174 MOLLUSCA FROM THE CRAG. 



impressed upon a glossy surface ; spire hidden ; vertex umbilicated or funnel-shaped ; 

 aperture narrow above, and expanded below; left lip slightly replicate, with an 

 obscure fold upon the columella. 



Axis, \ of an inch ; diameter, \. 



Locality. Cor. Crag, Sutton. 



This is by no means a rare species at the above locality. It differs a little, as might 

 be expected, from the Paris basin-shell but not sufficiently to entitle it to specific 



distinction. 



In perfect specimens the striae may be observed over the whole surface, though 

 most distinct upon the base of the volution ; when seen, they appear fewer and more 

 distant than upon the French Eocene specimens, which are rather more elongate or 

 less conical, with a rounded vertex. In the Crag shell the upper part of the lip is 

 rather sharp, producing a funnel-shaped depression at the spire. 



3. BULLA ACUMINATA. Bruff. Tab. XXI, fig. 7, a c. 



BULLA ACUMINATA. Brug. Enc. Meth. Vers. torn. 1, p. 376, 1789. 



_ Phil. En. Moll. Sic. vol. i, p. 122, t. 7, fig. 18, 1836. 



Phil. vol. ii, p. 96, 1844. 



Grat. Not. sur les Fam. des Bull. p. 63, pi. 3, fig. 43-44, 1837. 



8. Wood. Catalogue 1842. 



Nygt. Coq. foss. de Belg. p. 457, t. 39, fig. 11, 1844. 

 CYLICHNA ACUMINATA. LovSn. Ind Moll. Scand. p. 10, 1846. 



(Not BULLA ACUMINATA of Min. Conch.) 



B. Testa minutd, subfusiformi, superne parum attenuatd, sed acuminatd, subtus rotun- 

 datd; in medio Icevissimd ad basim striatd ; aperturd anguste lineari, inferne perparum 

 latiore ; columella basi obsolete uniplicatd. 



Shell small, subfusiform ; outer lip contracted, and acuminated at the upper 

 extremity, rounded at the lower part, smooth and glossy in the middle, finely striated 

 at the extremities ; striae thicker, and more distinct around the base ; aperture linear, 

 expanded slightly below, with an obsolete fold upon the columella. 

 Axis, I of an inch ; diameter, ^ its length. 



Locality. Cor. Crag, Sutton. Recent, Mediterranean and British Seas. 



An abundant species in the Coralline Crag, but I have found it only in one locality. 

 In my Catalogue this name was given with doubt, as in the descriptions at the above 

 references, it is spoken of as " laevissima," and the figures do not well represent our shell. 

 Mr. Alder, however, informs me that he has lately obtained a specimen in Lamlash Bay, 

 and that Mr. Barlee got one also from Loch Fyne, both of which are striated ; the striae 

 upon the Mediterranean shell have, in all probability, been overlooked, as they are 

 present in the British specimens. This shell being convolute upon a nearly horizontal 

 axis, the spire is of course hidden, the outer lip being elevated, and so contracted at 

 the upper part as to give it the appearance of having an acuminated apex, and instead 

 of approaching Bullina it might be said to form a passage into Ovula, through 



