178 SUPPLEMENT TO THE CRAG MOLLUSCA. 
is the name Fusus Largillierti, Fisch, 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 Zargillierti is smooth and in the form of the volutions and mouth. 
The specimen appears to me to be a distortion of Morveyzcus, the position of the canal 
having been displaced by the same malformation of the animal which imparted the 
prominent shoulder to the whorl. 
PLEvROTOMA CLATHRATA 2 Marcel de Serres. Addendum, Plate, fig. 8 a,. 6. 
PLEUROTOMA CLATHRATA, Mare. de Serr. Geogn. des Ter. Tert. de la Fa., t. xi, figs. 
T's 
— — Dujard. Coq. Foss. Touraine, p. 294, pl. xx, fig. 6. 
— —_ Hornes. Vienna Foss., p. 379, t. xl, fig. 20 a—e. 
Locality. Cor. Crag, Sutton. 
A single specimen in my cabinet which I had considered as a variety of P/. Philbert 
may, I 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 Pl. 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. 
PLevroroma TEREOIDES, S. Wood. Addendum, Plate, fig. 3 a, 6. 
Spec. desc. Pl. Testa minuta, fusiformi-turrita ; anfractibus convexis, angulatis, supra 
planulatis, infra convexis ; spiraliter lineatis, liners incrementi conspicuis ; labro profunde 
sinuato ; cauda longiuscula aperto ; apertura oblonga, spiram equante. 
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 PZ. teres, Forbes, but is, 
I believe, distinct. I have compared specimens of the same size of P/. 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 
