COCHLOSTYLA-PACHYSPH^RA. 175 



C. ILOCONENSIS Soweiby. PI. 39, figs. 97, 98, 99, 100. 



Imperforate, solid, high-globose, the altitude decidedly exceeding 

 the diameter. Color varying from light yellow to dark brown or 

 purplish-olive-brown, the lighter forms having two yellow or yellow- 

 ish-brown bands, or one yellow and one pink band ; the darker 

 forms having several lighter bands. Lip rather broadly or very 

 broadly reflexed, of a uniform white or pinkish tint. 



The surface is lightly obliquely striatulate ; whorls about 5, the 

 last a little descending and then slightly ascending at the aperture. 

 The aperture is oblique, white or pink inside. The lip is generally 

 broadly reflexed, both lip and columella white or light pink. The 

 columella is generally encircled by a pink tract. 



Alt. 31, diam. 23 mill. 



Alt. 20*, diam. 18 mill, 



Alt. 24, diam. 23 mill. 



Provinces of North and South Ylocos, Luzon, Philippines. 



H. iloconensis SOWB., P. Z. S. 1840, p. 116. PER., Symb. ii, p. 

 30 ; Conchyl. Cab., p. 301, t. 51, f. 1-4 ; Monogr. i, p. 223. REEVE, 

 Conch. Icon., f. 109. Cochlostyla iloconensis SEMP., Reis. Phil. Land- 

 moll., p. 197, t. 18, f. 10 (dentition.) 



Closely allied to C. annulata, but appreciably wider in the spire, 

 having a more broadly reflexed lip and probably never having 

 exactly the same color-patterns as that species. On many specimens 

 there are scattered dots of a pale or purplish tint (fig. 98.) 



All of the specimens I have seen, over 30 in number, maybe 

 referred to the following three color-varieties : 



(1) Var. heterotceniata. Shell very solid, light buff, having a 

 supra-peripheral yellow band and a subsutural pink band ; a streak 

 back of the broadly reflexed lip, and a circum-columellar patch 

 pink. Both of the bands are sometimes yellow. The apex is pink. 



(2) Var. xanthotceniata. Shell thinner ; lip much narrower, thin ; 

 pale yellow, having subsutural and peripheral bands of yellow. No 

 streak behind the lip, no columellar patch. The apex is white. 



(3) Var. intensior (fig. 100.) Shell solid, lip wide ; ground-color 

 olive-brown or purplish-brown ; light bands at periphery and suture, 

 darker bands in the usual positions, sometimes obsolete on the body- 

 whorl. Apex purple. 



