16 SUPPLEMENT TO THE CRAG MOLLUSCA.' 
Buccinum Daur, J. Sowerby. Crag. Moll., vol. i, p. 34, Tab. III, fig. 10. Supplement, 
Malo, WL, ie, &. 
Localities. Cor. Crag, Ramsholt, Sutton, and near Orford. Red Crag passim. Fluvio- 
marine Crag, Bramerton; Chillesford bed, Easton Bayent. 4 
The figure in Supplement represents a specimen of Buccinwm Daler found in the Red 
Crag at Walton-on-the-Naze by the Rev. T. Wiltshire, who has obhigingly presented it to 
me. This specimen has the volutions in a reversed direction, that is to say from right to left. 
The late Dr. S. P. Woodward told me in 1864 that he had also found the fragment of a 
specimen of this species in the Coralline Crag with a sinistral volution, and as this shell 
had not been previously known in that reversed condition, I thought it deserving of a 
special representation. Mr. Robert Bell has very recently showed me a similar specimen 
from the Red Crag of Waldringfield. The circumstance that these specimens should have 
been discovered within a short period would seem rather to indicate a slight tendency in 
this species to vary its mode of volution, and perhaps if a few individuals of this form 
congregated together a progeny possessing a sinistral volution might have been produced. 
The form of this species resembles in its general contour that-of Bue. wndatum, but 
it has a more distinct plait or tooth at the base of the columella, like that of Wassa, and 
Mr. Hancock pointed out that the animal had a different kind of “ lingual ribbon ” from 
B. undatum. Yn consequence of this character, and of possessing a different form of 
operculum, Dr. W. Stimpson, in an elaborate paper published in the ‘ Canadian 
Naturalist,’ 1865, vol. ii (wherein he describes fifteen recent species in the genus 
Buccinum), has, at p. 366, proposed for it the generic name of Liomesus “with Buc. Daled 
as the type.” Mr. Jeffreys (‘ Brit. Conch.,’ vol. iv, p. 297, 1867) has given to this shell 
the name of Buccinopsis. Dy. Gray in 1859 proposed a genus under the name of 
Cominella, to receive species resembling Buccinum, having an operculum like that of the 
Murices and Fusi, in which the nucleus is terminal at the inner base of the mouth, 
increasing by semi-elliptical layers. 
If the form of the operculum be sufficient of itself to consitute a generic character, I 
think our species will have to be referred to Cominella, should that be of prior establish- 
ment. With this uncertainty, and being unable to ascertain the date of priority for these 
different names, I have left our Crag species in its original position of Buccinum. A 
specimen of B. Daler is in the Norwich Museum from the Fluvio-marine Crag, and 
1 This has no generic connection with Buccinanops, a word of similar meaning proposed by D’Orbigny, 
1839, of which Herrmannsen says “ Etym. vocabulum hybridum non admittendum ;’’ neither isit generically 
related to two Eocene species figured by Deshayes with the name Buceéinopsis (‘ An. sans Vert. du Bas de 
Par.,’ t. xi, pl. xciii, figs. 21—23 and 29-—32), afterwards described as Zruncaria, Adams. 
