38 SUPPLEMENT TO THE CRAG MOLLUSCA. 
Pievrotoma arrenuATA, Montagu. Supplement, Tab. III, fig. 7. 
Morex arrenvatus, Mont. Test. Brit., p. 266, pl. ix, fig. 6, 1803. 
PLEUROTOMA ATTENUATA, Jeffreys. Brit. Conch., vol. iv, p. 377, pl. xe, 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 P/. gracihor, A. Bell, ‘Ann. and 
Mag. Nat. Hist.,’ May, 1871, can be specifically separated from it. 
PLEUROTOMA sEPTANGULARIS, Montagu. Supplement, Tab. VI, fig. 16. 
Murex sEpraneuLaris, 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 (ose). 
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. IIT, fig. 15. 
Spec. Char, Pl. Testa fusiformi, tereti; anfractibus 7, juata suturam costulata 
obsolete angulatis, longitudinaliter subtilissime striatis, transversim costulatis 3 Spira 
acuminata. 
Length, 3 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 costa are prominent, terminating at the upper angle of the 
