UNIVERSITY 



DRYM^US, SOUTH AMERICAN. 209 



D. FLEXUOSUS (Pfeiffer). PI. 35, figs. 23, 24, 25. 



Shell compressed urabilicate, oblong turrited, solid. White or 

 nearly so, with conspicuously festooned black or blackish-brown longi- 

 tudinal stripes, which are dotted or lineolate with white, and at the 

 angles of the festoons coalescent more or less, forming three continu- 

 ous or interrupted spiral bands ; and with a continuous dark band 

 at the verge of the umbilicus. Surface shining, smooth. Spire long,, 

 the apex white, typically sculptured. Whorls nearly 7, convex, the 

 last not compressed at base. 



Aperture half the total length or less, somewhat oblique, ovate, 

 rose-purple or whitish and faintly showing the external pattern 

 within ; peristome broadly expanded throughout, white, becoming 

 rose-purple within ; the columellar margin reflexed ; columella with 

 a strong spiral fold above. 



Alt. 41, diam. 18-19 ; alt. of aperture 19-20 mill. 



Alt. 32, diam. 14i ; alt. of aperture, 17 mill. 



Mannato, U. S. of Colombia (Bland). 



Bulimus flexuosus PFR., P. Z. S., 1852, p. 136; Conchyl. Cab., p. 

 244, pi. 65, f. 6, 7 ; Monogr., iii, p. 329. Bulimus linostoma BLAND 

 in Adams' Contrib. to Conch., No. 11, p. 230. Not B. linostoma 

 Orb. 



The elaborate dotting or lineolation of the festooned stripes, as in 

 D. interpictus and glaucostoma, is a prominent feature. The elon- 

 gation of the spire, broadly spreading lip, the purple mouth and 

 umbilical crescent are also tolerably prominent and constant char- 

 acters. Bland called small specimens collected by him at Mar- 

 rnato " B. linostoma;" but they intergrade in size with the large 

 typical form, also before me from the same locality. 



D. MEMBIELINUS (Crosse). PI. 50, figs. 90, 91 ; pi. 34, figs. 15, 16. 

 Shell narrowly perforate, ovate elongate, rather thin, longitudi- 

 nally impressed with obsolete, inconspicuous somewhat wrinkle-like 

 striae; rather shining ; whitish, ornamented with a blackish-chest- 

 nut, sub interrupted transverse band dotted with white, and rather 

 wide, zig-zag and sometimes confluent tawny chestnut longitudinal 

 streaks, similarly white-dotted. Spire long conic, the apex a little 

 acute, suture simple. Whorls 6, convex, the embryonic 2 whitish, 

 the penultimate convexly inflated, the last whorl slightly ascending, 

 a little longer than the spire, slightly elongated, somewhat tapering 

 at base. 



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