10 BULIMULUS-PLECTOSTYLUS. 



B. OCHSENII (Dunker). PI. 8, figs. 28, 29. 



Shell imperforate, ovate-conic, thin, striatulate and under the lens 

 very lightly granulate-decussate. Buff, ornamented with narrow 

 dark streaks and sometimes chestnut spots. Spire a little convexly 

 conic, the apex subacute ; suture very delicately denticulate. Whorls 

 5, slightly convex, the last somewhat attenuated below. 



Aperture oblique, acuminate-oval, a little longer than the spire ; 

 peristome simple, unexpanded, chestnut edged ; columella white 

 above, receding, thread-like. Alt. 25, diam. 12 mill. ; aperture 15 

 mill, long, 7 wide. (P/K). 



Province of Valdivia, Chili (W. Ochsenius) ; Santiago de Chile 

 (Paz). 



Bulimus ochsenii DUNKER, Malak. Bl., ii, 1855, p. 107. PFR., 

 Monogr., iv, p. 449. HIDALGO, Journ. de Conch., 1870, p. 55; 

 1875, p. 128, pi. 7, f. 2. Bulimus arbustorum PHIL, in litteris. 



A smaller shell than B. reflexus, but so far as the published de- 

 scription and figures go, offering no other distinctive characters 

 unless ochsenii proves to have no streakless columellar tract. 



B. COQUIMBENSIS (Broderip). PI. 8, figs. 14, 15, 16, 17. 



Shell iraperforate, ovate or oblong-ovate, rather thin. Whitish, 

 closely speckled throughout with chocolate- brown dots and small 

 blotches. Surface smoothish, under the lens showing irregular 

 growth-wrinkles and very superficial, subobsolete spiral striae, which 

 become stronger toward the upper part of the whorls, producing a 

 distinct and irregular granulation below the sutures. Spire conic, 

 the apical whorls showing a very superficial vermiculate or netted 

 pattern. Whorls 5 to 5, weakly convex. 



Aperture somewhat oblique, slightly or much exceeding half the 

 shell's length, variegated within ; peristome thin, simple ; columella, 

 concave below, with a long, feebly spiral fold above. 



Alt. 40, diam. 19 mill. ; alt. of aperture 21 mill. 



Alt. 38, diam. 20 mill.; alt. of aperture 24 mill. 



Coquimbo, Chili (Cuming, Paz and Martinez). 



Bulinus coquimbensis BROD., P. Z. S., 1832, p. 30. Sows., Conch. 

 Illustr., f. 8. Helix coquimbensis ORB., 1835. Plectostylus coquim- 

 bensis BECK, Index, p. 58. Bulimus coquimbensis DESH. in Lam.,, 

 viii, p. 264; and in Fer., Hist., pi. 139, f. 8-10. POT & MICH., 

 Galerie, i, p. 136, pi. 12, f. 15, 16. ORB., Voy., p. 267. PFR., 

 Monogr., ii, p. 147 ; Conchyl. Cab., p. 212, pi. 60, f. 1, 2. REEVE, 



