134 ORCULA. 



summit (4 whorls) bluntly conic. Whorls 8, almost flat, 

 gradually increasing; protoconch (1% whorls) engraved to the 

 apex with close, regular, microscopic spiral grooving, re- 

 mainder sculptured with fairly close and regular, slightly 

 curved and oblique transverse striae. Suture simple, shallow. 

 Aperture subquadrate, rounded at the base ; peristome white, 

 glossy and reflexed. Dentition 7-fold: an acute, deeply in- 

 running lamella on the center of the paries, with two large, 

 rounded tubercles, thickening outwards in the direction of, 

 but not touching, the ends of the peristome; two prominent 

 inrunning lamellae, arising on the outer margin of the colu- 

 mellar lip, one-half and three-fourths way up the columella, 

 and two narrower ones deepset above them; columella erect, 

 margin rather narrowly reflexed" (Connolly). 



"Long. 6.3, lat. 2.7; apert. alt. 1, lat. 1; last whorl 3.5 mm." 

 Tripoli: Cyrenaica north of Merj (/. W. Oregory). 



Orcnla tomlini Connolly, Ann. Mag. N. H., 10 ser., vol. 8, 

 p. 305, pi. 10, fig. 1. Type in Tomlin collection. 



"Two specimens, the second measuring 6 mm. in length 

 and lacking one of the smaller immersed lamellae at the top 

 of the columella. The feature which appears to separate this 

 species from all other known Orculae is the presence of the 

 small tumuli on the paries; they are exactly similar in both 

 examples, and can hardly represent an ordinary callous pro- 

 cess, since, despite their size, they neither connect with the 

 parietal lamella nor with either end of the peristome. Some- 

 thing of this kind is present on 0. orientalis var. nitida Mouss. 

 and 0. moussoni Reinh., both from Aleppo, but the tubercles 

 are smaller and are connected with the margins. In Orcula 

 tomlini the two lower columellar lamellae are extremely con- 

 spicuous. 



"I have much pleasure in naming this beautiful species in 

 honor of its owner, in grateful recognition of the courteous 

 and ever-ready help and advice in many branches of science, 

 for which countless students besides myself are indebted to 

 him" {Connolly). 



