128 MR. STOREY ON INDIGENOUS AND NATURALIZED PLANTS, 



In conclusion, we have only to state our conviction that the 

 Doridce rank with the most highly -organized Gasteropods, and 

 that the genus, as at present understood, will require to be broken 

 up into several groups. 



VI. — Notice of the occurre7ice, on the Durham Coast, of Diphyllidia 

 lineata. By Albany Hancock, Esq. 



[Read, March 21, 1851.] 



In the early part of last year, the Rev. G. C. Abbes brought to 

 me a small mollusk which he had obtained from the boats at 

 Whitburn. On examination, this creature proved to be Diphyllidia 

 lineata, a most interesting addition to the marine fauna, not only 

 of the district, but of England. It has occurred only once before 

 in the British seas; in September, 1849, a single specimen having 

 been dredged off Shetland by Mr. Barlee. These two, the only 

 British examples, are much smaller than those obtained in the 

 Mediterranean, and are more attenuated in form. Thinking, 

 therefore, that our specimen might possibly be a distinct species, 

 I was induced to examine its internal structure; and Mr. Alder 

 having kindly supplied individuals of the true D. lineata, a strict 

 comparison was instituted, and has resulted in determining that 

 the two forms are identical. 



VII. — An Enumeration of Plants, indigenous and naturalized, 

 occurring within five miles of Newcastle-upon-Tyne. By John 

 Storey, F.B.S.E. ; Corresponding Member of the Botanical 

 Society of London, &c. 



[Read, March 21, 1851.] 



Early in the month of March, 1850, I received a communica- 

 tion from Mr. Hewett Cottrell Watson, author of the Cyhele 



