182 NEW UNIONID^, MELANID^, ETC., 



S. Totteniana. Dr. Binney says this is synonymous with ovalis, Say.* But Dr. 

 Gould properly says it differs in being more fragile, and has a shorter spire. 

 It also differs in color. The interior of all my specimens is iridescent, — a 

 character I have never seen in ovalis. Mr. W. G. Binney says (Vol. iv.) he 

 " agrees entirely with Lea and Gould in separating it from obliqua, Say." 



S. Nuttalliana. Dr. Binney says this is synonymous with ovalis, Gould. Dr. Gould, 

 however, says this " no doubt is a well marked species." It certainly is very 

 different from ovalis, Gould, being much more slender, more oblique, and 

 different in color. In fact, I believe that Dr. Gould has described the same 

 shell as rusticana, in his volume of " Expedition Shells," p. 28. 



S. Oregonensis. Dr. Binney says that this " cannot at present be ascertained." Dr. 

 Gould says that the specimens furnished by Mr. Lea "leave no doubt of its 

 being decidedly a well marked species." Oregonensis is perhaps nearest to 

 Wardiana, but that shell has a smoother surface, is greenish, while Oregonensis 

 is yellowish ; and in the turns of the spire they differ entirely. 



S. inflata. Dr. Binney makes this synonymous with campestris, Say. Mr. W. G. 

 Binney says he " is inclined to doubt its specific weight." Inflata is smoother, 

 more inflated and more obtuse in the spire, as well as in really having one 

 whorl less. It ought to be retained until more specimens could be examined. 

 This species was founded on a single specimen sent by Dr. Eavenel, who also 

 sent me the true campestris. 



Helix Clarkii. PL 24, fig. 111. 



Testa superne rotundata, inferne plano-convexa, regulariter striata, bruneo-cornea, imperforata, uno-dentata ; 

 anfractibus septeais, oblique striatis ; apertura lunata, subdilata ; labro albido, reflexo, inferne calloso ; 

 columella in medio uno-dentata, ad basim impressa. 



Shell rounded above, flattened below, regularly striate, brownish horn-color, imper- 

 forate, with one tooth; whorls seven, obliquely striate ; aperture lunate, somewhat 

 dilate ; outer lip white, reflected, below thickened ; columella with one tooth in the 

 middle, at the base impressed. 



Proc. Acad. Nat. Sci., 1858, p. 41. 



Eah. — Tuskee Cove, Cherokee County, North Carolina, Prof D. Christy ; Hamil- 

 ton, Ohio. 



My cabinet and cabinets of Prof Christy and J. Clark, Cincinnati. 

 Diam. -51, Length -37 inch. 



Remarhs. — This is perhaps nearer to Pennsylvanica, Green, than any other species 



* At page 72, Vol. ii, Dr. B. says that Totteniana is " unquestionably " the same with obliqua, Say, consider- 

 ing obliqua = ovalis, but the figures ofthe two last species are very different. 



