32 DRYM^TJS, MEXICO AND CENTRAL AMERICA. 



D. JOSEPHUS (Angas). PI. 26, figs. 6-13. 



Shell oblong-turreted, broadly rimate, thin but solid ; white with 

 thin pale buff cuticle, unicolored or with longitudinal stripes or spiral 

 series of spots of brown. Surface glossy, smooth, the growth-lines 

 inconspicuous, some very fine spiral lines generally to be seen on the 

 base, under a strong lens. Spire long, conic, with convex or nearly 

 straight lateral outlines, the apex obtuse. Whorls 7, convex, the 

 apical with typical Urymceits sculpture, the last very convex and 

 full below, slightly ascending in front. 



Aperture decidedly less than half the length of shell, ovate, the 

 peristome thin ; broadly expanded, columellar margin very much 

 dilated, impressed or channelled at the insertion above, the outer edge 

 produced in a wide lobe ; columella with a deeply entering fold. 



Alt. 32, diam. 14^, length of aperture 15 mill. 



Alt. 32J, diam. 15, length of aperture 13J mill. 



Alt. 30, diam. 14J, length of aperture 13 mill. 



Puerto Viejo, on the Rio Sarapfgui, in N.~E. Costa Rica (Biolley); 

 San Jose (Boucard) and Talamanca (Gabb) in central ; and on the 

 banks of Rio Pacuare del Sur^ in its middle course at about 500 meters 

 alt., valley of the upper Savegal, at 1000 meters alt., and in tlie ivoods 

 near Terr aba ; Quelrada de Tocori in the valley of the Rio Paquete, 

 and El Pital in the valley of the Rio Naranjo, in S.~ W. Costa Rica 

 (Pittier). 



Bulimus josephus ANGAS, P. Z. S., 1878, p. 73, pi. 5, f. 13, 14; 



1879, p. 478 Otostomus josephus MART., Biol. Centr. Amer., Moll., 



p. 202, with var. maculosus, pi. 12, f. 7, and var. concolor, pi. 12, f. 



8-10 (Aug., 1893) Bulimulus (Leptolyrsus} zeledoni DALL, Proc. 



U. S. Nat. Mus. xvi, p. 644, pi. 71, f. 2 (Nov. 23, 1893). 



Closely resembles D. zhorquinensis in the form of the umbilicus, 

 peristome and columella, as w r ell as in the color pattern ; but smaller, 

 with longer spire and less dilated last whorl. 



The typical color-form (figs. 11, 12) is striped longitudinally with 

 brown, the stripes either straight or somewhat angulated. 



Color- var. maculosus Martens (fig. 9), has four series of square 

 spots. It is from the banks of the Rio Pacuare del Sul, in south- 

 western Costa Rica. 



Color-var. concolor Mart. (figs. 6, 7, 8, 10, 13), uniform pale yel- 

 lowish. Occurs in N.-E., Central and S.-W. Costa Rica. Ball's 

 B. zeledoni (fig. 13) is a synonym. 



