22 ORCULA. 



rounded. One strong and very arcuate median lamella 

 above ; two immersed columellars, the lower robust and ar- 

 cuate. Peristome expanded, reflected, a little thick. Shell 

 corneous-reddish, ornamented with fine, little marked, quite 

 spaced stria?. Length 4%, diam. 2% mm. Rare ; Santa-Clara, 

 vallee de Cairos, pres Saorgio (Alpes-Maritimes). 



Orcula doliolum var. tumida Vohland. Shell globose-cylin- 

 dric, much more inflated than the type, with small, oblique 

 umbilical crevice. The ribbing (only exceptionally well pre- 

 served), sharp, regular. "Where the shell is worn a very fine 

 striation shows. Whorls only 8 (against 9 or 10 in the type), 

 the greatest thickness more towards the middle, then rapidly 

 diminishing, much more closely coiled. Last whorl rising 

 strongly towards the aperture, which is like the type. Length 

 4, diam. 2.5 mm. Pleistocene of the Wilden Sau, flowing into 

 the Elbe below Dresden. (Vohland, Sitzungsber. u. Abh. 

 nat. Ges. Isis, in Dresden, for 1910, p. 126; 1911.) 



The Sicilian form of doliolum (0. d. var. templorum, pi. 2, 

 fig. 3, Catania) is very close to the typical form. It has no 

 angular tubercle and the columellar folds emerge only far 

 enough to be visible from in front. Shell light brown. The 

 early neanic stage has been described as Helix templorum 

 Benoit, from the temple of Selinunte in southern Sicily. He 

 also figured Sicilian 0. doliolum on his pi. 5, f. 19, but did 

 not reach this species in the text. 



Dr. Boettger reports the form from Schah-rud, Prov. Irak 

 Adschmi in northern Persia, as similar to that of the Talysch, 

 brownish-yellow, the whorls more weakly convex than in the 

 type, a distinct angular nodule, two columellar lamellae; lip 

 very thick, callous, white. Length 5.5, diam. 2.5 mm. 



Form unifilarw (Boettger). Dr. Boettger writes (Jahrb. d. 

 m. Ges., vi, 32) of Caucasian doliolum that in the narrow 

 form (compared to German examples) of Mamudly, 2-2 1 / 4 

 mm. in greatest diam., and the strongly elongate, rather nar- 

 row examples of Zalka ( 6 x 2% mm. ) all of the many speci- 

 mens show only one columellar lamella. Of the specimens 

 equal to the German in width, also numerous from Kasbek 

 (2 1 / 4-2 1 /2 mm. diam.), two-thirds are provided with one, only 

 one-third with two columellar lamella?. In all Caucasian ex- 

 amples before me, he continues, the sculpture appears some- 

 what weaker in adults than in those of Germany and Sicily. 



