SUCCINEA. 77 



whorls a little tabulated posteriorly. Aperture narrow- 

 ovate, acute posteriorly ; the columella has an indistinct 

 fold. 



Length, three-tenths of an inch ; breadth, three-twen- 

 tieths. 



GEOGRAPHICAL DISTRIBUTION. As yet, this species 

 has been found only in the State of Ohio. 



REMARKS.- This small species is about the size of 

 $. avara, but is less ventricose in form, and of a more 

 vitreous structure, and more yellow cast of color. The 

 aperture especially, is far less rounded ; indeed, it is 

 more narrow than in any other American species. [G.] 



6. SUCCINEA OREGONENSIS, L.EA. 

 PLATE LXVII. c. FIGURE 2. 



Testa elongato-ovata, tenui, crocea, striis obsoletis re- 

 motis cincta : spira anfractibus tribus rotundatis ; sutura 

 conspicua ; apertura ovata ; columella arcuata, absque plica, 

 vitrea. 



SYNONYMS AND REFERENCES. 



Sucdnea oregonensis, LEA, Proc. Amer. Philos. Soc. 1841, II. 32. 

 DESCRIPTION. 



SHELL elongated ovate, thin, of a somewhat saffron- 

 yellow color, rather coarsely, though obtusely and dis- 

 tantly striated transversely. Spire with two and a half 

 or three well rounded whorls, separated by a distinct 

 suture, the last whorl seven-eighths the length of the 



