COCHU >ST YLA-CHLOR^EA. 



(3) GKOUP OF C. PARADOX^. 



Bo<ly-wliorl obtusely or not obviously keeled, its latter half some- 

 what laterally compressed or flattened at the periphery ; descending 

 tntr.ird the <ij>ertnre; lip broad. 



Closely allied to the group of C. thersites, but with the last whorl 

 not acutely keeled, less distorted, and descending in front. 



1. Basal lip with a central strong tooth-like callus within; apical 

 and rnliunc/lar spots dark; no bands. C. parodoxa. 



2. Basal lip broad and straightened, without a central tooth ; apex 

 and c<>/iimella white; body-whorl 2-banded. C. constricta. 



3. Basal lip arcuate, narrower ; no color bands or spots. 



C. undina. 



C. PARADOX A Pfeiffer. PL 22, figs. 12, 13, 14. 



I m perforate, globose-depressed, solid, not obviously carinated; 

 \\v\\t vellow with a faint tinge of green, the apex blue-black, a large 

 spot at the insertion of the columella and a small one at the upper end 

 of the lip, dark brown; having a callous thickening at the middle 

 of the baso-columellar lip. 



Spire rather elevated, apex obtuse; whorls 5, the last somewhat 

 deflexed in front, obtusely carinated just above the upper insertion 

 of the lip, having a broad shallow constriction just behind the lip. 

 Surface lightly obliquely striated, and showing under a lens 

 excessively fine, close spiral stria?. Aperture very oblique ; lip 

 broadly reflexed, white; baso-columellar margin aduate, thickened 

 within, and having a broad tooth or callus in the middle. 



Alt. 13.], diam. 23 mill. 



Province of A Ibay, Luzon, Philippines. 



II. i>aradoxa PFR., P. Z. S. 1845, p. 39; Monogr. i, p. 267; 

 C..nehyl. Cub., t. 71, f. 1, 2. REEVE, Conch. Icon., f. 1419. 

 I'liiui-i'i, Abbild. u. Beschreib. i, p. 153, t. 4, f. 7. 



Distinguished from C. constricta by the absence of brown bands, 

 the whorl less deflexed toward the aperture, and the more prominent 

 callus or wid- tooth in the middle of the baso-columellar lip. The 

 lip is more broadly reflexed than in C. undina, and the columella 

 -traiirliter, more thickened within. 



Form immaculata (pi. LM, figs. 27, 28). Whitish, without dark 

 Bpota at apex and eoluinella, the aperture yellow within. 



