COCHLOSTYLA-CHLOIkEA. 99 



Conch. Icon., f. 96. PHILIPPI, Abbild. i, p. 78, Helix, t. 4, f. 6. 

 HIDALGO, Journ. de Conchyl. 1887, p. I21--Cfilorcea sirena v. 

 MOLL., Landschn. Fauna Cebu, p. 226 (var. cebuana.") 



Subglobose, with the whorl less deflexed in front than most species 

 of Chlorcea. It is very variable in coloring. 



Typical sirena (figs. 16, 17, 18) has a cream colored or light 

 greenish ground-color, with a single band above the periphery, 

 which is brown on the spire, becoming purplish, green or blackish- 

 green on the body-whorl. There are often dots of translucent-gray- 

 ish scattered over the surface. 



Var. cebuana v. Moll. Smaller, a little higher, last whorl not at 

 all angulated, more inflated below ; color dull green, with a pale 

 greenish peripheral girdle, bordered above and below with narrow, 

 dark green bands. 



Island of Zebu. 



Var. guimarasensis Pils. (fig. 15). Larger than the type, dis- 

 tinctly angular in front, unicolored yellow, paler toward the white 

 apex. Alt. 161, diam. 26 mill. 



Island of Guimaras. 



C. PELEWANA Mousson. PI. 22, figs. 10, 11. 



Imperforate, orbiculate-depressed, striate, sculptured all over with 

 undulating oblique and subspiral w r inkles ; shining, white, painted 

 above with 3 or 4 interrupted blackish-brown lines. Spire obtuse, 

 depressed, the nucleus roseate, polished ; suture simple, subimpressed. 

 Whorls 3i, rapidly increasing, a little convex, the last obtusely car- 

 inated, abruptly descending at the aperture and somewhat narrowed ; 

 at the base rather convex. Aperture oblique (inclined at 60 degrees 

 with the axis), transverse lunate-subcircular, the bauds visible inside ; 

 peristome acute, expanded, white, sublabiate inside, margin little 

 approaching, joined by a pale, thin callus ; right margin expanded, 

 arcuate, columellar margin very oblique, broadly and obtusely 

 thickened, flatly expanded above, adnate. 



Alt. 13, diam. 19 mill. (Mouss.') 



Pelew Is. 



H. pelewana Mouss., Journ. de Conchyl. 1869, p. 58, t. 4, f. 2.- 

 Chlorcea pelewana PSE., P. Z. S. 1871, p. 474. 



The fauna of the Pelew group is essentially Polynesian, the 

 occurrence of this and a few other western forms being quite excep- 



