STROPHOCHEILUS BORUS. 



This species differs much from oblongus in the aperture. The 

 cited figures (copied on pi. 11, figs. 55, 56) represent it broader and 

 shorter above than any of the specimens before me. Young examples 

 have a narrow umbilicus, and a small chink filled with earth 

 remains to be seen in many adults. (Martens^). 



S. ROSACEUS King. PL 5, fig. 26 ; pi. 6, figs. 29, 30. 



Shell oblong-ovate, rather thin, pinkish under a yellow cuticle, 

 the spire flesh-pink ; penultimate whorl more or less speckled or 

 zigzagged with whitish. Whorls 4?, the first planorboid, oblique to 

 axis, with deep suture, smooth ; the next whorl most minutely gran- 

 ular, with regularly crenulated suture ; following whorls having ir- 

 regular wrinkle-stria, and a dense, fine, but irregular decussate 

 granulation, the sutures somewhat irregularly crenulated. 



Aperture slightly over half the shell's length, ovate, fleshy-brown- 

 ish within ; peristome white, broadly reflexed, rather thin ; outer 

 lip evenly and well arched, columella concave below, oblique and 

 with a weak straightish entering fold above, its outer edge broadly 

 expanded, vaulted over the open (rarely closed) umbilicus ; parie- 

 tal callus light, transparent-whitish. 



Alt. 52, diam. 28 mill. ; aperture, alt. 29 mill. 



Alt. 62, diam. 30 mill. ; aperture, alt. 32* mill. 



Chiloe (Phil.) northward; Huasco (Bridges); Valparaiso; Co- 

 quimbo, Chili- Huanuco, Peru (Angrand) ; Cocapata, Bolivia. 



Bulinus rosaceus KING, Zool. Journ., v, p. 341. SOWB., Conch. 

 Illustr., f. 5 ; Beechey's Voy. Blossom, pi. 58, f. 15 ; Conch. Man., 

 f. 282. Bulimus rosaceus DESH., in Lam. An. s. Vert., p. 269 ; in 

 Fer. Hist., p. 36, pi. 139, f. 20-23. POT. & MICH., Galerie, i, p. 

 153, pi. 15, f. 3, 4. ORBIGNY, Voy. dans 1'Amer., Merid., p. 304, 

 pi. 34, f. 11, 12 (living animal). RYE., C. Icon., f. 87. PFR., 

 Monogr., ii, p. 52 ; Conchyl. Cab., pi. 68, f. 4, 5. HIDALGO, Viaje 

 al Pacif. p. 53. Martens, Novit. Conch., v, p. 21. MORELET, Ser. 

 Conch, iii, p. 170. 



S. CRENULATUS Pfeiffer. PI. 13, figs. 65, 66, 67. 



Shell oblong-ovate, rather thin, fleshy-buff, becoming flesh-colored 

 above, usually more or less mottled with white in zigzag pattern 

 throughout ; the cuticle very thin, persistent. Whorls 4?, the first 

 planorboid, with deep, smooth suture ; nepionic shell of nearly 2 

 whorls, densely spirally striated, the second and all subsequent 

 whorls with regularly, strongly crenulated sutures. Post-nepionic 

 3 



