COCHLOSTYEA-CANISTRUM. 43 



5, convex. Aperture very oblique, white inside, not showing the 

 band ; peristome white or pink, well expanded, arched forward 

 above. Columella white or pink, arcuate. 



Alt. 29, diam. 21 mill. 



Alt. 26^ diam. 21 mill. 



Mindoro, Philippines. 



Helix dumonti PFR. in Phil., Abbild. ii, p. 84, Helix, t. 7, f. 6 ; 

 Conchyl. Cab., p. 294, t. 49, f. 14, 15 ; Monogr. i, p. 229. Cochlo- 

 styla dumonti SEMPER, Reisen, Landmoll., p. 213. 



The dark peripheral line is inlaid in the surface of the shell, 

 leaving a shallow groove when worn away. The lip in one spec- 

 imen before me is of a delicate pink color. 



Section XIV. CANISTRUM Morch, 1852. 



Canistrum Kl., MORCH, Catal. Yoldi, p. 31 (for B. luzonicus, ovoi- 

 deus, stabilis). MARTENS in Alb., Die Hel., 2d. edit., p. 180 (type 

 C. luzonica Sow.). SEMPER, Reisen, p. 219. 



Ovate-conic or oblong shells, imperforate and solid ; banded ; 

 with or without hydrophanous cuticle ; surface microscopically 

 striated spirally. Whorls narrow. Lip well expanded, columella 

 vertical. 



Anatomically this section differs strikingly from all other Cochlo- 

 stylas which have been investigated, in lacking all accessary glands 

 upon the genitalia. A single species, C. stabilis, has been investi- 

 gated, but it may be expected that the other forms of Canistrum, 

 and probably Prochilus and Chrysallis also, will be found to share 

 this peculiarity. Morch was perfectly correct in including but three 

 species in Canistrum ; but all subsequent authors have enlarged the 

 group by the addition of incongruous material. 



C. OVOIDEA Bruguiere. PI. 5, figs. 13, 16 (typical), 10, 11, 12, 14, 

 15 (varieties). 



Imperforate, oblong-ovate, solid. White, with a peripheral black- 

 brown band, which ascends the spire above the suture, becoming 

 brown. 



Spire convex-conical, apex obtuse; whorls 6, slightly convex. 

 Aperture shorter than the spire, long-ovate, white and showing the 



