342 Dll. BA.IED ON SEVEllAL GENERA OF EUNICEA. 



autenncD or tentacles. One of these is single, placed in the cen- 

 tre, and, following the terminology adopted to distinguish these 

 organs in the Aphroditacea, may be described as the tentacle; 

 two are intermediate, the antennce; and two external, t\\e palpi. 

 Feet armed with simple and compound setae ; usually with one or 

 two spines (aciculse) and one or two forcipate setae or booklets 

 (uncini). Branchiae generally pectinated and well developed. 

 To this family belong only two genera, Eunice and Mavghysa. 



Grenus I. Eunice. 



Head two- or four-lobed. Buccal segment carrying on its dorsal 

 side two rather short tentacular cirri of the same structure as the 

 tentacle and antennae. Simple setae, in most of the species, of two 

 kinds: — one long, flagelliform, sometimes lanceolate or limbate, 

 and always acutely pointed (simple) ; the other slender, but ter- 

 minating in a broad head, which is surmounted by a series of small 

 teeth, like the teeth of a comb {pectinate setae). The compound 

 setae have the appendage short, falciform, and toothed on its in- 

 ternal edge. The spines {aciculce) are generally stout, dark- 

 coloured, and obtuse. The booklets (uncini) are, in the greater 

 number of instances, terminated, as it were, with two teeth like 

 those of a forceps (forcipate). 



The species are rather numerous, forty-five having been enume- 

 rated by M. Quatrefages. Of these, unfortunately, the Museum 

 possesses only a few. Several new species, however, occur, which, 

 after a short notice of those contained in our collection, I shall 

 briefly describe. I shall arrange those which I have been able to 

 examine, according to the diff'erent appearance of the uncini or 

 booklets of the feet. Perhaps they may be worthy of separate 

 generic denominations. 



I. Species in which no uncini or booklets are present. 

 This division is perhaps equivalent to the genus Eunice as 



restricted by Malmgren. 



II. Species in which uncini are present, but are not forcipate 



at the apex. 



III. Species which possess uncini forcipate at the apex. 

 These two divisions may be equal to the genus Leodoce of Savigny 



as restricted by Malmgren. 



N.JB. All the species mentioned here are in the British 

 Museum. 



