HELIX. 247 



Ko belt makes it a distinct species, but Westerlund places it in 

 the synonymy of H. candicans. 



H. DERBENTINA, Andrz. PI. 60, figs. 24, 25, 15-17. 



Widely umbilicated, solid, lightly striulate, whitish, unicolored 

 or with interrupted chestnut bands, apex corneous, suture impressed; 

 whorls 6, convex, rather rapidly enlarging, the last slightly descend- 

 ing in front ; aperture white, peristonie white-lipped within. 



Diam. 18 mill. 



Caucasus, Crimea, Asia Minor. 

 Var. ISOMERIA, Friv. 



More depressed, whorls less inflated, umbilicus a little larger. 



Var. ARMENIACA, Bayer. 



More depressed and dilated, with scarcely prominent apex, with 

 sutural maculations confluent in an irregular band, umbilicus wider. 



Var. SUPRAZOKATA, Mouss. 



Smaller, somewhat depressed, with a dorsal and a sutural zone, 

 aud numerous inferior spiral lines. 



Var. SUBERRANS, Mouss. 



Smaller, a little more depressed, umbilicus deviately dilated, 

 whitish; obscure yellowish maculations beneath the suture, base 



variously painted with fulvous spiral lines. 



Merssina. 



Var. CAUCASICA, Parr. Figs. 15-17. 



Spire variable, somewhat elevated or depressed, white, without 

 bands. 



Caucasus. 

 H. KBYNICKII, Andrz. PL 60, figs. 18-21. 



Narrowly umbilicated, striulate, shining, white, variously orna- 

 mented by interrupted or continuous chestnut bands, apex corneous; 

 whorls 5i-6, the last inflated, sub-deviating in front; peristome 

 acute, white-lipped within. 



Diam. 16 mill. 



Crimea, and shores of the Caspian Sea. 



H. Babondubii, Parr, and H. Theodosioe, Clessin are synonyms, 

 and probably H. radiolata, Mousson is also identical; it was formerly 

 referred to H. vestalis, Parr, as a variety. 



Var. CANDAHARICA, Pfr. PL 60, figs. 22, 23. 



Moderately umbilicated, obliquely striulate, a little shining, 

 brownish white, with narrow, maculosely interrupted chestnut and 



