XONITES. 187 



II. KI RYOMriiALA, Pfr. PL 56, figs. 57-59. 



Rather widely, perspective!}' umbilicated, thin, pellucid, yel- 

 lowish or olivaceous-corneous, closely 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. 



Coban and Vera Paz, Guatemala. 



H. cymbalum, Morelet, is a synonym. 



Section ZONYALIXA, Martens, 180."). 



II. VERACRUZKNSIS, 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. 



Cordova, Vera Cruz, Mexico. 



II. JALAI'EXSIS, Stivbel. PL 56, figs. 62-64. 



Moderately umbilicated, rather thick, but translucent, some- 

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

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

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

 4^-5, flatly convex, more convex below. Diam. 11 mill. 



Jalapa, Mexico. 

 II. SIGMOIDES, Morelet. PL 56, figs. 65-67. 



Xarrowl}' perforate, plane above, convex below, with rounded 

 periphery, whitish corneous, thin,obsoletely rhomboidally granu- 

 late and shortly hirsute, spire involute, w r ith immersed apex and 

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

 very thin. Diam. 19 mill. 



Vera Faz, Guatemala. 



H. vitrinoideSj Tristram, is a synonym. 



II. BILINEATA, Pfr. PL 56, figs. 68-72. 



Narrowly umbilicated, thin, shining, pellucid, smooth, lightly 

 striulate, more distinctly so at the suture, yellowish corneous, 

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

 broader one above the periphery ; whorls 5, slightly convex, 

 regularly moderately increasing, base more convex. 



Diam. 15 mill. Jalapa, Mexico. 



