D COCHLOSTYLA-ORTHOSTYLUS. 



C. MUS Broderip. PL 1, figs. 1, 2. 



Imperforate, ovate-conoid, solid. Ground color reddish-brown, 

 becoming light on the spire ; covered with a white or cream-white 

 hydrophanous cuticle which would be uniform except that it is 

 usually much worn into oblique streaks, often having some spirals 

 near the periphery. Aperture as long as the spire. 



The spire is bluntly conoidal, apex obtuse; whorls 5J, the last a 

 little descending in front. Aperture quite oblique, white or deli- 

 cate lilac inside ; peristome thick, reflexed, edged with dark brown ; 

 columella wide, white, arcuate above, obliquely truncated below. 



Alt. 48, diam. 35 mill. ; oblique alt. of aperture 29 mill. 



Philippines. 



Bulinus mus BROD. (in sched. Cuming) DELESSERT, Recueil, t. 

 39, f. 12. REEVE, Conch. Icon. f. 10. PFR., Conchy 1. Cab. Bui. t. 

 52, f. 5, 6; Monogr. ii, p. 17. 



It is a much less conoidal, narrower shell than C. ticaonica, wider 

 than C. leucophcea. The oblique altitude of the aperture is about 

 equal to or exceeds the length of the spire, whilst in C. leucophcea 

 the spire is decidedly longer. 



C. LEUCOPH.EA Sowerby. PL 1, figs. 7, 8. 



Imperforate, ovate-conoidal, solid. Ground color dark brown, 

 becoming yellowish on the spire, then whitish, the apex faint brown ; 

 covered with a white or brownish hydrophanous cuticle which shows a 

 blackish band at the periphery, and usually an irregular series of 

 eroded spots above, somewhat as in C. fenestrata and C. curia. 



Spire elevated, obtuse ; whorls 6, the last slightly or not descend" 

 ing in front. Aperture oblique, white inside ; peristome thick, 

 reflexed, brown-edged ; columella wide, white, obliquely truncated 

 below. 



Alt. 47, diam. 30 mill. ; oblique alt. of aperture, with peristome 

 25 mill. 



Alt. 44, diam. 28 mill. 



S. Nicolas, Nueva Ecija and Candon, Ylocos, Luzon, Philippines. 



Helix leucophcea Sow., P. Z. S. 1841, p. 18. DELESSERT, Rec- 

 ueil t. 39, f. 1. REEVE, Conch. Icon. Bui. t. 10, f. 50. PFR., 

 Conchyl. Cab. Bui. t. 52, f. 4 ; Monogr. ii, p. 5. Cochlostyla (Ortho- 

 stylus') leucophcea SEMPER, Reis. Landmoll. p. 206, t. 13, f. 5 ; t. 

 18, f. 20 (anatomy). 



