ZON1TES. 195 



striate, a little shining, yellowish corneous ; whorls 4J, subplanu- 

 late, increasing rapidly, base more convex. Diam. 15 mill. 



Athens, and Islands of Rhodes and Syra. 



H. NITELLTNA, Bourg. PI. 59, figs. 99-1. 



Narrowly nmbilicated, flattened above, more convex below, 

 diaphanous, shining, thin, decussated above by fine incremental 

 and spiral striae, greenish vitreous, below smooth, whitish ; 

 whorls 4^, somewhat rapidly enlarging, periphery obtusely angu- 

 lated. Diam. 13-15 mill. 



Rhodes, Syria, Palestine. 



Is possibly a variety only of the preceding species if so, 

 Bourguignat's name has 



H. SUTURALIS, Bottger. PI. 59, figs. 87, 97, 98. 



Yery narrowly perforate, thin, pellucid, very shining, orange 

 corneous, lighter on the base, becoming whitish; whorls 4^, 

 slightly striulate at the suture, somewhat rapidly enlarging, 

 suture smooth, superficial, narrowly white-margined. 



Diam. 7'25-7'5 mill. 



Suram Mts., Transcaucasia. 



Is perhaps not adult, as suspected by Bottger; when fully 

 grown would probably approach closely to H. Moussoni, Kobelt. 



H. MOUSSONI, Kobelt. PI. 59, figs. 2, 3. 



Xarrowly perforate, very lightly striulate, shining, thin, fragile, 

 diaphanous, yellowish corneous above, whitish below ; whorls 

 5, suture profound, last whorl dilated, subplanate above, more 

 convex below, aperture widely lunate, lip diffusely whitish. 



Diam. 19 mill. 



Near Constantinople. 



See remarks upon the preceding species. 



H. COMPLANATA, Desh. PL 59. figs. 78-80. 



Discoidal, thin, diaphanous, brownish, plane above, umbilicus 

 wide ; whorls a little convex, striate, the striae fading out at the 

 periphery. Diam. 13 mill. 



Hab. unknown. 

 H. DJURJURENSTS, Debeaux. PI. 59, figs. 81-83. 



Moderately umbilicated, planorbiform, fragile, depressed above 

 and below, shining, very thinly striate, corneous 3*ellow, whitish 



