78 HELICID^. 



shell. Aperture two-thirds the length of the shell, 

 strictly ovate, one-third longer than broad ; columella 

 arcuate, but not folded, a thin white callus of consider- 

 able extent covering it. 



Length, one-fourth of an inch ; greatest lateral diam- 

 eter, one-eighth ; least, one-tenth of an inch. 



Geographical Distribution. Found by Mr. Nut- 

 taU, in Oregon. 



Remarks. Compared with S. aurea it is much 

 smaller, and combines red in its coloration ; the aper- 

 ture is more rounded at base, so as to be more broadly 

 ovate ; the whorls are also more rounded. Grains of 

 sand adhere to its surface, much as in the young of 

 ^S*. avara, but I can discover no epidermal hairs. — [g.] 



7. SUCCINEA OVALIS, GOULD. 

 Plate LXVII. a. Figure 3. 



S. testa oblongo-ovata, sub-conica, tenui, diaphana ; an- 

 fractibus ternis arctis, minutissime striatis, uUimo anfractu 

 elongate ; apertura conico-ovata, lata, ad anfractum ante- 

 riorem e.xpansa. 



SYNONYMS AND REFERENCES. 



Succinea ovalis, Gotild, Invertebrata, p. 194, f. 125. 



Ai>AMs, Catalogue, p. 270. Shells of Vermont, p. 6. 

 MiGHELs, Loc. cit., p. 28. 

 Sager, Loc. cit., p. 14. 



DESCRIPTION. 



Animal. A little longer than the shell, whitish or 



