148 PYRAMIDELLID^. 



could he not say grooved instead of '^ snlcated/^ length- 

 wise and not ^^ longitudinally/^ and for "undulated^' 

 wavy ? and how do the whorls (or " volutions/'' as he 

 calls them) " oblique towards the suture ? " 



B. Turhonilla or Chemnitzia. 

 21. O. clathra'ta"^^ Jeffreys. 



0. dathrata, Jeffr. in Ann. & Mag. N. H. 2nd ser. ii. p. 345 ; F. & II. 

 iii. p. 258, pi. xciv. f. 4. 



Shell cylindro-conical, solid, opaque, and not so glossy as 

 most of its congeners : sculpture, somewhat flexuous, strong 

 and flattened longitudinal ribs, of which there are about 20 on 

 the body-whorl, extending to the base ; their interstices are 

 of the same breadth as the ribs, and crossed by short transverse 

 stria3 or much smaller ribs, of which there are 3 rows on the 

 last whorl, and 2 on each of the upper whorls ; these trans- 

 verse striae occupy the middle or greater part of the last whorl 

 and the lower half of each of the other whorls ; the topmost 

 or apical whorl is smooth: colour white, in one specimen 

 stained with pale reddish-brown : spire elongated and tapering 

 to an abruptly pointed extremity ; nucleus raised on one side 

 and twisted inwards : whorls 6-7, evenly convex ; the last 

 occupies more than two-fifths of the shell : suture rather wide 

 and deep, somewhat obhque : mouth roundish-oval, or regularly 

 oval, veiy little contracted above or expanded below ; length 

 about one-foui'th of the whole spire : outer lip rounded, sharply 

 inflected below the periphery : inner Up retreating obliquely 

 (but not very thin) on the upper part, where it is united with 

 the outer lip, so as to form a nearly complete peristome, scarcely 

 reflected and gently curved on the lower part : umhilicus de- 

 veloped more than in the allied species, and consisting of a 

 narrow depression and chink behind the pillar-lip : tooth or 

 fold none. L. 0-105. B. 0-05. 



Habitat : Birterbuy Bay, co. Galway, where Mr. 

 Barlee and I found two specimens by dredging in about 

 15 f. Hanley procured it at Malta, I at Spezzia, and 

 M ^Andrew at Orotava. It is evidently very rare. 



* Latticed. 



