DRYM^US, MEXICO AND CENTRAL AMERICA. 65 



Otostomus bugabensis von MARTENS, Biol. Centr. Amer., Moll., p. 

 218, pi. 13, f. 21, 21a (Sept., 1893). 



The two specimens obtained have the aperture damaged, but I 

 cannot refer them to any known species (Martens}. 



D. SARGI (Crosse & Fischer). PI. 3, figs. 30, 31, 32, 33. 



Shell scarcely rimate, oblong-ovate, thin, a little shining, nearly 

 smooth, with rather distant, obsoletely rugulose, scarcely percepti- 

 ble striae; dull whitish, painted with transversely interrupted dark 

 blackish-brown streaks and spirally-arranged series of spots. Spire 

 conic, the apex rather obtuse, suture somewhat irregularly impressed. 

 Whorls 5-J, moderately convex, the embryonal first 1J smooth, livid 

 brownish white ; the last whorl a little longer than the spire (as 

 12:10), inconspicuously submargined at the suture, painted with 

 twice interrupted longitudinal streaks and three spiral series of spots, 

 sometimes confluent, lost on the base and toward the lip. Aperture 

 acuminate-ovate, dull whitish inside, showing the bands and spots 

 through ; peristome simple, whitish, the margins joined by a very 

 thin callus ; columellar margin twisted inside, outwardly dilated, 

 almost completely closing the umbilical chink ; basal and outer mar- 

 gins a trifle expanded. 



Alt. 22, diam. 10, length of aperture scarcely 12 mill. ( C. $ F.} 



Northern Guatemala: Tamahu (Sarg). 



Bulimulus sargi CROSSE & FISCH., in Journ. de Conch., xxiii, p. 

 52 (1875). Bulimulus (Scutahu) sargi FISCH. & CROSSE, Miss. 

 Scient. Mex., Mollusca, i, p. 534, pi. 24, fig. 6, 6a. Bulimus sargi 

 PFR., Monogr. Helic. Vivent., viii, p. 59. Otostomus sargi MAR- 

 TENS, Biologia, p. 218, with var. motagua, pi. 14, f. 2, 2a. 



" Distinct from its allies by the smaller size, and the dark, almost 

 completely black, stripes on a white ground " {Mart.} 



Var. motagucK Martens (pi. 3, figs. 32, 33). Smaller, the streaks 

 more distinct, straight, wanting on the upper whorls. 



Alt. 19-21^, diam. 8J, length of aperture 11 mill. (Mart.) 



Central Guatemala: Valley of the Rio Motagua (Stoll). 



D. DROUETI (Pfeiffer). PI. 3, figs. 36-43. 



Shell nearly covered perforate, ovate conic, thin, rugulose-striate 

 (very obsoletely decussated with spiral striae); pale straw-colored, 

 typically marked with five reddish-chestnut interrupted bands formed 



5 



