NOTES ON SOME BKITISII NUDIBRANCHS. 361 



CORYPHELLA LANDSBURGHII, ALDER & HANCOCK. 



(Alder and Hancock, Monog. of British Nudih., Fam. 3, pi. 20. Trinciiese, 

 ^olididce di Genova, ii., Tav. Ixii., Ixiv., Ixvi.-lxx. Beroh, Die Niidih: 

 gesammelt w'ihrend d. Falirten d. Willem Barents, j). 8.) 



One living specimen, Plymouth, April, 1905. Very slender and 

 elongate, 7 mm. long and only about 1 mm. broad. Cerata nearly 

 2 mm. long; rhinophores 2'd mm. long. Foot produced into distinct 

 tentacular angles. Oral tentacles fairly long and slightly wrinkled ; 

 rhinophores longer and more distinctly wrinkled. They bear low rings 

 of rather irregular outline, but not perfoliations or knobs. The cerata 

 are set in eight short rows arranged as follows on each side : — 



2 

 2 

 3 



Three rows close together. 



2] 



o r Two rows close together. 



2 



2 Three distinct rows. 

 2 



The body, rhinophores, and tentacles are of a clear amethyst, witli 

 which the orange-red ramifications of the liver within the cerata form 

 a striking contrast. The cerata bear a ring of opaque white below the 

 pellucid tips. The foot is whitish. 



The jaws bear six to seven rows of denticles near the top, but the 

 number decreases lower down. Tiie radula consists of thirty rows. 

 The central tooth is rather broad and arched. It bears five denticles on 

 each side of the central cusp, which is not much larger than the rest. 

 The laterals are of a fair size, but somewhat difficult to see, as they are 

 quite colourless. They have a long apex and five to six small denticles. 



This appears to be a fairly typical example of Alder and Hancock's 

 C. landfihurgliii. They do not mention that the rhinophores are 

 wrinkled, though it is indicated in their plate, and they describe tliem 

 as distinctly shorter than the oral tentacles, which is not the case here. 



The most striking characteristic of this form is its strangely con- 

 trasted coloration. It is very doubtful if the specimen from Vardo 

 referred to this species with a query l)y Bergh (I.e.), really belongs to it. 



CORYPHELLA BEAUMONTI, spec. nov. 



Mr. W. T. Peaumont, to whom the species is dedicated, has kindly 

 furnished me witli the following notes on the living animal. 



" Eolidfrom Barn Puol {Fli/moulh). Lengtli, 16 mm., but looks us if tlie 



