130 PYRAMIDELLID.^. 



narrow band round the top of the succeeding whorl : mouth 

 oval, expanding below ; it somewhat exceeds in length one- 

 third of the spire : outer Up slightly reflected, not much spread 

 over the pillar, nor extending to the upper part of the outer 

 lip ; it is more or less angulated below : umbilicus very dis- 

 tinct although small : tooth small, prominent, and placed op- 

 posite the umbilicus : operculum yellowish and rather solid, 

 closely and finely striated across ; it is divided lengthwise 

 about one-third the distance from the pillar by a curved groove, 

 which forms a ridge on the under side ; inner side straight ; 

 flap narrow; spire consisting of 2 or 3 whorls. L. 0-1. 

 B. 0-05. 



Var. elongata. Spire more produced. 



Habitat : Coralline zone, in Torbay (Battersby) ; 

 south of Devon (Webster); Land's End (Hockin) ; Oban 

 (M'Kenzie) ; Loch Eyne, west of Scotland, and Lerwick 

 (Barlee); Aberdeenshire (Dawson); Shetland (M f An- 

 drew). Of the variety I fonnd a single specimen by 

 dredging in Zostera- ground at Southampton. The only 

 extra-British localities to my knowledge are the coast of 

 Bohuslan, in 12 f. (with Mytilus Adriaticus) and also in 

 20f., as well as on Eggers Bank, Norway, in 1 50 f. (Malm), 

 and in Finmark (Lilljeborg); the Norwegian specimens 

 are of unusually large size, but possess all the characters 

 of the species. It seems to be everywhere rare. 



Malm has well remarked that this species is easily 

 distinguished from any other by its conspicuous um- 

 bilicus, glossy surface, and convex whorls. 



11. O. acu'ta*, Jeffreys. 



O. acuta, Jeffr. in Ann. & Mag. N. H. 2nd ser. ii. p. 338 ; F. & H. iii. 

 p. 269, pi. xcvii. f. 8, 9. 



Body dirty white, speckled with pale-yellow, red, brown or 

 leadcolour points, which are irregularly distributed over many 

 of the external organs : mantle folded at the upper angle of the 

 mouth of the shell, so as to form a tubular canal : snout slender, 



* Pointed. 



