EUC ALODIUM. 5 



rowly reflexed throughout. Length 82, diam. 22 ram.; aper- 

 ture with perist. 21 mm. long, 15 wide (Pfr.). 



Chiapas, in S. E. Mexico, type locality. (Ghiesbreght). 

 Vera Paz (Bocourt) and Cohan (Salvin), in N. Guatemala. 



Cylindrella ghiesbreghti PFR., P. Z. S. 1856, p. 380, pi. 36, 

 f. 1; Malak. Bl. 1856, p. 215; Conchyl. Cab. p. 33, pi. 8, f. 

 18, 19 ; Monogr. iv. 694 ; vi, 364 ; viii, 426. TRISTRAM, P. Z. S. 

 1861, p. 231. SOWERBY, Conch. Icon, xx, pi. 1, f. l.Eucalo- 

 dium ghiesbreghti Pfr., CROSSE & FISCHER, Journ. de Conchyl. 

 1868, p. 88 ; 1870, p. 13, pi. 5, f. 1-4 (jaw and teeth) . Moll. Mex. 

 p. 368, pi. 14, f. 4, 4a (shell) and pi. 16, f. 14-21 (anatomy). 

 STREBEL, Beitr. Mex. Land-und Siissw.-Conch., iv. p. 63, 

 pi. 5, f. 20; pi. 14, f. 11 a, &.; with form B, p. 64, pi. 7, f. 4. 

 MARTENS, Biol. Centr.-Amer., Moll., p. 255. 



The dark reddish-chocolate color (fading above and on the 

 base and whitish around the mouth), the low, spaced, waved 

 and anastomosing wrinkles of the surface, and the decidedly 

 tapering contour, are characteristic. The number of whorls 

 remaining varies from 9 to over 13. It is very solid and 

 strong, with a strongly angular columella, and a strong spiral 

 lamella on the internal pillar (fig. 20). I retain the form 

 varietally separate from E. decollatum merely on account of 

 its long standing in the literature, as it differs from that only 

 in color. Fig. 21 is from one of Pfeiffer's types, after Strebel, 

 Fig. 19 from a typical specimen in coll. A. N. S. P., with lO 1 /^ 

 whorls. Fig. 18 from Crosse & Fischer. Neither of these fig- 

 ures is turned to show the strongly angular columella. 



One specimen before me (fig. 22) is isabella- tinted, paler 

 above, white behind the lip and the base. It has the form and 

 sculpture of the dark typical form, and a trifle over 9 whorls 

 remain. It is referable to typical E. decollatum. 



E. COMPACTUM Pilsbry. PL 7, figs. 1, 2, 3. 



Shell cylindric-tapering, solid, having a short, deep, closed 

 umbilical chink; the cuticle thin (deciduous?) very pale 

 straw-colored; composed of 8% narrow, somewhat convex 

 whorls, which are rather strongly striate, the striae arcuate, 

 from one-half to one-third of a mm. apart except on the last 



