38 SUPPLEMENT TO THE CRAG MOLLUSC A. 



Pleurotoma attenuata, Montagu. Supplement, Tab. Ill, fig. 7. 



Murex attenuates, Mont. Test. Brit., p. 266, pi. ix, fig. 6, 1803. 

 Pleurotoma attenuata, Jeffreys. Brit. Conch., vol. iv, p. 377, pi. xc, fig. 2. 



Locality. Coralline Crag, Orford and Sutton. 



A few specimens in my Collection appear to correspond with Montague's figure and 

 expressive description, as well as with those of Forbes, and Hanley, and Mr. Jeffreys, 

 although my specimens, being fossil, do not exhibit the spirally-coloured lines of the living 

 shell. The outer lip of my specimens is not quite perfect, but the lines of growth show 

 an elegant curve with a moderately sized sinuation from the projecting portion up to the 

 suture. Fig. 6 a, Tab. VII, of ' Crag Moll.,' may, I think, be a form of this species ; 

 and so far as I have seen, I doubt if the shell called PL gracilior, A. Bell, ' Ann. and 

 Mag. Nat. Hist.,' May, 1871, can be specifically separated from it. 



Pleurotoma septangularis, Montagu. Supplement, Tab. VI, fig. 1G. 



Murex septangularis, Mont. Test. Brit., p. 268, Tab. IX, fig. 5. 

 Pleurotoma heptagona, Scacchi. Notiz., p. 42, t. i, fig. 9. 



— septangulare, Phil. En. Moll. Sic.,' vol. ii, p. 169. 



Locality. Post-glacial, Nar Brickearth, Pentney {Rose). 



Two specimens belonging undoubtedly to this well-known species are in Mr. Rose's 

 cabinet, and I give them without hesitation ; moreover, they are attested in Mr. Jeffreys' 

 handwriting. Mr. Rose has kindly permitted me the use of them for illustration. 



This is one of the existing British species which I have not seen or heard of from any 

 Tertiary deposit in this country older than the Post-glacial. 



Pleurotoma elegantior, S. Wood. Supplement, Tab. Ill, fig. 15. 



S/jec. Char. PI. Testa fusiformi, tereti ; anfractibus 7, juxla suturam costulata 

 obsolete angulatis, longitudinaliter sublilissime striatis, iransversim costulatis ; sjjira 

 acuminata. 



Length, \ an inch. 



Locality. Upper Glacial, Bridlington. 



The specimen figured was, among some Bridlington fossils, obligingly sent to me for 

 examination by Mr. Leckenby. It comes near to, but does not seem identical with, 

 M. elegans of Moller. The costse are prominent, terminating at the upper angle of the 



