]()4 ( '0( 'II LOS 1Y LA-TOR ASIA. 



(4) GROUP OF C. THERSITES. 



i;..,lv- whorl acutely keeled in front, laterally compressed and dis- 



*" 



tnrtfl "ii its latter part, not descending toward the aperture. 



C. THERSI riss Broderip. PI. 21, figs. 11, 12, 13, 14. 



1 in pert< .rate, much depressed, very acutely carinated, solid; 

 whitish-yellow the apex white or purple-black, having usually four 

 dark-brown hands. Latter third or half of the body -whorl compressed 

 nt tit' i" 'i-ijihery, narrowing and distorting the whorl. Body-whorl 

 not descending in front. 



The surface is finely microscopically striate spirally; whorls 4f, 

 -carroly convex, the last acutely keeled, and its latter portion much 

 compressed, not descending. Aperture very oblique, subtriangular ; 

 peristome thickened, white or yellowish, broadly expanded; baso- 

 columellar margin of the lip white, adnate to the base nearly the 

 whole distance from axis to periphery. 



Alt. 15, greater diam. 32, lesser 23 mill. 



Calapan, Nan j an and Baco, Mindoro, Philippines. 



H. (Carocolla) thersites BROD., P. Z. S. 1841, p. 381. PFR., 

 Monogr. i, p. 299 ; Conchyl. Cab., p. 235, t. 112, f. 3, 4. Carocolla 

 thersites Rv., Conch. Syst. ii, t. 168, f. 9. H. thersites Rv., Conch. 

 Icon., f. IL'I'I. H. (Chlorcea) thersites HIDALGO, Obras Malacol. i, 

 p. 15(J, t. i>3, f. 5-9. * 



r rhe laterally flattened body-whorl, not descending in front, amply 

 distinguish this from all other forms of Chlorcea. 



The dark apex and stitural line are pretty constant, although one 

 specimen before me has the apex white. The other bands are very 

 variable, some or all of them being absent occasionally. 



Section II. CORASIA Albers, 1850. 



' \ra8ia A i.i;., Die Heliceen, 1850, p. 111. y. MART, in Albers, 

 I >i" Hel. -Jd. edit., p. 170. (Type H. virgo}. PFR., Nomencl. Hel. 

 Yiv., ].. 111'.). <',-ii*t>i11opsis ANCEY, Conchol. Exchange, ii, p. 23, 

 August, 1887, (types //. Im uteri, H. allisteri.} 



ImperfMnite (rarely perforate,) depressed-globose, often carinated ; 

 thin, Bubdiaphanoua ; whorls 3-'-5, rapidly widening, the last 

 icarcely descending; lip >li-htly expanded or narrowly reflex ed. 

 Surface in. ,iv or l-s striated spirally, lucking opaque or "hydro- 

 plan,., ' 1,,'irkinys. A natom y as in Cochlostyla generally. 



