18 BULIMFLUS-SCUTALUS. 



Bulimus thamnoicus var. 0, ORBIGNY, Voy., p. 291, pi. 37, f. 8. 

 Bulinus thamnoicus var. SOWB., C. Illustr., pi. 139, f. 72. Bulimus 

 revinctus HUPE, in Castelnau Exped., p. 39, pi. 7, f. 2 (1857). PFR. 

 Malak. Bl., 1859, p. 46. HIDALGO, Journ. de Conchyl., 1870, p. 58 ; 

 Viaje al Pacif., p. 112, pi. 5, f. 6. MORELET, Ser Concb., iii, p. 174, 

 pi. 8, f. 1. PFR., Monogr., vi, p. 123. 



The sculpture of the embryonic whorls is conspicuously different 

 from that of thamnoicus. For the rest I cannot do be.tter than to 

 give Morelet's remarks on this species. He says : " The separation 

 (of B. revinctus from B. thamnoicus) seems to us, after examining a 

 great many shells, a legitimate one. The form of revinctus is more 

 swollen, its spire shorter, the umbilicus generally more closed ; finally 

 the shell is thinner, less rudely striated, less distinctly granulated, 

 the peristome little thickened. Generally the coloration is a yellow- 

 ish-white or greenish-yellow, with wide and sometimes confluent 

 purple-brown zones, the aperture likewise banded in the interior. 



" We refer to the same species a variety collected at Huando, which 

 differs perceptibly from the type at least in its secondary characters. 

 This shell is a little less ventricose, of a very pale yellow with brown- 

 ish or corneous longitudinal striae, sometimes crossed by transverse 

 linear bands; the aperture is white within or visibly roseate, the 

 margins of the peristome are thin, and the umbilicus very narrow. 

 We note also a small variety of a light fawn color with wide black- 

 ish bands, from Sicaya. 



" B. revinctus inhabits the cold region of Peru, above the upper 

 limit of the temperate region. It occurs throughout the extent of 

 the Peruvian plateau, from Tarma to Cuzco, in rocky places, on 

 garden walls, etc." 



B. GAYI (Pfeiffer). Unfigured. 



Shell partly covered umbilicate, conic-ovate, rather solid ; brown 

 variously ornamented with narrow white bands. Spire conic, obtuse. 

 Whorls 5, moderately convex, the last a little longer than the spire, 

 rounded at base. Columella lightly arcuate, aperture little oblique, 

 truncate-oval, whitish inside ; peristome simple, the right margin 

 unexpanded, columellar margin much dilated, nearly closing the 

 narrow umbilicus. Alt. 27, diam. 16; aperture 15 mill long, 9 

 wide. (^P/V.). 



Bolivia (Mus. Cuming). 



Bulimus gayi PFR., P. Z. S., 1856, p. 389 ; Monographia, iv, p. 

 467. Con/. MORELET, Ser. Conch., iii, p. 176. 



