ORCULA. 35 



The more slender form described by Retowski may be con- 

 sidered typical of the subspecies. Sturany has noted it from 

 Siehe, in Bulghar-Dagh, and Karagol, Bulghar-Maaden, at 

 1500 to 1600 meters, in the Erdsahias-Dagh, Asia Minor. He 

 figured long and short examples: 1.4x2 to 6.5x2.3 mm. are 

 given as extremes, whorls from iy 2 to 9. 



The specimens from Siwas, Tokat Vilayet, drawn in our 

 plate, measure up to 6.3 mm. long, 2.2 wide, with 8y 2 whorls. 

 They are brown, with a wide opaque white tract behind the 

 peristome, and a crest, weak to strong, as shown in the 

 profile view. The last whorl is somewhat flattened and taper- 

 ing to the base. Spaced cuticular riblets such as typical 

 doliolum has, are wanting. The lip is rather broadly re- 

 flected. A distinct angular tubercle united with the lip-inser- 

 tion. The parietal lamella is remote from the edge of the 

 callus and quite low as seen in the mouth; deep within, on 

 the left side, it becomes very high. The columellar lamella 

 becomes very strong within the left side, where also the supra- 

 columellar is represented by a smaller lamella, not connected 

 with the very weak one on the columella. These lamella? are 

 exactly as in O. mesopotamica. There is a quite short lower- 

 palatal fold within the left side (fig. 10, p.), visible exter- 

 nally as a light spot immediately to the left of the aperture, 

 above the umbilical crevice. 



A smaller form of Asia Minor may be attached to batu- 

 mensis as var. enteroplax, n. v., the type from Brussa (pi. 3, 

 figs. 11-13). The internal structure is as described for batu- 

 mensis, the parietal lamella being low in front, very large 

 within. Columellar lamella prominent in a front view, where 

 no supracolumella is visible. Palatal fold short, lateral. Ex 

 terior brown, white behind the lip, finely striate, without the 

 spaced riblets of doliolum. Terminal cone is very short. Lip 

 is rather heavily calloused. Length 5.1, diam. 2.1 mm.; 8 

 whorls. 



A form from Amasia is similar except that the columellar 

 lamella does not emerge, and is visible in an oblique view in 

 the mouth only as a blunt prominence or angulation. In- 

 ternal structure as in enteroplax. Length 5.4, diam. 2.1 mm. ; 



