APPENDIX. 199 



above the middle, scarcely descending, lightly plicate below the carina, 

 very delicately sculptured with spiral and incremental striae ; aperture 

 lunate ; peristome vinous-brown, narrowly expanded and reflexed, 

 slightly dilated above the umbilicus, margins connected by a very 

 thin callous. (Smith.') 



Alt. 9 2, diam. maj. 18, min. 14? mill. 



This species is remarkable on account of the strongly plicate 

 upper surface which contrasts with the comparatively smooth 

 base ; the first two whorls, forming the top of the spire are smooth, 

 and the plicae gradually develop in thickness upon the remaining 

 volutions. Upon the last whorl they are interrupted by the pale 

 keel, and soon attenuate and become obsolete beneath it. The keel 

 passes right round the whorl, but does not modify the regular curve 

 of the labrum. 



The foot of the animal is of a vinous tint, and the mantle is con- 

 spicuously marbled with coal-black. (Smith.') 



Santa Lucia, W. I. 



Helix (Hadra) sanctcB-lucice SMITH, in Ann. and Mag. Nat. 

 Hist. 1889 (6th ser., vol. iii), p. 402. 



The subgeneric position of this species is not known to me. It is 

 certainly not a Hadra. 



NOTE. The first three members of the present volume, each con- 

 taining 64 pp. text and accompanying plates were issued on the 

 following dates: 1, April 17 ; 2, July 5 ; 3, Sept. 30. 



