SUCCINEA. 69 



careous matter in the shell than in the other species. 

 When somewhat advanced in age they want the peculiar 

 transparency and delicate periostraca common to other 

 species of the genus, and in general aspect are not un- 

 like some Bulimi. If differences are admitted, where 

 all are so much alike, this southern species is unques- 

 tionably different from any of its northern congeners. 



The shell described by Messrs. Gould and Mighels, 

 and that indicated by Dr. Sager, by name, as Succinea 

 campestris, is in our opinion not the shell described by 

 Mr. Say under that name. 



2. SUCCINEA OBLIQUA, SAY. 

 PLATE LXVII. b. FIGUKE 3. 



S. testa ovata, lymnse-formi, tenui, pellucida ; anfractibus 

 ternis vel quatuor convexis, ultimo anfractu magno ; aper- 

 tura ovali, obliqua ; spira brevi. 



SYNONYMS AND REFERENCES. 



Swcinea ovalis, SAY, Phil. Journ. I. p. 15, II. p. 163. 

 KIRTLAND, Loc. cit. p. 173. 

 FERUSSAC, Tab. Syst. No. 8, pi. 11, A., f. 1. 

 LAMARCK, 2d edit. VIII. p. 319. 



Succinea obliqua, SAY, Exped. St. Peters, II. p. 260, pi. 15, f. 7. 

 ADAMS, Shells of Vermont, p. 6. 

 DE KAY, Loc. cit. p. 31. 



Succinea campestris, GOULD, Inverteb. of Mass. p. 195, f. 126. 

 SAGER, Loc. cit. p. 11. 

 MIGHELS, Loc. cit. p. 28. 

 Succinea totteniana, LEA, Proceed. Amer. Philos. Soc. II. 31 - 2. 



DESCRIPTION. 



ANIMAL. Superior tentacles blackish, their base 



