XEOPETR^US. 171 



peristome 26, least 20 mill. ; aperture including peristome 27 mill, 

 long, 21 wide; excluding peristome 19 and 11. (Mts.'). 



Balzas, eastern Peru, at 963 meters alt. (Stiibel). 



Otostomus millegranus v. MART., Conchol. Mittbeil., p. 177, pi. 32, 

 f. 1-4. 0. (NeopetrcpMs) millegranus MTS., t. c., p. 194. SCHAKO, 

 t. c., p. 210 (jaw and teeth). 



This species, which was found in a very hot, sterile valley in the 

 Maranon region of eastern Peru, resembles the well-known B. pro- 

 tens in sculpture, but in the form of the shell, especially the per- 

 istome, and in markings, it is more like B. altopemvianus t which, so far 

 as coloration goes, approaches B. cora Orb. and tessellatus Shuttl.; 

 so that all of these, in shell characters, seem to form a connected 

 series. In the jaw and dentition, however, this new species is close 

 to altopemvianus, and both differ decidedly from proteus. (Mts.). 



N. RHODOLARYNX Reeve. PL 29, figs. 22, 38. 



Shell openly umbilicated, oblong- conic, rather solid, rugulose- 

 striate, marked with minute spiral lines ; opaque ; bluish-white, 

 with sparsely scattered corneous dots. Spire conic, the apex ful- 

 vous, rather acute. Whorls 8, convex, the last a little shorter than 

 the spire, rotund, the base a trifle compressed. 



Aperture little oblique, rounded-oval, fulvous within ; peristome 

 simple, the margins converging, right margin broadly expanded, 

 columellar margin much dilated. Alt. 35, diam. 15 mill. (Pfr.). 



Peru : from Ayacucho to gorges of the Apurimac River (Angrand), 

 adhering to rocks; Mission of Sarayacu (Deville). 



Bulimus rhodolarynx REEVE, P. Z. S., 1849, p. 98 ; Conch. Icon., 

 pi. 72, f. 518 (July, 1849). PFR., Monogr., iii, p. 329 ; vi, p. 35. 

 MORELET, Ser. Couch., iii, p. 187. HIDALGO, Journ. de Conchyl., 

 1870, p. 47 ; Viaje al Pacifico, Mol., p. 73. HUPE in Castelnau's 

 Exped., Moll., p. 44, pi. 6, f. 4. Bulimus derillei HUPE, Revue 

 Zool., 1850, p. 641, pi. 15. f. 3. ? ? Scutalus proteus W. G. BIN- 

 NEY, Ann. N. Y. Lye. N. H., ix, p. 36 ; Ann. N. Y. Acad. Sci., iii, 

 p. 123. 



The interior of the aperture varies from delicate purple-rose to 

 quite dark brownish. Aperture rounder than in B. corceformis. 

 The apical sculpture is unknown. It looks as though Binney had 

 transposed the radulse of this species and B. proteus. 



