COCHLOSTYLA-COCHLODRYAS. 179 



(3). Green and white streaked, sutural band white, having two 

 brown zones around the middle, the upper ascending the spire, the 

 columellar patch dark. There is often an additional brown line or 

 band below the white sutural band (figs. 77, 78). 



(4). Green largely replaced by reddish brown (fig. 75), or by 

 blackish-brown (fig. 74). Sometimes greenish-black, 



C. ORBITULA Sowerby. PL 58, figs. 98, 99. 



Imperforate, ovate-globose, thick and solid, smooth ; light straw- 

 colored with bands of brown and green, the former retained, the 

 latter lost when the epidermis is removed. The suture has an 

 opaque white margin below, about 1* millim. wide on the last whorl. 



Spire dome-shaped ; apex obtuse ; sutures superficial. Whorls 5 

 to 5J, slightly convex, the last slightly descending in front. Aper- 

 ture rather small, oblique ; lip expanded, reflexed, white ; columella 

 heavy, slightly arcuate, rarely dentate below. 



Alt. 30, diam. 26 mill. 



Alt. 26, diam. 26 mill. 



Mindoi'o, Philippines. 



H. orbitula SOWB., P. Z. S. 1840, p. 103. PFR., Monogr. i, p. 

 224 ; Conchyl. Cab., p. 296, t. 50, f. 7, 8. REEVE, Conch. Icon., f. 

 60. DH. in Fer., Hist, i, p. 311, t. 108 A, f. 7, 8. H. chlorogrammica 

 VAL., in Paris Mus. 



The shell agrees with C.florida and C. polychroa in possessing a 

 white margin below the suture, but it is much more compact and 

 solid than either of these species. It is a more solid shell than C. 

 tenera. 



The coloring is very variable. There are generally (?) two chest- 

 nut-brown bands, one of which ascends the spire, but these are often 

 lacking on the body-whorl. The green may either cover most of 

 the body-whorl, or be restricted to a narrow band or two. 



C. TENERA Sowerby. PI. 36, figs. 31, 32. 



Imperforate, globose-conic, thin, smooth ; white, ornamented with 

 blackish and green bands; subhyaline; spire depressed-conoid. 

 Whorls 4J, a little convex ; columella almost straight, thin, 

 excavated ; aperture lunate-rounded ; peristome simple, little ex- 

 panded. Alt. 20, greater diam. 25, lesser 21 mill. (Pfr.) 



Mindoro and Tablas, Philippines. 



