34 OA5CILIO1DES OF GREECE AND WESTERN ASIA. 



and more descending, convexly flattened, the last half the total 

 length, elongate, cylindric in the middle, shortly tapering below. 

 Aperture vertical, very narrow; outer margin straightly descend- 

 ing, slightly arching forward, curving into the columella below. 

 Columella long, slightly excavated, abruptly, obliquely trun- 

 cate below, slightly margined with a delicate thread. Length 

 4, diam. 1.2 mm. 



Mesopotamia: drift debris of the Euphrates (type loc. ), and 

 of the Sarus river near Adana, S. -E. Asia Minor. 



Acimla (Cacilianella) minuta Mouss., Journ. de Conchyl. 

 1874, p. 39. Cadlianella (Aciculina) minuta BOETTGER, Nach- 

 richtsblatt D. Malak. Ges. 1905, p. 112, pi. 2 A, f. 4 a-d. 



According to Mousson, there are fewer whorls than in C. 

 adcula; the apex is larger and more obtuse, the last whorl is 

 more cylindric, and the remarkably narrow aperture has the 

 free margin descending in a straight line curving towards the 

 end of the columella and without surpassing it. The columella 

 is but slightly concave and is obliquely truncate at the base. 



The figures are copied from Boettger, and represent specimens 

 from the drift of the Sarus river, where this species is common. 

 He remarks that the examples vary quite noticeably in size but 

 normally it is 4 to 4.5 mm. long, 1.12 to 1.25 mm. wide. A 

 relative is C. subsaxana Bgt. , which perhaps may be a young 

 form of the same species. 



30. C. PR^ECLARA Westerlund. 



Shell long-cylindric, very slender, very glossy, very smooth, 

 hyaline, glassy, the spire much produced, a little obtuse. 

 Whorls 6 to 7, a little convex, the antepenultimate scarcely 

 twice the length of the preceding, the penultimate one-third the 

 total length, flattened dorsally, slowly tapering downwards; 

 suture a little impressed, conspicuously and narrowly margined, 

 deeply descending in the middle and below. Aperture long 

 piriform, acutely angular above, retuse below, parietal margin 

 long, straightish; columella short, a little arcuate, abruptly 

 truncate at the base. Peristome unexpanded, acute, simple, 

 the outer margin strongly arching forward in the middle, 

 receding at base. Length 5 to 5.5, diam. 1 mm. (Westerl. ) 



