80 DRYM^EUS, MEXICO AND CENTRAL AMERICA. 



W. Mexico: Chilpancingo, State of Guerrero, at an altitude of 

 4600 ft. (H. H. Smith.) 



Otostomus moritinctus MARTENS, Biol. Centr. Amer., p. 228, pi. 

 14, f. 9, 10 (Sept., 1893.) 



A very distinct species, allied to D. livescens, but thinner, larger, 

 with more ventricose whorls and larger aperture. One of the speci- 

 mens before me shows scarcely any of the scattered dots mentioned 

 above, and in another the peripheral band is only faintly indicated. 

 The apex shows the fine grating characteristic of Drymceus. Von 

 Martens writes: 



" Varies somewhat in the more or less pure whitish, yellowish or 

 slightly reddish hue of the general coloration, in the more or less 

 broad and dark peripheral band, in the presence, disposition, and 

 number of the black points, which are either arrow-like or rounded, 

 and in the presence or absence of a large brown streak near the 

 aperture; the base of the shell near the umbilical cleft is in some 

 examples bright rose-colored. The uppermost whorl is curiously 

 punctured." 



D. LIVESCENS (Pfeiffer). PI. 4, figs. 76-81. 



Shell scarcely perforate, ovate-turreted, smooth, livid-whitish 

 marked with a few brownish streaks. Spire long, acute. Whorls 7, 

 nearly flat, the last shorter than the spire. Aperture narrow, oblong, 

 brownish inside ; peristome simple, the columellar margin slightly 

 revolute, covering the small perforation. 



Alt. 23, diam. 9, length of aperture 10, width 5 mill. (Pfr.) 



Central Mexico : Tehuacan (Hegewisch, Uhde); Tecomavaca, in 

 the State of Puebla, S. E. of Tehuacan, Cactus and Mimosa region 

 (Hoge). W. Mexico: Chilpancingo, in the State of Guerrero (H. H. 

 Smith). 



Bulimus livescens PFR., Symb. Hist. Helic. ii, p. 48 (1842); 

 Monogr. Helic. Vivent. ii, p. 175 REEVE, Conch. Icon, v, Bulimus, 



pi. 47, fig. 304 PHILIPPI, Abbild. neuer Conch, iii, p. 96, pi. 9, 



fig. 3 Bulimus (Mesembrinus] livescens ALBERS, Die Helic. ed. 1, 



p. 157 PFR. in Malak. Blatt. ii, p. 158 (1855). 0rthalicus (Me- 

 sembrinus) livescens H. & A. ADAMS, Gen. Rec. Moll, ii, p. 157. 

 Bulimulus (Mesembrinus) livescens VON MART, in Albers' Die Helic., 

 ed. 2, p. 214; Malak. Blatt. xii, p. 27 (1865) FISCH. & CROSSE, 

 Miss. Scient. Mex., Mollusca i, p. 543 Bulimulus livescens STREBEL, 



