70 DRYM^EUS, MEXICO AND CENTRAL AMERICA. 



duced to simple rows of spots (fig. 12). In other specimens, bands 

 are wanting; inconspicuous or distinct corneous-brown streaks, with 

 more or less zigzag white lineolation composing the pattern (fig. 13). 

 The apex may be either roseate or pale, in perfectly preserved shells. 

 Var. hoffmanni Martens. PL 6, figs. 5, 6. 



More slender, the upper and lower bands simple, the middle band 

 only being maculated. 



Alt. 19, diam. 9J, aperture 10 J mill. 



Central Costa Rica: Woods of San Lorenzo de Dota, 1300 metres 

 above the sea (Pittier). S. W. Costa Rica: Heredia, on trees (Carl 

 Hoffmann, 1856). 



D GABBI (Angas). PL 6, figs. 7, 8, 9, 10, 11. 



Shell imperforate or subperforate, obliquely ovate, obese, thin but 

 rather solid ; white or light greenish-yellow, unicolored, or pale 

 fleshy with scattered white dots and several spiral bands composed of 

 irregular brown spots. Surface very glossy, smooth, with slight 

 growth-lines but no spiral sculpture. Spire short, conic, the apex 

 with typical Drymteus sculpture ; whorls 4^-4f , slightly convex, the 

 last large, oblique, flattened above on its latter portion, inflated at 

 the periphery. 



Aperture ovate, oblique, whitish within ; peristome thickened within, 

 a little expanded, rose colored ; columellar margin narrowly reflexed 

 above ; columella narrow, concave ; parietal wall deep rose-colored. 



Alt. 22, diam. 14, length of aperture 12 mill. 



Alt. 15, diam. 11^, length of aperture 8^ mill. 



Central Costa Rica, upon the flank of Pico Blanco, alt. 3000-6000 

 ft., on the ground (Gabb); N.-E. Costa Rica at La Paz, on the road 

 to the Rio Sarapiqui (Biollev). 



Bulimus gabbi ANGAS, P. Z. S., 1879, p. 477, pi. 40, f. 3, 3a. 

 Not Bulimulus gabbi Crosse & Fischer, 1872, see p. 147 Otostomus 

 angasi v. MARTENS, Biol. Centr. Amer., Moll., p. 207 (August, 

 1893). Bulimulus irazuensis BINNEY, Ann. New York Acad. i, p. 

 262, pi. 11, fig. 1 (radula, jaw) (1879) Bulimulus gabbianus BIN- 

 NEY, Ann. New York Acad. iii, p. 124, pi. 12, f. L (jaw, teeth). 



A very distinct and peculiar species, slightly resembling D. castus 

 in the pink peristome, but much more closely allied to D. tripictus 

 Alb., in form, absence of spiral sculpture, and in the color pattern. 

 The peculiar oblique compression of the last whorl, most conspicuous 

 as seen from behind, is a characteristic feature. 



