12 SECOND SUPPLEMENT TO THE CRAG MOLLUSCA. 



Pusus NODiFER, A. Bell, MS. 2nd Sup., Tab, III, fig. 4 a, b. 



Locality. Red Crag, Waldringfield. 



The specimen here represented is from the Cabinet of Dr. Reed, and was obtained by 

 Mr. Alf. Bel!, Mdio had affixed to it the above name and the following description : — 

 " Shell fusiform, volutions 5, convex, with a ridge at the section, and eight or nine 

 rounded ribs covered with coarse spiral striae." The specimen is much rubbed and 

 worn, and it is doubtless derived from an older formation. 



At p. 117 of my first Supplement reference is made to the name oi Fusus despedus, 

 Linn., which has been given in the list to the paper of Mr. Prestwich as a species new 

 to the Crag, and also in Mr. A. Bell's list of Crag shells. I have made every endeavour 

 to ascertain where the specimens are upon which this name has been founded, but without 

 success. In my large series of the abundant Red Crag shell, antiquus, nearly every form 

 of exterior ornament, from the very finely striated specimens to such as are ornamented 

 with large and prominent spiral ridges, like those upon F. despedus (' Ency. Meth.,' 

 pi. 42 G) may be seen ; but this latter shell in the recent state has apparently a slightly 

 curved outer lip, and this variety 1 have not seen from the Crag. Fusus tornatusy Gould, 

 is another proximate form, but in this the canal seems to be a little more oblique than 

 in that of the Crag shell, and if these characters be the only diff'erences all three might, 

 I think, be united as varieties of one species. 



Mr. Jas. Reeve has recently sent to me a specimen from the Norwich Museum which, 

 he says, was found at Bramerton ; the name of Fusus antiquus accompanied the shell, and 

 in this I believe he is perfectly right. It appears to have lost the whole, or very nearly so, of 

 the thick outer layer of the original shell, and in its present state, it somewhat resembles 

 what 1 have called Trophon altus, so much so that if it had been entirely denuded by the 

 removal of the outer shell it could not have been recognised for what it really is. So 

 many specimens from the Crag have suffered more or less by the removal of either the 

 outer layer of the shell, or partially so in the destruction of some of its ornamentation, 

 that I mention this case as an instance of the liability to which palseontologists are 

 sometimes misled, by such alterations in the condition of the shell into the adoption of 

 new species or of new identifications. 



A specimen also from Dr. Reed has recently been sent to me with a label on which 

 is written " Fusus antiquus, L., Cor. Crag, Broom Pits, near Orford, from the upper 

 beds." This is nothing but a recent specimen filled with and partially stained on the 

 surface by the Cor. Crag material. I have not yet seen this species (antiquus) from the 

 Cor. Crag. The shell which I have figured as Trophon elegans, is in the list of Mr. 

 Prestwich's paper, p. 492, called a variety oi antiquus ; but so far from assenting to that 



