Mr. P. II. Gosse nn new or little-known Marine Animals. 385 



cate, instead of subulate ; and the colours of the little animal are 

 less vivid than those ascribed by its learned dcscribers to E. 

 foliosa. I should designate the hue of ray specimen a bright 

 cinnamon-redj rather than cinnabar, and the median line of the 

 ventral surface is purplish. Its length is f inch. 



As the species named is, however, the only one which these 

 zoologists recognise as European, I presume the present must 

 be identified with it. I am not aware that any Euphrosyne has 

 been before detected on the British coasts. 



Fam. Nereids. 

 Lysidice rufa (mihi). The Red Lysidice. 



Length 1^ in. to 2 in. ; width j^ in. Segments 70. Body 

 subcylindrical, almost equal in thickness throughout, and not at 

 all diminishing posteriorly. 



Head of two rounded lobes, notched rather than divided. 

 Eyes two, round, black. Antennse three, of the same form and 

 size, rounded and constricted at the base, conical, pointed, white ; 

 the central one in advance of the others, without any accessory 

 tubercle. 



First segment about half as long again as the following. The 

 feet commence on the third segment. The fourth segment is 

 pellucid white, slightly swollen, and appears in some degree to 

 sheath those before it, in contraction. 



Feet rounded and obtuse. Superior cirri conical, reaching 

 just beyond the foot; inferior cirri small. Bristles white; aci- 

 culi black. They continue to the very last segment, which is 

 as large as the rest, truncate, with a central depression, with no 

 terminal styles or tubercles. 



Jaws deep black, visible through the rings, but often protruded, 

 and widely expanded. 



Colour above indian-red, each segment studded with numerous 

 white round dots ; some of these begin, about the fifteenth seg- 

 ment, to arrange themselves in a line across the middle, and this 

 transverse line becomes more conspicuous on the following seg- 

 ments, and forms a ridge. The crimson contents of the dorsal 

 vessel are visible as a medial dark red line down the body. 

 Head whitish, dotted with brown. Under parts pearly, mottled 

 with purplish red on the anterior half. 



The bristles of the ventral bundle are of the form which MM. 

 Audouin and M. -Edwards have called " poils en serpe" the 

 stafi* of which is dilated at the extremity and very obliquely 

 truncate, and the accessory piece knife-shaped with the tip and 

 the heel projecting, and a small but well-marked straight tooth 

 near the tip ; a slender lamina just embracing all. This form 



Ann. ^f Mag. N. Hist. Ser. 2. Vol. xii. 27 



