ANCDLOSA. 399 



9. A. corpulenta, Anthony. 



Anculosa corpttlenta, Anthony, Proc. Acarl. Nat. Sci., p. 68, Feb., 1860. 

 Anculotus corpidentus. Anthony. Reeve, Monog. Anculotus, t. l,f. 9. 

 Leptoxis corpulenta. Anthonj-, Binnev, Check List, No. 348. Bkot, List, p. 24. 



Description. — Shell ovate, or broad ovate, smooth, thick; spire 

 rather elevated ; composed of 4-6 subconvex ^vho^ls ; suture decid- 

 edly impressed; aperture very broad, ovate, ample, banded inside; 

 columella well rounded, slightly covered with white callus, aud with 

 a slight indication of sinus at base. 



Habitat. — Korth Carolina. 



Observations. — Cannot w^ell be confounded with any of its con- 

 geners ; it is unusually elevated for an Anculosa, resembling more a 



Faludina in that respect ; the whorls are regularly but not _ 



& -J Fig. 793. 



abruptly shouldered, and are often excavated with a nar- 

 row channel in the middle ; strice and even indistinct 

 carinJE are often visible, but are not a constant character; 

 the bands within the aperture are not always well defined 

 and are sometimes wanting altogether ; when present they 

 are generally five in number, and are arrested by a narrow white 

 space at the outer lip ; body- whorl often subangulated. Occurs in 

 Dan River, North Carolina, in company with Anculosa canalifera 

 (nobis), and appears to be common. Several hundred specimens 

 of various ages are now before me. — Anthony. 



A very distinct and beautiful species most nearW allied to 

 heav}', obsoletely angulated forms of dissi7mlis. The figure 

 is from the type specimen. Other specimens before me are 

 of somewhat larger size and more distinctly angulated. 



10. A. melanoides, Conrad. 



Anculotus mdnnoides, Coxrad, New Fresh-Water Shells, p. G4, t. 8, f. 10, 1834. 



DeKay, Moll. N. Y., p. 102. WHEATLEY, Cat. Shell ; U.S.. p. 26. Reeve, Monog. 



Anculotus, t. G, f. 48. MUlt.ER, Synopsis, p. 42, 183G. 

 Leptoxis melanoides, Conrad, lIxhDKyiAS, Monog. Leptoxis, p. 5, t. 5. f. 14.'). 146. 



BlXNEY, Check List, No. 36!). 

 Kitocvis melanoides, Conrad, AuAMS, Genera, i. p. 308. 

 Anculosa ( Mudalia) tiirgida, ILvldeman. Supplement to No. 1, Monog. Limniades, 



Oct., 1810. Whe.vtley, Cat. Shells U. S., p. 28. 

 Leptoxis turgida, IlALnEMAN, Monog. Leptoxis, p. 5, t. 5, f. 1.51. BixxEY, Check 



List, No. 393. Brot, List, p. 26. 

 Leptoxis turgida,B.a.\d., Ad.vjis, Genera, i, p. 307. 



