Si! DKYM.KfS, MKXICO AND CENTRAL AMI KKA. 



apex of ill'' -Mine color. Surface somewhat sinning, smooth, showing 

 fine, superficially engraved spiral lines under a strong lens. Spire 

 high, straight->ided, the apex obtuse, with typical Dri/nums sculpture. 

 AVhorls (ii-7, but slightly convex. 



Aperture small, ovate, typically showing the bands inside; peri- 

 stoine acute, thin, unexpanded ; columellar lip triangularly reflexed 

 above ; columella straight. 



Alt. 2S, diam. 12, length of aperture 12 mill. 



Alt. 21 j,, diam. 10, length of aperture 9 mill. 



Yucatan : Campeche, on the shore (Morelet); Tabi, S. of Merida, 

 in the interior (F. D. Godman, Febr., 1888); Ruins of L( tint it (He.il- 

 prin Exped.). 



linlinitis tnijn'cah's MOKKI.KT, Test. Noviss. i, p. 9 (1849) PKK., 

 in Martini & Chemnitx, Syst. Conch. -Cab., ed. 2, /iit/i/ttnn, p. 198, 

 pi. 55, figs. 5, G ; Monogr. Helic. Vivent. iii, p. 424. /?///////.< 

 (Pyrytis') tropicalis PFR., in Malak. Blatt. ii, p. 159 (1855) l'il- 

 iiitit/tis (Liostraeus) tropicalis FISCH. & CKOSSE, Miss. Scient. Mex., 



Mollusca, i, p. 504, pi. 20, figs. 7, 8 Jin/imnfus frojifcii/is STBBBBL, 



Beitr. Mex. Land- und Siissw. -Conch., v, p. 95. PILSBRY, Proc. 

 Acad. Nat. Sci. Phila., 1891, p. 315. Otostonuis tropicalis MAK- 

 TKNS, liiol. Centr. Amer., p. 233. 



The specimens collected by Morelet (pi. 0, figs. 21, 22) have three 

 brownish-red bands on the last whorl, and are 27 to 28 mill, long, 

 with 7 whorls. Those taken at Labna by the expedition from the 

 A. idemy (fig. 23) are smaller, 21-22 mill, long, with the bands pink, 

 the upper two almost obsolete, and with a pink band just behind the 

 columella, which is somewhat stained with the same tint. The young 

 are a little keeled and the bands are more brown. This is the only 

 sinistral species of Dryina us known. 



GKOI !' OK D. AI.TKIJNANS. 

 1). AMI BN LN8 ( Heck). PI. i;>, figs. 38, 39, 40. 



shell narrowly perforate, ovate-conic, thin but im>drrai.-iy solid; 

 while or faintly bull-tinted with live spiral brown bands; the upper 

 one narrow, bordering the white-edged suture, the fifth forming a 

 rather large umbilical patch. Surface glossy, smooth, with slight 

 growth wrinkles and close, fine, engraved spiral stria', in some speci- 

 men-; >uhoh.-ole|e in place<. Spin 1 conic, the apex rather obtn-e, 

 having typical Dryma-us sculpture. Whorls .">,',, moderately con\ex. 



