DRYM^EUS, MEXICO AND CENTRAL AMERICA. 57 



that country is only 20 millim. long, perhaps not full grown. 0. 

 roseatits, Reeve, from Columbia, comes very near this species." 

 (Martens.) 



D. LINEOLATUS (Conrad). PL 1, figs. 90, 91. 



Shell scarcely perforate, ovate-conic, thin but moderately solid ; 

 opaque white, somewhat more than the lower half of the last whorl 

 tinted with light chestnut ; striped longitudinally with dark purplish- 

 chestnut, the stripes not reaching to the suture above, nor to the 

 base below. Surface glossy, smooth, showing traces of an excessively 

 fine, dense spiral striation in places. Spire rather short, conic, with 

 slightly convex lateral outlines ; apex obtuse ; sutures but slightly 

 impressed. Whorls 5J. 



Aperture oblong, decidedly exceeding half the total length of 

 shell, and greater than the total diameter; sub vertical, streaked in- 

 side ; columellar margin reflexed and closely appressed above, pressed 

 in at its insertion ; columella cord-like, vertical and straight; outer 

 lip a little and gently expanded. 



Alt. 25, diam. 13, length of aperture 15, width within 7-J mill. 



Alt. 25, diam. 11.8, length of aperture 14, width within 6 mill. 



Volcan de Cartago, Central Costa Rica. 



Bulimus lineolutus CONRAD, Proc. Acad. Nat. Sci. Phila., viii, p. 

 42 (1855) PFR. Monogr. Helic. Vivent. iv, p. 398 not Otosto- 

 mus recluzianus var. lineolatus Martens, Biol. Centr. Amer. Moll., 

 p. 214. 



The spire is decidedly shorter than in D. recluzianus Pfr. , the 

 aperture longer, produced at base, and -with less arcuate outer lip, 

 and the 1 columella is cord-like, and almost perfectly straight and ver- 

 tical. Description and figures are from the types in coll. A. N. S. P. 



D. LIRINUS (Morelet). PL 1, fig. 96. 



Shell nearly imperforate, oblong-fusiform, irregularly rugate- 

 striatulate, very obsoletely decussated (under the lens) with incon- 

 spicuous transverse lines, thin, delicate, milk-white. Spire length- 

 ened, the apex rather obtuse ; suture impressed, whorls 6, a little 

 convex, the embryonal 1^ smooth, corneous, the last scarcely longer 

 than the spire ; columella spirally twisted, filiform, of the same color. 

 Aperture acuminate-oblong, shining and white within ; peristome 

 5 



