DRYM^EUS, SOUTH AMERICAN. 295 



polished and glossy, the coloring brighter and more diversified, 

 responding to the tropical aspect of the flora. 



Probably B. DENDRITIS Morelet (Vol. X, p. 180) is a Drymwus 

 allied to the foregoing species. 



D. BICOLOR (Sowerby). PI. 49, fig. 65. 



Shell oblong, subacuminate above; pallid, with interrupted brown 

 bands. Whorls 5, subventricose, the last larger; umbilicus small. 

 Aperture subovate, acuminate behind; peristome thin, subacute. 

 Alt. 0-9, diam. 0'4 inch (Sowb.). 



Province Xagua, Peru (D. Matthews) ; Banks of Ueayali River, 

 Ecuador (Orton). 



Bulinus bieolor SOWERBY, P. Z. S., 1834, p. 141. Bulimus bi- 

 color PHIL., Abbild. u. Beschreib., ii, p. 113, Bul. t pi. 4, f. 8.- 

 REEVE, Conch. Icon., pi. 44, f. 276. PFR., Monogr., ii, p. 198; 

 viii, p. 163. CROSSE, Journ. de Conchyl., 1871, p. 317. 



Pfeiffer, in Monographia, iii, p. 419 ; iv, p. 479 ; vi, p. 126, and viii, 

 p. 163, considers B. polymorphic Orb. the same. I have seen 

 neither species, and have described polymorphus as a Scuta lus (p. 

 28). Being ignorant of the apical sculpture, I can express no 

 opinion upon the systematic position of either species. " The lower 

 edge of the bands is peculiarly broken or serrated," according to 

 Reeve. 



D. PAETELI (Albers). 



Shell perforate, ovate-conic, thin, rather smooth ; yellowish-white, 

 ornamented with four purple-brown bands. Spire conic, acute. 

 Whorls 6?, rather flat, the last scarcely longer than the spire, some- 

 what tapering at base. Aperture oblique, oblong-oval, buff, banded 

 with chestnut inside ; peristome thin, a little expanded, the right 

 margin lightly arcuate, columellar margin membranaceous, widely 

 reflexed above, conspicuous, somewhat excavated. Alt. 25, diam. 

 10*, length of aperture 14, width inside 7 mill. (Pf/ 1 .)- 



On the Maranou River (Albers coll.). 



Bulimus paeteli ALB., Malak. Bl., 1854, p. 31. PFR., Monogr., 

 iv, p. 398. 



An unfigured species from "adfluvium Maranhon in confinibus 

 Columbice ; ' but this refers probably to the former wide extension 

 of Colombia southward. 



