found on the coast of Northumberland and of Durham. 243 



which are situated close to the edge of the posterior end of the 

 shell, as in Mya uddevallensis. Young specimens of this variety 

 are likewise more truncated than those of the same age of the 

 normal form. I have seen specimens brought up from a depth 

 of thirty fathoms intermediate between M. pelagica and the 

 latter. 



PanoptEA arctica = Glycimeris arctica, Lam. 



I have much pleasure in recording this interesting shell as an 

 addition to our local fauna. Mr. Bean has procured it on the 

 Yorkshire coast : my specimens are from both the Northumber- 

 land and the Durham coast, where they were brought up from deep 

 water. My largest specimen measures 3^ inches by 2 J. It is a 

 somewhat variable shell on our coasts, but apparently not more so 

 than it was in the Mediterranean during the pleiocene period. 



Bjmula Noachina= genus Cemoria, Leach = Sipho, Brown = \ 

 Puncturella, Lowe. 



I dredged a live specimen of this shell in fifty fathoms water, 

 sixty miles to the east of the north coast of Durham. The spe- 

 cies (Rimula Blainvilli and R. fragilis) on which this genus was 

 founded do not differ generically from our local one ; I have 

 therefore been induced to adopt the earlier name of Defrance in 

 preference to that of Leach. 



Trochus millegranus, Philippi. 

 Only a single specimen of this beautiful shell has fallen into 

 my hands ; it was brought up by the lines from deep water off 

 the coast of Northumberland. 



SCALARIA TREVELYANIANA. 



This species is only rare on our coast : a single dead specimen 

 came up in the dredge from a depth of fifty fathoms. My largest 

 and best specimen is Jths of an inch in length, and is of a brown- 

 ish flesh-colour. 



NATICA GRffiNLANDICA, Beck. 



Mr. Bean was the first to extend the geographical range of this 

 shell to Britain : he finds it on the Yorkshire coast. Besides pro- 

 curing it from the boats that fish on our coasts, I have dredged it 

 alive in fifty fathoms. The animal is of a milk-white colour, and 

 resembles that of Natica Alderi in form, but apparently it is not 

 furnished with tentacles ; I had it alive for a few hours, during 

 which time it was very active, but either through not wishing to 

 gratify me, or not possessing them, it never showed any trace of 

 these appendages. 



Fusus antiquus, Muller. 



The coasts of Northumberland and Durham afford two 



