CLATHURELLA LINEARIS. 37<> 



Genus CLATHURELLA, Carpenter (continued from p. 241). 



Clathurella linearis (Montagu). Plate XXVIII, figs. 2(3— 2D ; Plate XXXIX, 



fig. 34. 



1864. Pleurotoma sp., E. Forbes, Mem. Geol. Surv., vol. i, p. 4:2(>, no. 128. 



1915. Clathurella linearis, F. W. Harmer, Plioc. Moll. Gt. Brit., pt. ii, p. 237, pi. xxviii, figs. 26-29. 



Distribution. — Fossil : Wexford gravels (additional). 



Remarks. — In the work quoted above Prof. Forbes speaks of having found, at 

 the locality named, a small species of Pleurotoma allied to P. linearis, having 12 ribs 

 on the body-whorl, as to which he says that " the whorls are convex, spirally 

 furrowed, and strongly ribbed longitudinally." The specimen now figured, which 

 I have recently found in our Wexford collection, though not identical with the 

 typical British shell, agrees with that description and is probably the same as that 

 of Prof. Forbes; if so, the name of 0. linearis may be added to the list of the 

 Wexford fossils. 



Clathurella minuta, sp. nov. Plate XXXIX, fig. 33. 



1848. Pleurotoma castanea, S. V. Wood, Mon. Crag Moll., pt. i, p. 57, pi. vii, fig. 3. 



1871. Defrancia linearis, Jeffreys in Prestwich, Quart. Journ. Geol. Soc, vol. xxvii, p. 143. 



Specific Characters.— Shell minute, slender, elongato-ovate, whorls slightly 

 convex ; ornamented by obtuse, inconspicuous longitudinal costae and by regular, 

 distinct but very fine spiral striation which crosses the ribs ; mouth ovate with a 

 thickened outer lip and a labial sinus ; canal very short. 



Dimensions. — L. 4/5 mm. B. 1*75 mm. 



Distribution. — Not known living. 



Fossil : Coralline Crag : Sutton, Ramsholt. 

 Remarks. — This charming little shell was known to Wood from two specimens 

 only which he had found at Sutton. The one now figured belongs to the Ipswich 

 Museum and was obtained, Mr. Bell thinks, by the late Rev. H. Canham at 

 Ramsholt. Jeffreys regarded it as a variety of the recent British form G. linearis, 

 while Forbes and Hanley identified it with Mangilia rvfa. I agree that it is not 

 the Fusus castaneus of Brown, 1 which seems to have been a somewhat larger shell, 

 and prefer to consider it a distinct species. 



1 Brown, Illust, Becent Conch. Gt. Brit., ed. 2, p. 6, pi. v, figs. 43, 44, 1844. 



