BULIMULUS-SCUTALUS. 13 



variegated coloration, expanded lip and generally rather large um- 

 bilicus. The proteus group is geographically isolated from other 

 groups of Scutalus, and differs appreciably in conchological features. 



B. PROTEUS (Broderip). PI. 1, figs. 1, 2, 4, 5. 



Shell broadly umbilicate or rimate, ovate-conic, rather solid or 

 thin ; in color either (a) uniform dirty white or buff; (6) whitish 

 with about 6 spiral brown bands, sometimes the four median coales- 

 cent into two wide girdles ; (c) yellowish-brown or purple-brown, 

 spotted and obliquely streaked with buffer whitish. Surface densely 

 granulose by the intersection of close oblique wrinkles by impressed 

 spirals ; this sculpture sometimes very strong, sometimes weak ; 

 embryonic whorls very minutely densely pitted and vertically grooved. 

 Spire conic, the apex obtuse. Whorls 5 to 6 j, slightly convex, the 

 last weakly convex above, but full and convexly rounded below and 

 basally. 



Aperture hardly oblique, carried forward to the ventral level of 

 the body-whorl, white or variegated inside ; peristome well expanded, 

 flaring, the margins approaching, connected by a parietal callus ; 

 the columellar margin having a deep-seated oblique fold. 



Alt. 52, diam. 32 mill. 



Alt. 33, diam. 19 mill. 



Peru, at Truxillo, St. Jacinta, nearSamanco, and Pacosmayo (Cu ru- 

 ing) ; Lima (Paz) ; Pachacamac (Isern) ; Tarma (Jelski) ; Chota 

 (Stolzmann) ; Chili (Dr. Ruschenberger !) ; " Campana de Quillota' 

 (Couthouy). Under and among stones. 



Bulinus proteus BROD., P. Z. S., 1832, p. 107. SOWB., Conchol. 

 Illustr., f. 14, b, c. Bulimus proteus ORB., Voy., p. 307. DESK. 

 in Fer., Hist., p. 68, pi. 139, f. 1-3. OLD., U. S. Expl. Exped. 

 Moll., p. 78, f. 76. PFR., Monogr., ii, p. 61 ; vi, p. 42. HIDALGO, 

 Mol. Viaje al Pacif., p. 109 ; Journ. de Conchyl., 1870, p. 55.- 

 LUBOMIRSKI, P. Z. S., 1879, p. 724. DALL, Nautilus, vii, p. 26.- 

 Bulimus sordidus DESH. in Lam., An. s. Vert., viii, p. 267. REEVE, 

 Conch. Icon., pi. 17, f. lOOc. Not B. sordidus Less. Not B. proteus 

 of writers on Lower Californian mollusks. Not B. proteus 'Guild- 

 ing' Swainson, Malacol., p. 335, a nude name. 



Very similar to the Lower Californian B. montezuma Dall, but 

 the body-whorl is more convex and less produced below, the latter 

 half-turn of the suture descends less, and the extremely fine pitting 

 and wrinkling of the apical whorls is very unlike the straight riblets 

 of the Lower Californian species. 



