DRYM^EUS, MEXICO AND CENTRAL AMERICA. 89 



oval-oblong, colored within like the outside ; peristome unexpanded, 

 simple, the columellar margin expanding in a triangular plate. Alt. 

 18J, diam. 10, length of aperture 9 mill. (Pfr.) 



Honduras (Dyson). 



Bulimus Jiondurasanus PFR., P. Z. S., 1846, p. 29; Monogr. Helic. 

 Vivent. ii, p. 209. REEVE, Conch. Icon, v, Bulimus, pi. 59, fig. 400. 

 ? Bulimus honduratianus TRISTRAM, P. Z. S., 1861, p. 230. Buli- 

 mus (Leptomerus) Jiondurasanus PFR. in Malak Blatt. ii, p. 160 

 (1855). Orthalicus (Leptomerus) hondurasanus H. & A. ADAMS, 

 Gen. Rec. Moll, ii, p. 156. Bulimulus (Liostracus) Jiondurasanus 

 FISCH. & CROSSE, Miss. Scient. Mex., Mollusca, i, p. 503. Otosto- 

 mus honduranus VON MARTENS, Biol. Centr. Amer. p. 232. 



Known to rne only by the description and Reeve's figure, and per- 

 haps, as von Martens remarks, not separable from D. alternans. l 'A 

 very delicate, transparent, rose-tinged shell." (Rve.) 



D. TRANSLUCENS (Broderip). PI. 24, figs. 28, 29. 



Shell oblong-pyramidal, with a small umbilical chink, pale yellow- 

 ish white, translucent, thin ; surface glossy, showing fine, irregular 

 growth lines and some faint, almost obsolete spiral strias under the 

 lens. Spire conic, the apex obtuse, with typical Drymceus sculpture; 

 whorls 5, a little convex, rapidly widening, the last ventricose, 

 (keeled in immature shells). Aperture ovate r large, about half the 

 length of the shell ; outer lip thin, unexpanded ; columella reflexed 

 and appressed above, somewhat excised and slightly subtruncate 

 below. 



Alt. 22, diam. 12.5 mill. 



King's and Saboga Is., Bay of Panama, (Cuming). 



Bulinus translucens BROD., P. Z. S., 1832, p. 31. SOWB., Con- 

 chol. Illustr. f. 11. Bulimus (Bulimulus) translucens BECK, Index 

 Moll. p. 67 Bulimus translucens DESH., in Lam. An. s. Vert, viii, 

 p. 265 PFR., Monogr. ii, p. 195; iii, p. 437; iv, 501; vi, 151; Con- 

 chyl. Cab. p. 241, pi. 63, f. 27, 28. REEVE, Conch. Icon. pi. 13, f. 

 71. Bulimulus (Leptomerus) translucens v. MART., in Alb., Die 

 Hel. (2), p. 222; Biol. Centr. Amer., Moll., p. 250. 



This species " when in fine preservation is so translucent that the 

 internal pillar and structure of the shell may be plainly viewed 

 through its glassy surface" (Brod.). It has hitherto been referred 

 to Leptomerus, but the apical sculpture shows it to belong to Drymceus. 



