4 BULIMULUS-PLECTOSTYLUS. 



24, 25 (young shell) ; Monogr., ii, p. 150 ; iii, 384 ; iv, 450 ; vi, 90 ; 

 viii, 126. HUPE in Gay, Hist, de Chile, viii, p. 102, pi. 1, f. 4, 4a r 

 4b. HIDALGO, Viaje al Pacif., p. 115. Buliminus coturnix BECK, 

 Index, p. 69. 



A solid, ventricose species, with very oblique aperture and pecu- 

 liar coloration. The markings are of a "burnt chestnut" as Reeve 

 aptly says. The young shells, which are commoner in collections 

 than the adults, are rather thin, but still readily separable from 

 young broderipii by the shorter, more obese form and straight colu- 

 mella. The periphery is subangular in quite young examples (fig. 

 91, 92). Figs. 89 and 90 are drawn from the largest specimen I have 

 seen. 



B. BRODERIPII (Sowerby). PI. 6, figs. 79, 80, 81, 82, 83. 



Shell imperforate, ovate, thin and rather fragile. Very pale buff 

 or white, with numerous spiral girdles of squarish or irregular black- 

 brown spots and (typically) rounded dots, this pattern often much 

 obscured by the running together of the spots to form vermiculate 

 figures or streaks, and the more general dispersion of dots. Surface 

 smoothish, superficially wrinkle-striate, cut by spirals into revolving 

 series of granules with very delicate spiral striation between them ; 

 apex with very delicate waved vertical riblets. Spire conic, the 

 apex rather projecting, white ; whorls 5-5 i, the earlier 2 convex, 

 not variegated, the rest very weakly convex; last whorl distinctly 

 flattened above. 



Aperture quite oblique, ovate, with distinct color-pattern within ; 

 outer lip unexpanded, straightened above, columella concave, form- 

 ing a long spiral, its edge reflexed in a very thin appressed callus. 



Alt. 45, diam. 28 mill. ; alt. of aperture 30 mill. 



Alt. 46, diam. 26 mill. ; alt. of aperture 27? mill. 



Alt. 33, diam. 21 mill.; alt. of aperture 20 mill. 



Alt. 24, diam. 13 mill. 



Chili : Copiapo and Cobija (Orb.) ; Huasco (Martinez) ; Paposo 

 (Paz) ; Iquiqui, Peru (Cuming). 



Bulinus broderipii SOWB., P. Z. S., 1832, p. 50; Conch. Illustr-, 

 f. 1, 1*, 1**. Bidimus broderipii DESH. in Lam., An. s. Vert., viii, 

 p. 263. ORB., Voy., p. 266. REEVE, Conch. Icon., pi. 16, f. 97 

 PFR., Monogr., ii, p. 146 ; Conchyl. Cab., p. 213, pi. 60, f. 20, 21. 

 GAY, Hist. Chile Zool., viii, p. 101, Atlas, pi. 2, f. 2. HIDALGO, 

 Viaje al Pacif., p. 117. Helix broderipii ORB., Mag. de Zool., 1835, 



