GONIOBASIS. 315 



224. G. ampla, Anthony. 



Melania ampla, Anthony, Ann. N. Y. Lye, vi, p. 93, t. 2, f. 12, 1S54, Binnev, 

 Check List, No. 13. Brot, List, p. 39. Reeve, Mouog. Melania, sp. 312. 



Melanict Ilartmaniana, Lea, Proc. Acad. Nat. Sci., ISGl. 



Goniohasis Ilart/nanii, Lea, Jour. Acad. Nat. Sci., v, pt. 3, p. 218, t. 'M, f. 1, 1863. 

 Obs., ix, p. 40. 



Description. — Shell ovate conic, smooth, thin ; spire obtusely ele- 

 vated; whorls o-G, subconvex; body-whorl ample, surrounded with 

 four dark grceuisli bauds; sutures irregularly and deeply impressed ; 

 aperture large, ovate, within roseate and banded, col- Fig. 607. 

 umella rounded, slightl}'^ indented, and a little effuse 

 at base. 



Habitat. — Alabama. 



Diameter, -58 of an inch (15 millim.) ; length, 1-25 

 inches (32 millim.). Length of aperture, -58 (15 mil- 

 lim.) ; breadth of aperture, -30 of an inch (8 millim.). 



Observations. — Compared with 31. olivula, Conrad, 

 it is a larger, much less solid species, the epidermis is thinner, less 

 polished, and has not the fine contrasting colors which render 31. oli- 

 vula so lively and pleasing ; differs from 31. fuliginosa, Lea, in being 

 far less ponderous, with fewer and less distinct bands, by the distinct 

 angle passing round the shell near the top of the mouth, and by its 

 capacious aperture, which last two points apply with equal force to 

 olivula. Although in some points, and particularly in its ample mouth, 

 it resembles 3f. Jlorentina, Lea, it has not the shouldered whorls and 

 tubercular armature which distinguish that beautiful species. The 

 bands within the aperture do not reach its outer edge, but a broad, 

 plain area is left between. — Anthony. 



3Ielania amj)la is not a fully grown shell, as will be seen by- 

 reference to the accompanying figure which is copied from Mr. 

 Anthony's type specimen, but that the species is the same as 

 Hartmanii cannot be doubted. Some specimens before me 

 are slightly striate transversely. 



The following is Mr. Lea's description of G. Hartmanii 

 together with a copy of his figure. 



Description. — Shell smooth, conical, large, dark horn or olive color, 

 much banded, imperforate ; spire obtusely conical ; sutures nmch im- 

 pressed ; whorls somewhat flattened, about seven, the last large; 



