SECOND SUPPLEMENT TO THE CRAG MOLLUSCA. 



TROPHON PSEUDO-TUETONI, S. Wood. 2nd Sup., Tab. II, fig. 1 ; and Tab. IV, fig. 1. 



TKOPHON NORVEGICDS ? Chemn. Appendix to Crag Moll., t. xxxi, fig. 1; 1st Sup- 

 plement to Crag Moll., t. v, fig. 14 ; and 

 Addendum Tab., fig. 16. 



Locality. Red Crag, Waldringfield. 



In the Appendix to the Crag Mollusca and in ray previous Suppl. are figured and 

 described some specimens of this shell, none of them perfect, under the name of Trophon 

 Norvegicus. The perfect specimens which I arn now able to represent seem to me to differ so 

 considerably, however, from the recent shell called Norvegicus, that I have proposed for it the 

 above name, indicative at once of its distinctive character from Norvegicus and of its affinity 

 to that species. Our present shell possesses more convex volutions and a much deeper 

 suture, a longer spire with a smaller and shorter opening. The recent shell Norvegicus 

 is described as having " the body whorl disproportionately large compared with the spire ;" 

 " the body occupies fths of the dorsal length." The body whorl of our present fossil 

 measures only half of its entire length, and is also more strongly striated ; for assuming 

 even that it has been decorticated and lost some of its outer coating, these striae are 

 more visible than those on the living shell, which on a specimen in my possession are 

 principally confined to the epidermis, or at least are but very slightly visible beneath it. 

 I am anxious to have this fossil correctly described and delineated because in a list of 

 fossils from Uddevalla, by Mr. Jeffreys, read at the Brit. Assoc. 1863, at p. 77, is the 

 name ofFusus Turtonii, Bean, with this remark "a var. approaching in shape F. Norvegicus;' 

 and I imagine this Uddevalla fossil may possibly be the same as our present specimen. 

 I cannot, however, fairly refer the shell figured to either of those species ; and it appears 

 to me to be intermediate between the two. The late Dr. S. P. Woodward in his list of 

 shells from the Norwich crag has the name of T. Norvegicus (J. M. and R. F.) which as 

 well as the one called by Mr. Bell F. Lagillierti (Sup. to Crag Moll., Addendum Plate, 

 fig. 16), may also, I imagine, be the same as the present shell. 



The specimen figured, Tab. IY, fig. 1, is from the Ipswich Museum by the kindness 

 of Dr. J. E. Taylor, the curator. 



TROPHON (TRITONOFUSUS) ALTUS, S. Wood. 2nd Sup., Tab. I, fig. 11. Crag Moll., vol. i, 



Tab. VI, fig. 13, as Trophon altum. 

 1st Sup., p. 23, Tab. II, fig. 17. 



To whatever genus this shell may belong, the specimens exhibit great variation like 



