( '<)< TILOSTYLA-CALOCOCHL.EA. 135 



H. f estiva DONOVAN, Naturalist's Repository iii, pi. 103 (Feb., 

 1825). PFR., Monogr. iii, p. 187; Conchyl. Cab. t. 139, f. 19, 20. 

 RVE., Conch. Icon. f. 107. H. luzonica SOWB. (in sched. Cum- 

 ing), PFR., Monogr. i, p. 252 ; Conchyl. Cab. t. 45, f. 7, 9, 10, 11. 

 RVE., f. 41. SEMPER, Reis., t. 8, f. 1. H. annceO. SEMPER, Journ. 

 de Conch. 1862, p. 146, t. 5, f. 8, $. Cochlosty la j estiva SEMP., Reis. 

 p. 176. HIDALGO, Journ. de Conchyl. 1887, p. 127. 



Fig. 25 of pi. 52 is the typical f estiva. On pi. 35, figs. 11, 

 12 represent the C. annce Semper ; the figures 13-16 are the form 

 luzonica Sow. 



This species has less variegated cuticle than C. pulcherrima and 

 the white equatorial zone is conspicuous. The lip is heavier than in 

 pulcherrima ; its face is typically pink, but many specimens have a 

 pure white lip and columella. 



C. DUBIOSA Pfeiffer. PI. 32, figs. 52, 54. 



Imperforate, globose-depressed, rather thin but solid. Ground- 

 color under the hydrophanous cuticle, varying from yellow to brown, 

 and having two dark chestnut zones, one above, the other below the 

 periphery. Covered with a cream-white hydrophanous cuticle, 

 which is cut into a great number of very fine lines by fine close darker 

 spiral lines. 



The surface is finely spirally striated. Whorls 4, the last a lit- 

 tle descending in front. Aperture rounded, white and showing the 

 zones within ; lip broadly reflexed, thin, white ; columella nearly 

 straight, white, forming an obtuse angle at its base with the lower 

 lip. 



Alt. 30, diam. 31 mill. 



Mts. of Morong district, Luzon, 



H. dubiosa PFR., Symbolse iii, p, 71 ; Conchyl. Cab. t. 46, f. 5, 

 6 ; Monogr. i, p. 252. RVE., Conch. Icon. f. 22. H. decipiens var. 

 DELESSERT, Req. de Coq. t. 38, f. 10. Cochlostyla dubiosa HIDALGO, 

 Journ. de Conch. 1887, p. 145. H. batanica RVE., Conch. Icon. t. 

 9, f. 2. H. volubilis Rv. Errata to Conch. Icon. Cochlostyla 

 batanica HIDALGO, Journ. de Conchyl. 1887, p. 129. H. speciosa 

 JAY, Catal. (2nd edit.), plate iii, f. 9, 9 (1836). 



The most prominent feature of this species is its thin, broadly ex- 

 panded lip, yellow-brown ground-color two-banded with chestnut, 

 and the excessively fine and numerous lines of hydrophanous cuti- 

 cle of the exterior. 



