DRYM.EUS, SOUTH AMERICAN. 199 



D.IN^EQUALIS (PfeifFer). PI. 38, figs. 11, 12,13, 14,15. 



Shell perforate, obliquely fusiform, rather thin, slightly striated, 

 shining; white, painted with wide, branching purple-black stripes. 

 Spire long-conic, sometimes fulvous above, the apex acute; suture 

 simple. Whorls 7, slightly convex, the second seen to be very 

 minutely decussated under the lens, penultimate a little more con- 

 vex, the last slightly ascending in front, somewhat tapering at base ; 

 colurnella violaceous, straight, obliquely folded above. Aperture 

 vertical, long ear-shaped, about half the length of shell ; colored 

 within like the outside, margined with violaceous ; peristome white, 

 broadly expanded, a trifle reflexed, the terminations joined by a 

 very thin callus; right margin regularly arcuate, columellar margin 

 a little dilated, reflexed, nearly covering the perforation. Alt. 43, 

 diam. 13 mill. (Hidalgo'). 



Napa, Ecuador (Martinez) ; Banks of the Maranon River (Pfr.). 



Bidimus incequalis PFR., P. Z. S., 1856, p. 330 ; Monogr., iv, p. 390; 

 Novit. Conch., ii, p. 158, pi. 42, f. 3-5. HIDALGO, Jour, de Conchyl., 

 1870, p. 48 ; Mol. Viaje al Pacifico, p. 74, pi. 5, f. 4, 5. Drymceits 

 incequalis MILLER, Mai. Bi., xxv, p. 190. 



Hidalgo mentions a variety with three indistinct interrupted bands 

 crossing the streaks, and scarcely any violaceous coloring in the 

 aperture (figs. 14, 15). 



D. PETASITES Miller. PI. 38, figs. 9, 10. 



Shell perforated, obliquely fusiform, rather thin, with slight 

 growth-lines and excessively delicate, rather spaced, spiral incised 

 striae, mainly above the periphery ; glossy, shining ; white, becoming 

 faintly buff on the last whorl, with wide, purple-black longitudinal 

 stripes which branch as they approach the suture above, on the last 

 whorl, and are brown, waved and generally simple on the spire. 

 Lateral outlines of spire slightly convex, apex decidedly obtuse ; 

 whorls 6J, slightly convex. 



Aperture oblong, slightly oblique, less than half the length of 

 shell, white, faintly lilac tinted, and conspicuously banded inside ; 

 peristome broadly expanded, flaring and a trifle effuse below ; col- 

 umella white, spirally twisted above, the margin flatly reflexed above. 



Alt. 34, diam. 14 mill. ; aperture 161 mill. long. 



Nanegal and Sebondoi, in the Pilaton Valley, Ecuador, 1 ,000 meters 

 alt. ; woods among leaves (Boetzkes). 



Drymceus petasites MILL., Malak. Bl., xxv, 1878, p. 189; and (n. F.) 

 i, 1879, pi. 7, f. 2a, b. ? Bidimus fusoides var. fi PFR., Monogr., iii, p. 

 329. 



