From the Annals and Magazine of Natural History for May, 1892. 



OBSERVATIONS ON TWO RARE BRITISH NUDIBRANCHS, 



(Lomanotus genbi Verany, and Hancockia eudactylota, Gosse). 



By F. W. Gamble, B.Sc, Assistant to the Beyer Professor of Zoology, 

 Owens College, Manchester. 



Plate VII. 



While working last summer at the Plymouth Laboratory of the 

 Marine Biological Association I obtained a single specimen of each of 

 these species during successive weeks from the same part of Plymouth 

 Sound. Finding that my Lomanotus possessed certain peculiarities of 

 which I could find no adequate description or figures, and that 

 Hancockia had only been taken on one previous occasion on the British 

 coasts (by Mr. A. R, Hunt, in Tor Bay, 1877), I observed and drew 

 the living animals with the following results. 



Lomanotus genei, Verany. (PI. VII. figs. 1 and 2). 



Specimens referable to this species have been taken from time to 

 time on our coasts. Mr. Garstang, in his recent report*, has collected 

 these cases and added a number which have occurred at Plymouth. 

 The following description of my own specimen agrees closely in certain 

 points, such as size, colour, and general structure, with that of his 

 two dark individuals t. 



Length half an inch. 



* " Complete List of Plymouth Opisthobranchs," Journ. Mar. Biol. Assoc. 

 (n. s.) i. no. 4. 



t " Report on Nudibranchs of Plymouth. Sound," Journ. Mar. Biol. Assoc. 

 I. ii. 1889, p. 187. 



