OF NORTHUMBERLAND AND DURHAM. 19 



doubt, perhaps, whether it is the /. elegcms of Leuckart. It differs 

 from /. aspersa in having five rows of filamentary appendages, as 

 well as in their greater length, and in the slender form and un- 

 equal length of the branchiae, which in /. aspersa are stout and 

 equal, forming a regular rosette. The prevailing colour in this 

 genus is red ; our individual was white. 



Family. TRiTONiADiE, Johnston. 

 11. TE ITONI A, CWier. 

 1. T. HOMBERGII, Cuv. 



Tritonia Homhergii, Flem. Brit. Anim. 284; Johnston in 

 Ann. Nat. Hist. i. lU, t. 3, f. 1, 2. 



From deep water, rather rare. Whitburn. — Rev. G. G. Abbes. 

 From a fishing boat at Newcastle Quay. — 3fr. W. King. The 

 jaws are somtimes met with in the stomachs of fish caught on the 

 coast. Dr. Johnston states that it is not uncommon in Berwick 

 Bay. 



We have frequently got a small white Tritonia from the 

 fishing boats at Cullercoats and Newbiggin, very like the young 

 of this species, but differing in colour, and never approaching it 

 in size. It may possibly be distinct, but we refrain from de- 

 scribing it until we are better acquainted with the young of T. 

 Hombergii. We have named it in manuscript T. alba. Mr. 

 Abbes has sent us the same variety from Whitburn. 

 2. T. PLEBEiA, Jo/ms. 



Tritonia plebeia, Johns, in Ann. Nat. Hist. i. 115, t. 3, f. 

 3, 4 ; Aid. and Hanc. Mon. Nudib. Moll., fam. 2, pi. 3. 



On old shells and zoophytes, especially on Alcyonitmi digita- 

 tum, from rather deepish water, common. Cullercoats, New- 

 biggin, and Whitburn. 



Fam. EoLiDiDiE, UOrbigny. 

 12. DENDRONOTUS, Alder and Hancock. 

 1. D. ARB0RESCEN8, Miill. 



Dendronotus arborescens, Aid. and Hanc. Mon. Nudib. Moll., 

 fam. 3, pi. 3. 



D 



