104 On some new species of British Nudibraricldata. 



(the anterior one bifid), rather small, diminishing posteriorly. 

 Length T \jths of an inch. 



This pretty species was dredged by Mr. Barlee at St. Ives in 

 the summer of 1853. 



Tritonia alba. 



Transparent white, with opake-white transverse markings ; 

 rather depressed, smooth or very faintly tuberculated : branchiae- 

 imperfectly bipinnate, 4 or 5 on each side, with intermediate 

 smaller ones, set on an expanded and waved pallial margin : veil 

 bilobed, with irregular digitations. Length J inch. 



The character of the tongue has again come to our aid in di- 

 stinguishing this species from the young of T. Hombergii, to 

 which it bears great resemblance. In this species the lingual 

 spines have slender lateral denticles, while those of T. Hombergii 

 are quite smooth. It occurs occasionally along with T. plebeia, 

 on masses of Alcyonium digitatum brought in on the fishing lines, 

 at Cullercoats, Northumberland. 



EOLIS CARNEA. 



Flesh-coloured, slender: branchiae linear-conical, rose-coloured, 

 set in seven clusters : tentacles rather long, of equal length, the 

 dorsal pair dark olive-brown, paler above : oral pair whitish : 

 anterior angles of the foot much produced. Length \ an inch. 



A single specimen was dredged by Mrs. Wyatt of Torquay in 

 Salcombe Bay some years ago. We have not met with it in a 

 living state. The dentition of the tongue, as well as the cha- 

 racter and arrangement of the branchial papillae, show a relation- 

 ship between this species and E. alba. 



EOLIS GLAUCOIDES. 



White, depressed : head small : tentacles small, smooth : 

 branchiae linear, white, with yellowish tips, and a narrow, pale 

 fulvous central gland, set in 1 1 pedunculated clusters : foot 

 broad, with the anterior angles acute, short. Length | an inch. 



Under stones near low-water mark on the Isle of Herm near 

 Guernsey. This very curious Eolis shows, in most of its cha- 

 racters, an approach to the genus Glaucus. One specimen only 

 was found. 



Eolis pustulata. 



White, pellucid : branchiae long, linear, obtuse, yellowish 

 orange, granulated with white, set in 9 or 10 rows : tentacles 

 shortish : anterior angles of the foot rounded. Length \ inch. 



We obtained two examples of this new species from the fishing 

 boats at Cullercoats. The granular character of the papillae 

 distinguishes it from every other British species. 



