COCHLOSTYLA-CHLOR^A. 103 



C. CONSTRICTA PfeifFer. PL 22, figs. 16, 17. 



Imperforate, globose-depressed, solid not carinated ; yellow-white, 

 the apex white, body-whorl encircled by two chestnut-brown zones, one 

 above, the other below the rounded periphery, the upper one ascend- 

 ing the spire ; lip white or yellow within ; baso-columellar lip 

 straightened, thickened, not toothed within. 



Spire rather elevated, apex obtuse; whorls 4?, the last deeply de- 

 flexed toward the aperture, sometimes a little angular just above the 

 upper termination of the lip, broadly constricted behind the lip. 

 Surface obliquely striatulate, microscopically, densely, spirally, 

 striated. Aperture very oblique, oval-triangular ; lip very broadly 

 reflexed ; baso-columellar lip adnate, wide, thickened within, but 

 without a callus or tooth in the middle. 



Alt. 14J, diam. 22J, mill. 



Alt. 12, diam. 19 mill. 



Mindoro, Philippines. 



H. constricta PFR., P. Z. S. 1845, p. 39 ; Conchyl. Cab., t. 69, f. 

 21, 22 ; Monogr. i, p. 267 (not H. constricta Boub.). H. restricta 

 PFR., Mai. Bl. 1854, p. 258; Monogr. iv, p. 228. H. stenopsis 

 .-TAND., Kev. et Mag. deZool. 1856, p. 563. Chlorcea constricta 

 >EMPER, Reis. Phil. Landmoll. iii, p. 228. 



Allied to C. paradoxa, but having the last whorl more deflexed in 

 front, and the baso-columellar lip without a central callous or 

 >oth. 



!. UNDINA Pfeiffer. PI. 22, figs. 8, 9. 



Imperforate, globose-turbinate, thin, smooth, shining, whitish- 

 hyaline ; spire convex-conoid ; whorls 5, a little convex, the last 

 lorter than the spire, slightly deflexed in front ; periphery obsoletely 

 mgulated, base rather flattened. Aperture very oblique, truncate- 

 elliptical ; peristorne thin, margins subconniving, the right margin 

 expanded, columellar lightly arcuate, flat, appressed. 

 Alt. 14J, greater diam. 23, lesser 19 mill. (Pfr.) 



Philippine Is. 



H. undina PFR., P. Z. S. 1856, p. 34; Novit. Conch, i, p. 77, t. 

 51, f. 10-12 ; Monogr. iv, p. 208. 



Columellar lip more arcuate than in the two preceding species, 

 'he shell before me is rather solid, and the lip is broader than 

 hown in Pfeiffer 's figures. 



