DR. BAIBD OK SEVERAL GENERA OF EUNICEA. 351 



Feet : — Simple setae long, fine and acutely pointed. Pectinate 

 setae few in number and small. Compound setae only half the 

 length of the simple setae ; falciform appendage small, with only 

 one small tooth under' the apex. There are two spines or aciculso, 

 light-coloured and slightly curved at the apex, which is obtuse, 

 and only one uncinus or booklet, which is light-coloured also, 

 curved, and forcipate at the apex. 



Hah. Island of Narcon, Antarctic Seas, Antarctic Expedition. 



Sp. 17. Eunice Guildingi, Saird. 



Body about 51 inches long, tapering very much towards the tail, 

 which portion of the body is quite cylindrical. Convex dorsally, 

 flattish ventrally for about half its length. The anterior por- 

 tion of the body is about 3 lines in breadth, and the posterior 

 only about 1. Body of a dark rufous colour, with very little iri- 

 descence. Head with two lobes. Buccal segment about equal to 

 the two next succeeding. Ventral margin of buccal segment not 

 crenate. Tentacle, antennae, and palpi short, rather thick, and 

 indistinctly moniliform ; tentacle a little longer than antennae. 

 Tentacular cirri about equal to the breadth of the buccal segment. 

 Dorsal cirri very indistinctly articulated, of moderate length. 

 Ventral cirri very short. Branchiae commencing at about the fifth 

 pair of feet, rapidly attaining their greatest development, but 

 quickly afterwards diminishing in number of pectinations, and at 

 about half the length of the body disappearing altogether. 



Feet : — Simple setae long, lanceolate, finely denticulate or ser- 

 rate at one side for half their length, and acutely pointed. Pec- 

 tinate setao broad at the apex, but the pectinations or teeth not 

 very distinct, outermost one most prominent ; these setae are of 

 unequal sizo, some being mucli smaller than the others. Com- 

 pound seta) with the falciform appendage strongly and sharply 

 bidcntate, one tooth a little below the apex, the otlier nearer the 

 lower portion. There is only one spine, which is straight, dark- 

 coloured, and obtusely pointed, and only one uncinus or booklet, 

 which is curved and indistinctly forcipate at apex. 



Ilal. St. Vincent's, West Indies, Ouilding. 



G-enus II. Marphtsa. 



LeodocjE marphysse, Savighy, I, c, Grube, 8fc. 



Eunice (sp.), Cuvier, Audouin 8f M.-Edwards, ^c. 



Miirphysa, Quatrefages. 



Head with or without lobes. No tentacular cirri on back of 



