60 DRYM^EUS, MEXICO AND CENTRAL AMERICA. 



and, finally, the whole shell is more or less provided with small 

 rounded impressions, which look as if they had been inflicted by 

 blows from a hammer (malleated). 



D. ATTENUATES (Pfeiffer). PL 2, figs. 6-16. 



Shell oblong-fusiforrn, thin but solid ; white, with irregular purple- 

 brown longitudinal blotched streaks, generally broken into spots ; 

 all markings sometimes lacking. Surface glossy, with inconspicuous 

 growth-strias and very fine, dense, shallowly engraved spiral lines 

 throughout. Spire conic with slightly convex outlines, the apex ob- 

 tuse. Whorls 6, the earlier ones yellowish ; last whorl oblong, tap- 

 ering below. 



Aperture oblong, white or showing the markings inside ; peristome 

 very gently expanded, white, thin ; the columellar margin reflexed 

 above, with an impression or groove at its insertion; the columella 

 cord-like, with a long fold above. 



Alt. 301, diam. 12^, length of aperture 16 mill. 



Alt. 31^, diam. 13^, length of aperture 17 mill. 



E. Mexico : Vera Cruz (coll. Cuming); Orizaba (Boucard, Bot- 

 teri); Cordova, commonly, on orange-trees (Hoge, Berendt); Atoyac 

 (H. H. Smith); Mirador (Sartorius). 



Bulimus attenuatus PFR., P. Z. S. 1851, p. 256; in Martini & 

 Chemnitz, Syst. Conch. Cab. ed. 2, Bulimus, p. 83, pi. 30, figs. 9, 

 10; Monogr. Helic. Vivent. iii, p. 336 (not of Mousson, 1854). 

 Bulimus (Liostracus) attenuatus PFR. in Malak. Blatt. ii, p. 152 

 (1855). Bulimulus (Drym&us} attenuatus VON MARTENS in Albers' 

 Die Helic. ed. 2, p. 212 FISCH. & CROSSE, Miss. Scient. Mex. 

 Mollusca, i. p. 491, pi. 23, figs. 1, la. Bulimulus attenuatus STREBEL, 

 Beitr. Mex. Land- und Siissw. -Conch, v. pp. 79-81, pi. 5, figs. 

 7a, b (not full-grown), 8a, b, c; pi. 13, fig. 13 (jaw); pi. 5, f. 15 



(white form) Otostomus (Drymceus) attenuates VON MARTENS 



Conch. Mittheil. ii, p. 192; Biol. Centr. Amer. p. 215, pi. 13, f. 15, 



16 Bulimus Kefersteini PFR., in Malak. Blatt. xiii, p. 82 (1866); 



Novit. Conch, iii, p. 310, pi. 75, fig. 8; Monogr. Helic. Vivent. vi, 

 p. 53. 



Specimens collected by W. M. Gabb in Costa Rioa (locality not 

 more exactly recorded) are somewhat thinner than Mexican speci- 

 mens; see pi. 12, figs. 16, 17. Some of these shells look deceptively 



