604 EOLIDIDiE. 



Body (half an inch long) ovato-lanceolate, yellowish 

 white, spotted with tawny. Dorsal tentacles long, smooth, 

 tinged and spotted in their middle portion with orange- 

 brown, oral ones mncli shorter, similarly coloured. 

 Branchise ovate, ampulliform, spotted with tawny and 

 opake white, banded with yellow near their white acute 

 tips, set in seven or eight transverse rows of five or six in 

 each, the uppermost ones greatly the largest ; back smooth. 

 Foot obtusely angled. 



Northumberland, Devon, and Dublin (Alder and Han- 

 cock). Menai Straits (E. F.). It inhabits the littoral and 

 laminarian zones. 



33. E. TRICOLOR, Forbes. 



Enbranclius tricolor, Forbes, Malac. Mon. p. 5, pi. 1, f. 1 (bad). 

 Eolis tricolor. Alder and HancO(;k, Monog. part 1, fam. 3, pi. 34. 

 „ violacea. Alder and Hancock, Ann. Nat. Hist. vol. xiii. p. 166. 



Body (an inch or more in length) ovate-lanceolate, yel- 

 lowish or buff. Dorsal tentacles smooth, stout, fawn-co- 

 loured ; oral ones shorter, paler. Branchiee large, ampulli- 

 form, pellucid, orange below, violet centrally, and ringed 

 with bright yellow near their tips, arranged in about thir- 

 teen transverse rows of from three to five in each, approxi- 

 mated on the back, very small at the sides. Foot lan- 

 ceolate, obtusely angled. 



In the coralline zone. Ballaugh, Isle of Man, twenty 

 fathoms, and off Anglcsea (E. F.). Northumberland 

 (A. and H.). Belfast Lough (W. Thompson). 



34. E. AMETHYSTiNA, Aider and Hancock. 



Ann. Nat. Hist. vol. xvi. p. 316. 



Body yellowish. Oral and dorsal tentacles yellowish. 



