606 EOLIDIDiE. 



ringed with red below tlieir white tips, distant, four on 

 each side. Foot very narrow. 



On the verge of the littoral, and in the laniinarian zone 

 on corallines. Berwick (Johnston) ; Northumberland and 

 Argyleshire (Alder and Hancock). 



S7. E. EXiGUA, Alder and Hancock. 



Ann. Nat. Hist. 2nd series vol. i. p. 192, and Monog. part 5, fam. 3, pi. 37. 

 Terffipcs lacliudatus, Loven, Iiid. Moll. Scand. pt. 7. 



Body (two-tenths of an inch long) linear, yellowish 

 white, tinged with green. Dorsal tentacles linear, banded 

 with olive, as are also the oral ones, which are not more 

 than half as long. Branchiae large, clavate, yellowish belted 

 interruptedly with olive, and sometimes nnged near the 

 apex with red, five or six on each side of the back, the 

 foremost sometimes grouped in two or three. Foot linear. 



Cornwall, on fuci and corallines in shallow water (Alder, 

 Cocks). 



The Eolis plumosa of Fleming described as half an inch 

 in length, having a single row of simple linear branchiae on 

 each side, might be supposed to belong to this division, 

 were it not that its discoverer (who found it in Zetland) 

 states that the dorsal tentacula are " pinnated towards 

 the dextral extremity." 



EMBLETONIA, Alder and Hancock. 



Body elongated, Hmaciform, not provided with a distinct 

 mantle. Head produced at each side into a flat lobe. 

 Tentacula two, sublateral ; branchiae subcylindrical, simple, 

 usually arranged in a single, in part alternating, series down 

 each side of the back. Orifices at the right side. 



