92 HELIX-CEPOLIS. 



(Subsection Gonostomopsis Pilsbry, 1889.) 



Chrysodon ANCEY, Conchologists' Exchange i, p. 54, April, 1887 

 (not Chrysodon Oken, 1815). 



H. AURIDENS Rang. PI. 49, figs. 71-73. 



Umbilicate, depressed, rather thin, slightly shining, dark chestnut 

 brown all over, with a few irregularly-scattered golden dots ; surface 

 very delicately striatulate, and sparcely hirsute, the hairs very short, 

 arranged in quincunx, and about millimetre apart, spire depressed, 

 nearly planorboid ; apex not rising above the succeeding whorl ; 

 sutures well impressed from the beginning ; whorls 4 to 4, convex, 

 the inner moderately, the last rapidly widening; body-whorl de- 

 pressed, rounded, a little descending anteriorly, indented around the 

 umbilicus ; aperture oblique, irregularly lunate, brown within ; 

 peristome narrowly expanded, brown, its terminations distant ; outer 

 margin straightened, bearing an acute tooth in the middle, its 

 position marked by a pit or scrobiculation outside the peristome ; 

 basal margin with a small tooth in the middle. Umbilicus rather 

 narrow, deep. Alt. 62-8, diam. 13-15 mill. 



Martinique. 



H. auridens RANG, Guerin's Mag. de Zool. 1834, t. 49. FEE., 

 Hist. t. 69 K, f. 8-12. PFR. Monogr. i, p. 412 ; Conchyl. Cab. p. 

 361, t. 64, f. 1-3. REEVE, f. 281. 



Separated from other species of Dentellaria by the open umbilicus 

 and peculiar aperture. The form of the aperture and whole aspect 

 of the shell forcibly recalls H. obvoluta Mull, of Central Europe, 

 and other similar species of the section Gonostoma. 



Section V. CEPOLIS Montfort, 1810. 



Cepolis MONTF. Conch. Syst. ii, p. 150. ALBERS-MARTENS, Die 

 Heliceen, p. 152 (1860). PFEIFFER-CLESSIN, Noment. Hel. Viv. 

 p. 175. Cepolum MONTF. Conch. Syst. ii, p. 151. 



The animal of Cepolis has not been observed. The principal 

 peculiarity of the shell is the deep scrobiculation of the base a short 

 distance behind the aperture, corresponding with a strong fold-like 

 tooth inside. I have united with this section the divisions called 

 Averellia and Angrandiella by Mr. Ancey, and have separated from 

 it a number of Asiatic forms which Pfeiffer places here. 



