180 HELIX-JACOSTA. 



H. (Xerophila) calymnia MTS., Archiv fiir Naturg. 1889, p. 

 t. 10, f. 9. 

 Described from a single specimen. 



H. EMINENS Westerlund. PI. 27, figs. 75, 76 ; pi. 44, figs. 2, 3, 4 



{exserta Mts.) 



Shell trochoidal, scalariform, the peripheral keel strongly projecting 

 above the suture; umbilicated, the umbilicus about one-ninth the 

 diameter of the shell. Color buff-white ; surface closely ribbed- 

 striate all over. 



Spire much elevated, the apex obtuse ; first whorl corneous, shin- 

 ing, convex ; carina beginning to project about the middle of the next 

 whorl, becoming more and more prominent ; the last whorl convex 

 above and below, compressed on each side of the median keel. 



Aperture transversely oval, not lunate, somewhat angled out- 

 wardly; peristome thin, margins strongly converging, not much 

 thickened within. 



Alt. 6, diam. 7 mill. 



Alt. 5, diam. 6 mill. 



Island of Syra, Greece (Spratt.) 



H. eminens WEST., Fauna Pal. Reg. Binnenconch., p. 324, (1889). 

 H. syrensis var. exserta MARTENS, Archiv fiir Naturgeschichte 

 1889, p. 183, t. 10, f. 13 (August, 1889.) 



I do not know which of the names for this form has priority, both 

 being published in 1889, and both founded upon specimens from 

 Syra collected by Spratt. I am indebted to Mr. Ponsonby for spec- 

 imens. 



H. AMPHICONUS Maltzan. PI. 40, figs. 65, 66, 67. 



Shell quite narrowly perforate and depressed, distinctly carinated, 

 low conical above and below, closely and roughly ribbed striate, the 

 riblets running into the umbilicus below ; gray-white, indistinctly 

 banded or flecked with brown above, below having two distinct, 

 broad chestnut-brown bands, which are generally interrupted by 

 white dots, and sometimes having a narrow brown line between ( 

 them. The spire is only a little elevated, the apex small, black- 1 

 brown ; there are five slowly increasing whorls, surrounded by a 

 strong thread-like projecting keel upon which the riblets project 

 sharper but rounded ; the last whorl is slightly wider, compressed 

 upon each side of the keel, somewhat swollen around the perforation, 

 very slightly descending in front. Aperture small, compressed, 



