat. Sci., vol. ii. p. 123. 

 Z. CORNEA, Val. Rec. d'Obs. de Zoologie, &c., par 



Humboldt et Bonpland, vol. ii. p. 251. 

 Z. VirginianaI Lam., vol. viii. p. 411. — Desii. Encyc. 



meth. vers., vol. ii. p. 362, No. 21. 

 Z. CATASCOPIUM, Gould. Invert, of Mass., 223. 



