GONIOBASIS. 277 



very much impressed; whorls about uiue, convex; aperture small, 

 soraewliat rounded, white withia; outer lip acute, scarcely sinuous; 

 columella bent in, very much thickened. 



Habitat. — Yellow Springs, Ohio. 



Diameter, -31; length, -05 inch. 



Obseitations. — Many years since two specimens of this species were 

 brought by a member of my family from the Yellow Springs of Ohio, 

 a much frequented watering place. They are both dead specimens, 

 but are well preserved iu form, while the epidermis has been rig. 533. 

 entirely removed. The columella is remarkably thick, and 

 the edge stands off fi'om the whorls, disi^laying an impression 

 at the axis amounting nearly to an umbilicus. It is nearly 

 allied to Grosvenorti herein described, but may be distin- 

 guished in having a shorter spire, less impressed sutures, a thicker 

 columella, and having an umbilical impression. The outer lip also is 

 not so sinuous and the whorls ai"e not so attenuate. It has its affini- 

 ties to Jlelania (^Goniobasis) varicosa, Ward, but has a different aper- 

 ture and has no veins. The aperture is about two-sevenths the length 

 of the shell. — Lea. 



This species is probably not distinct from semicarinata, Say. 



179. G. brevispira, Anthony. 



Mela7uabrevi.ipira,A-sriiosx,'Bo»t. Proc, iii, p. 301, Dec, 1S50. Binnev, Check 

 List, No. 3D. Jav, Cat., itli edit., p. 474. BuoT, List, p. 37. Reeve, Monog. 

 Melanin, Fp. 203. 



Melasma brevispira, Anthony, Adams, Genera, 1, p. 300. 



Description. — Shell small, elongate, ovate, truncate, rather solid, 

 Fig. 534. Fig. 535. plain, shining, brownish-green, paler at the sutures : 

 whorls 4-5, convex, somewhat declining at the sut- 

 ures : aperture ovate ; lip dilated before, sinuated 

 behind. 



Habitat. — Ohio. 

 Longitude, three-fifths; latitude, three-tenths poll. 

 Observations. — A small, plain species, with no ver}'' obvious, dis- 

 tinctive marks. It is allied to J/, plebejus, but is rather more slender. 

 It is usually much eroded. — Anthony. 



