CARACOLUS. 263 



Helix (Dorcasia) gypsina M. & P., Ann. Mag. N. H. (6), viii, 

 p. 238 (Sept., 1891) ; ix, t. 4, f. 10. 



We consider this sufficiently to differ from H. namaquensis^tloQ 

 shell being of decidedly less delicate substance, more compact, and 

 of a chalky whiteness; the mouth less effuse and distinctly ovate- 

 depressed at the base. It is also considerably smaller ; nor is the 

 slight malleation, so noticeable in the last whorl of that species, to be 

 found in H. gypsina. (M. & P.) 



Unfigured species. 



HELIX COAGULUM Martens, Sitzungs-Bericht Ges. Naturf. Freunde 

 zu Berlin, 1889, p. 160. Great Namaland. Near H. globulus. 



HELIX CERNUA Martens, 1. c., p. 161. Great Namaland. Allied 

 to lucana, kraussi and alexandri. 



Genus CARACOLUS Montfort. (Vol. V, p. 75.) 

 Section LUCERNA Swains. (Vol. V, p. 97.) 



C. SLOANEANA var. VENDRYESi Cockerell. Vol. IX, pi. 25, figs. 6, 7. 



Shell more depressed than usual, and distinctly, rather acutely car- 

 inated. Color dark purple-brown, blackish on the spire, the lip 

 lighter. Alt. 13, diam. 27 mill. 



Montego Bay, Jamaica. 



Helix (Lucerna') vendryesi CKLL., Journal of the -Institute of 

 Jamaica i, p. 55 (Feb., 1892.) 



This form differs from depressed specimens of sloaneana only in 

 the somewhat more acute carina and the much darker color. My 

 figures are from one of the original lot, several of which were kindly 

 sent me by Mr. Cockerell. 



Section LABYRINTHUS Beck (Vol. V, p. 159.) 

 C. SIEVERSI Martens. Vol. IX, pi. 25, figs. 7, 8. 



Shell covered perforate, globose-conoid, solid, minutely granulated, 

 unicolored. Spire wide-conoidal, rather obtuse. Whorls 5, slightly 

 convex, slowly increasing, the last rounded, deflexed in front, strang- 

 ulated and scrobiculate. Aperture very oblique, ear-shaped ; per- 

 istome somewhat thickened, reflexed, the margins joined by a distinct 

 appressed callus ; right margin deeply curved, 2-toothed, basal mar- 

 gin with two denticles. 



