BULIMUtTJS-PLECTOSTYLUS. 3 



b. Coarsely plicate or wrinkled, without spiral striae ; colu- 

 mella twisted, and with the parietal wall, purplish, 



peruvianus. 

 bb. Longitudinal sculpture fine ; columella white, 



c. Conspicuously granulose throughout; yellowish, 

 with narrow, distant brown streaks ; columella 

 folded, chilensis. 



cc. Slender, with delicate or subobsolete granula- 

 tion ; streaked, but with a defined unicolored 

 baso-columellar tract ; alt. about 36 mill., 



reflexus. 



ccc. Smaller than reflexus, with much the same sculp- 

 ture and color, ochsenii. 

 cccc. Much speckled ; granulose below sutures, 



coquimbensis. 



ccccc. Striped alternate white and corneous, with brown 

 longitudinal lines and interrupted basal spirals ; 

 smooth, perelegans. 



B. COTURNIX (Sowerby). PL 6, figs. 89, 90, 91, 92. 



Shell imperforate or nearly so, ovate, rather solid. Whitish, with 

 spiral series of chestnut-brown blotches, often wedge-shaped, triangu- 

 lar, or otherwise peculiar in form, and on the last whorl of adults 

 generally more or less coalescent longitudinally. Surface smoothish, 

 showing under the lens rather low growth-wrinkles and excessively 

 fine, unequal, close spiral striae, rendering it granulose above. Spire 

 conic, the apex somewhat obtuse, vermiculate-granose ; sutures 

 superficial, the last more rapidly descending and deflexed in front. 

 Whorls 5, weakly convex. Aperture very oblique, rather large- 

 ovate, white within and more or less distinctly showing the bands; peri- 

 stome not expanded, obtuse, the outer lip somewhat thickened with, 

 in, strongly arcuate above ; columella concave (straight in the young), 

 not folded, dilated and appressed above, leaving a slight umbilical 

 chink. Alt. 35, diam. 20 mill., sometimes smaller. 



Chili: Huasco (Cuming, Orb., Paz, Martinez), among rocks. 



Bulinus coturnix SOWB., P. Z. S., 1832, p. 30; Conch. Illustr., f. 

 3 (not good). Helix coturnix ORB., Mag. de Zool., 1835, p. 7. 

 Bulimus coturnix DESH. in Lam., An. s. Vert., viii, p. 264; and in 

 Fer. Hist., p. 93, pi. 150, f. 3, 4. ORB., Voy., p. 266. KEEVE, 

 Conch. Icon., pi. 19, f. 115. PFR., Conchyl. Cab., p. 215, pi. 60, f. 



