﻿178 



SUPPLEMENT TO THE CRAG MOLLUSCA. 



is the name Fusus Largillierti, Eisch, as a species from the Upper Crag. The specimen 

 on the authority of which this name was so introduced has obligingly been sent to me by 

 Mr. Robert Bell (who tells me that Mr. Jeffreys so referred it), and it is figured as" 

 above. I have carefully examined and compared it with the figure and description of 

 F. Largillierti by M. S. Petit, ' Journ. de Conch.,' vol. 2, p. 255, Plate 7, fig. 6, 1851, 

 and can see no identity. Our shell differs in several respects, more particularly in being 

 strongly striated, while Largillierti is smooth and in the form of the volutions and mouth. 

 The specimen appears to me to be a distortion of Norvegicus, the position of the canal 

 having been displaced by the same malformation of the animal which imparted the 

 prominent shoulder to the whorl. 



Pleurotoma clathrata ? Marcel de Serres. Addendum, Plate, fig. 8 a, b. 



Pleurotoma clathrata, Marc, de Serr. Geogn. des Ter. Tert. de la Fa., t. xi, figs. 



7, 8. 



— — Dujard. Coq. Foss. Touraine, p. 294, pi. xx, fig. 6. 



— — Homes. Vienna Foss., p. 3/9, t. xl, fig. 20 a — c. 



Locality. Cor. Crag, Sutton. 



A single specimen in my cabinet which I had considered as a variety of PL Philberti 

 may, 1 now think, be referred to the above species. The cancellations are larger, coarser, 

 and fewer, with the knobs more prominent, and the depressions deeper than is the case 

 with PI. Philberti ; and, although I have not been able to compare my shell with a 

 Touraine specimen of the species to which I have referred it, the foreign authors seem to 

 me to justify the reference. 



Pleurotoma tereoides, S. Wood. Addendum, Plate, fig. 3 a, b. 



Spec. desc. PL Testa minuta, fusiformi-turrita ; anfractibus convexis, angulatis, supra 

 planulatis, infra convexis ; spiraliter lineatis, lineis incrementi conspicuis ; labro profunde 

 sinuato ; cauda longiuscula aperto ; apertura oblonga, spiram aquante. 



Locality. Cor. Crag, Sutton. 



A single small specimen has lately rewarded my researches, of which the figure above 

 referred to is a representation. It makes considerable approach to PL teres, Eorbes, but is, 

 I believe, distinct. I have compared specimens of the same size of PL teres, obtained by 

 Mr. Jeffreys in his deep-sea dredgings, which I believe differ specifically from my Crag 

 shell. Mr. Smith, of the British Museum, has shown to me a small specimen in the 



