COCHLOSTYLA-CHRYSALLIS. 53 



and irregular (fig. 70), sometimes narrow, close and parallel (figs. 

 71, 1, 2.) 



The spire is elevated, and either paler or darker than the body- 

 whorl. Apex obtuse, white or purple. Whorls 5J to 6J, slightly 

 convex, the last whorl convex. Aperture ovate, somewhat less than 

 half the entire length of the shell, white inside ; lip broadly 

 expanded and reflexed, dark purple-brown (rarely light flesh-brown). 

 Columella widely dilated, folded, its reflexed edge dark brown. 

 Parietal wall covered with a thin transparent callus, showing the 

 colors of the external surface. 



Alt. 64, diam. 31 mill. 



Alt. 48 ; diam. 26 mill. 



Alt. 67, diam. 35 mill. 



Mindoro, Philippines. 



Bulinus mindoroensis BROD., Proc. Zool. Soc. Lond., 1840, p. 84. 

 Bulimus mindoroensis PFR., Monogr. ii, p. 76; Conchyl. Cab., p. 

 202, t. 57, f. 4, 5. REEVE, Conch. Syst. ii,t. 173, f. 5 ; Conch. Icon, 

 t. 4, f. 15. Bal. wagneri GRAT., Actes Soc. Linn. Bord. ix, p. 164 

 (teste Pfr.). Bui. aspersus GRAT., Ibid., p. 421, t. 2, f. %.Bul. 

 melanogaster MORCH, Catal. Yoldi, p. 30. 



This species is allied in color pattern to C. chrysalidiformis var. 

 ustulata, but may readily be distinguished by its less wrinkled sur- 

 face, larger and wider aperture, less elongated, more rounded body- 

 whorl, etc. It differs from (?. electrica in having the parietal wall 

 colored like the exterior of the shell. 



Occasional specimens possess a dark peripheral girdle bordered 

 above with a light band (fig. 70). The B. aspersus of Grateloup 

 (pi. 14, fig. 69) has no differential characters. 



C. ELECTRIGA Reeve. PL 15, figs. 3, 4, 5, 6. 



Perforate, ovate-turrited, rather solid. Surface nearly smooth, 

 somewhat wrinkled by growth-lines and having subobsolete fine 

 spiral striae. Ground-color dark chestnut, covered with a thin but 

 even coat of brown cuticle, which is more or less variegated by 

 narrow lightning streaks of cream-white accompanied by dark 

 streaks ; periphery begirt with a dark girdle (rarely obsolete) ; um- 

 bilical tract dark also, denuded of hydrophanous cuticle. 



Spire conical, apex obtuse; whorls 6, slightly convex, the last 

 whorl convex. Aperture half the total length of the shell or some- 

 what less, white inside ; lip broadly and flatly expanded, dark 



