HELIX- JACOSTA. 179 



suture, distinctly carinated at the periphery, thecarina rather thick, 

 transversely rugulose ; last whorl flattened beneath, slightly descend- 

 ing at the aperture. Aperture subpentagonal, little oblique ; per- 

 istome straight, slightly lipped with white within. 



Alt. 5i, greater diam. 7, lesser 6 mill. ; aperture, alt. 3, width 3i 



mill. (J/fe.) 



Southern Eubcea, near Stura, Greece. 



H. (Xerophila) biangulosa MTS., Archiv f. Naturg. 1889, p. 176, 

 t. 10, f. 11. 



Distinguished from H. syrensis mainly by the second keel on the 

 upper surface. 



H. GRADILIS Martens. PI. 44, figs. 80, 81, 82. 



Shell narrowly umbilicated, pyramidal, angulate, rather solid, 

 closely striated, white, painted with a few bands interrupted occa- 

 sionally with brown or diaphanous. Whorls 5, gradate, the first 

 smooth, white or pale brown, the rest flattened above, distinctly 

 angulated a little above the suture ; suture constricted ; last whorl a 

 little more convex below, slightly deflexed at the aperture. Aper- 

 ture slightly oblique, broad-ax-shaped; peristome straight, lipped 

 within, the outer and basal margins strongly arcuate, columella sub- 

 perpendicular, slightly dilated at the insertion. 



Alt. 52-6, greater diam. 8, lesser 7 mill. 



Island of Elasia, on the east coast of Crete. 



H. (Xerophila) gradilis MTS., Archiv f. Naturg. 1889, p. 187, 

 t. 10, f. 12. 



Separated from H. ledereri Pfr. by the much blunter keel, smaller 

 size, proportionally narrower umbilicus and weaker sculpture ; from 

 H. pyramdata Drap. by the regular elevation of the keel over the 

 suture, which is the same in all the specimens. (Ms.) 



H. CALYMNIA Martens. PI. 44, figs. 74, 75, 76. 



Shell subdepressed, moderately umbilicated, subtly radially striat- 

 ulate, white, painted with interrupted narrow brown bands. Spire 

 conical, subgradate ; whorls hardly 5, convex, separated by a deep 

 suture, the last whorl rounded, slightly descending in front. Apert- 

 ure subvertical, subcircular ; peristome straight, white-lipped within, 

 margins remote from one another, colurnellar margin arcuate, 

 scarcely dilated. 



Alt. 4i, greater diam. 6, lesser 4i mill. (Ms.) 



Island of Kalymnos. 



