50 COCHLOSTYLA-PROCHILUS. 



C. PARTULOIDES Broderip. PI. 16, figs. 20, 21, 22, 23, 24. 



Narrowly perforate, ovate-pyramidal, the spire straight-sided. 

 Whorls nearly 6, slightly convex. Aperture ovate, somewhat 

 oblique; peristome broadly, flatly expanded, white, its reverse 

 white. Colurnella wide, reflexed, distinctly truncated at the base. 

 Color yellowish, banded with black-brown, or dark chestnut with a 

 white sutural band. Alt. 34, diam. 18 mill. 



Tablets and Mindoro, Philippines. 



Bulinus partuloides BROD., P. Z. S., 1840, p. 181. Bulimus par- 

 taloides REEVE, Conch. Icon. t. 11, f. 54. PFR., Monogr. ii, p. 42. 



I am in doubt whether this is more than a variety of C. dryas, 

 although the more typical forms, such as are represented in figures 

 23, 24, are readily distinguishable by their small size, abruptly 

 truncated columella, etc. 



C. NIGROOINCTA Semper. PI. 13, fig. 62. 



Perforate, conic-ovate, solid, smooth, shining, white, ornamented 

 with black chestnut bands. Spire conical, tawny above, the apex 

 obtuse. Whorls 5, nearly flat, the last a little shorter than the 

 spire, carinated in the middle, the keel disappearing anteriorly ; 

 base rounded. Aperture subvertical, truncate-oval; peristome thin, 

 right margin sinuated above, then rather widely spreading; col- 

 umellar margin straightly ascending, vaultingly reflexed. (Pfr.) 



Alt. 30, mill. 16 ; aperture with peristome, alt. 15, width 12 mill. 



Philippines. 



Bulimus pan PFR., P. Z. S., 1861, p. 23, t. 3, f. 5 ; Novit. Conch. 

 p. 163, t. 44, f. 6, 7 ; Monogr. vi, p. 29 (not Helix pan BROD. 1841, 

 also a Cochlostyla). Cochlostyla nigrocincta SEMPER, Reisen, p. 221. 



C. MERCURIUS Pfeiffer. PI. 10, figs. 12, 13. 



Perforated, ovate-conic, solid, shining (minutely decussated under 

 a lens), tawny-white, ornamented with wide chestnut bands ; spire 

 turrited-conic, rather acute. Whorls 6, a trifle convex, the last 

 about three sevenths the entire length ; base rounded ; columella 

 substraightened. Aperture little oblique, truncate-oval; peristome 

 simple, narrowly expanded, the columellar margin vaultingly 

 reflexed. (P/r.) 



Alt. 36, diam. 18; aperture alt. 16, width (inside) 9 mill. 



Habitat unknown. 



