238 Mr. W. King on some Shells and other Invertebrate Forms 



cellulosa has the meshes generally wider than the interstices ; in 

 R. Beaniana they are not so wide. These differences are not the 

 result of age, as they prevail in old and young specimens of both 

 species ; probably there may be other differences which can only 

 be detected by a powerful microscope. In other respects, the 

 British coral seems to be closely related to the one living in the 

 Mediterranean. My specimens of Retepora Beaniana are from 

 deep water off the coast of Northumberland*. 



From an examination of a specimen of the Shetland Retepora 

 in the Newcastle museum, I have very little doubt that it is the 

 same species as the one found on our coast. 



Hypothyris psittacea (genus, Phillips) = Terebratula psit- 

 tacea, auct. 



Notwithstanding it having been stated that this shell has been 

 found at various places on the British coasts, there seems to be 

 still some doubt on the mind of many conchologists that it is 

 really a native of our seas. My specimens, one of which is as 

 large as any that I have seen from the Arctic seas, were brought 

 up from a depth of thirty fathoms, twenty-five miles from the 

 north coast of Northumberland ; they were dead specimens, and 

 hanging to the byssus of a Modiola vulgaris. Mr. Maclaren has 

 found it on the Berwickshire coast attached to the lines of the 

 Coldingham fishermen f. My reasons for placing this shell in the 

 genus Hypothyris are given in the July Number of the f Annals 

 of Natural History/ 



Pecten striatus, Miiller = Pecten Landsburyhii, Forbes. 



My specimen measures Jths and y^-th by §ths and ygth, and 

 was dredged in thirty fathoms water, thirty-five miles east of the 

 south part of the coast of Northumberland. I have every reason 

 to believe that it is not only specifically new to our coasts, but 

 that it has not hitherto been found on the east coast of Britain. 



Crenella DECUSSATA = ili2/^7ws decussatuSj Montagu. 

 I have a single specimen of this shell from the deep water of 

 our coasts ; it was lying in a cavity of a small stone brought up by 

 the fishing-lines. Fabricius says that the Crenella (Mytilus) faba 



* This coral was dredged in about sixty fathoms water off our coasts by 

 Mr. Richard Howse of Sunderland, who went on a dredging excursion the 

 week after mine. At the same time he dredged at about the same depth 

 a live specimen of Fusus barvacensis, Johnston, an inch long, two nida- 

 mental capsules of Fusus norvegicus (an account of which is given here- 

 after), a live specimen of Solen pellucidus, a few specimens of Astarte dam- 

 nonice, A. scotica, Spatangus purpureus, Opkiurte, Corallines, &c. As in 

 my case (which is now the third), he also encountered a heavy gale, which 

 prevented the dredge being put down more than five times. 



t Proceedings of the Berwickshire Naturalists' Club, vol. i. p. 213. 



