XONITES. 187 



H. EURYOMPIIALA, Pfr. PI. 56, figs. 51-59. 



Rather widely, perspectively umbilicated, thin, pellucid, yel- 

 lowish or olivaceous-corneous, closel} 7 regularly costulate-striate 

 above, with occasional impressed faint spiral lines, distantly 

 wrinkled-striate and more shining on the base ; whorls 6, some- 

 what convex, moderately increasing, the last dilated anteriorly. 



Diam. 37 mill. 



Cdban and Vera Paz, Guatemala. 



H. cymbalum.) Morelet, is a synonym. 



Section ZONYALIXA, Martens, 1805. 



II. YERACRUZENSIS, Pfr. PL 56, figs. 60, 61. 



Rather widely umbilicated, somewhat thin, striulate, pellucid, 

 very shining, yellowish or orange-corneous, suture subcrenulately 

 margined ; whorls 5, scarcely convex, periphery angulated, base 



more convex. Diam. 12'5 mill. 



C"i </'>rn. V> j ra Cruz, Mexico. 



IL. JALAPENSIS, Strebel. PL 56, figs. 62-04. 



Moderately umbilicated, rather thick, but translucent, some- 

 what shining, yellowish horn-color to brownish olive, becoming 

 more greenish towards the mouth and on the base, with darker 

 growth-strise, costulate striate, with a few r fine spiral lines; whorls 

 -H-5, flatly convex, more convex below. Diam. 11 mill. 



Jalapa, Mexico. 

 H. SIGMOIDES, Morelet. PL 56, tig*. 65-67. 



Xarrowly perforate, plane above, convex below, with rounded 

 periphery, whitish corneous, thin, obsoletely rhomboidally granu- 

 late and shortl}' hirsute, spire involute, with immersed apex and 

 deep suture; whorls 3-^-4, rapidly increasing, lip of the aperture 



very thin. Diam. 19 mill. 



V>'ra Faz, Guatemala. 

 H. uitri/ioiih's, Tristram, is a svnonvm. 



/ / 



H. BILTNEATA, Pfr. PL 56, figs. 68-72. 



Xarrowl}- umbilicated, thin, shining, pellucid, smooth, lightly 

 striulate, more distinctly so at the suture. } r ellowish corneous, 

 with two chestnut lines or bands, one at the suture and a somewhat 

 broader one above the periphery ; whorls 5, slight^ convex, 

 regularly moderately increasing, base more convex. 



Diam. 15 mill. Jalapa, Mexico. 



