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 5-i to 6-1, 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, diain. 31 mill. 



Alt. 48, diam. 26 mill. 



Alt. 67, diam. 35 mill. 



Mindoro, Philippines. 



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

 Bulimus mindoroensis PFR., Monogr. ii, p. 76 ; Conchy!. Cab., p. 

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

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

 (teste Pfr.). Bui. aspersus GRAT., Ibid., p. 421, t. 2, f. 8. Bui. 

 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 C. 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. ELECTRICA Reeve. PI. 15, figs. 3, 4, 5, 6. 



Perforate, ovate-turrite'd, rather solid. Surface nearly smooth, 

 somewhat wrinkled by growth-lines and having subobsolete fine 

 spiral strise. 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 



