2 SECOND SUPPLEMENT TO THE CRAG MOLLUSCA. 



the base, and slightly so at the shoulder, where there are traces of undulated ridges like 

 those of undatum. 



I have also figured another shell from the Cor. Crag belonging to Dr. Reed which, I 

 think, is a deformed specimen of Bucci?ium Dalei (2nd Sup., tab. i, fig. 2) ; the thickened 

 margin was formed, I imagine, when its growth was arrested, and the ridge upon the 

 columella is, I think, the result of disease, and therefore only a malformation. 



Buccinum declive, S. Wood. 2nd Sup., Tab. II, fig. 10 a, b. 



Locality. Cor. Crag ? Boy ton. 



This is another specimen out of the rich cabinet of Dr. Reed, who gives it from that 

 somewhat doubtful locality of Boyton. This specimen may be described as ovato- 

 fusiformi, spira elevata, apice obtusa, spiraliter striata, anfractibus 5 — 6 convexis, suturis 

 depressis, valcle distinctis, obsolete costata; apertura ovata, labro simplici acuta; canali 

 breve. It is, I believe, distinct from any of the varieties of the variable shell B. undatum, 

 the volutions are more convex, with a much deeper suture, and it has a more obtuse or 

 mammillated apex. 



The shell has been a good deal rubbed. The striae, although somewhat obliterated, 

 are visible in places, and the longitudinal ridges are also visible, but not very regular or 

 distinct. These do not appear to be at all "undulated" as if the outer lip had been 

 sinuated, and as this character seems to indicate that the shell is distinct from undatum, 

 I have assigned to it the above name, but it must be regarded as a doubtful species. 



Nassa prismatica, Brocchi. 2nd Sup., Tab. I, fig. 6. 



Buccinum prysmaticum, Bi-oc. Conch. Foss. Subap., p. 337, t. v, fig. 7, 1814. 



Spec. Char. " Testa ovato-oblongd, longitudinaliter costata, striis transversis crebris, 

 elevatis, labro columellari, superne uniplicato, basi rejlexd, emarginatd " (Brocchi). 



Axis 1 inch. 



Localities. Cor. Crag, Sutton. 



Fossil in Piacentino, Italy. 



The present specimen is from the cabinet of the Rev. Mr. Canham, and from the lower 

 part of the Coralline Crag. The shell represented under this name in the Crag Moll, 

 vol. i, p. 32, tab. iii, fig. 6, is, I now believe, a distinct species, and I have resumed 

 the name of Nassa microstoma for it as next described. 



