GONIADA. 189 



readily by the black tips of the lobes of the feet. This character 

 appears to be constant, and is most decided on the posterior portion 

 of the body. There is generally a black spot over the base of the 

 foot, or a few black streaks or specks. 



(a) Scotland, Lieut. Thomas, R.N. 



(b) Scotland, Lieut. Thomas, R.N. 

 (e) Scotland, Lieut. Thomas, R.N. 



18. GONIADA. 



Goniada, Aud. Sf M.-Edw. Lift, de la France, ii. 244. 



Char. Body scolopendriform, the segments dimidiate : head cor- 

 nute, with four small antennae on the apex : tentacular cirri none : 

 mouth inferior, with a large proboscis armed on the ventral side with 

 two series of wedge-shaped (7) denticles : feet biramous ; the 

 bristles compound, with the terminal piece dovetailed to the shaft, 

 and setaceous. 



I . G. maculata, body compressed posteriorly ; proboscis without 

 jaws, the aperture plain ; the middle and posterior feet much more 

 developed than the anterior, the ventral branch acutely four-lobed ; 

 the spine a pale yellowish-brown. Length 4-6" ; breadth li'". 



Goniada maculata. Oersted, Consp. Annul. Dan. 33. f. 16,23, 91, 95, 

 97 & 98. Grube, Fam. Annel. 60. 



Hab. The littoral region. 



Obs. This is very slender in comparison to its breadth. Oersted 

 states the length to be 18 or 20 inches, and yet the extreme breadth 

 is only a line and a half. The body is narrowed posteriorly and 

 compressed, whereas the anterior third, also narrowed towards the 

 head, is almost cylindrical ; it is of a dirty dull green, with a dusky 

 line across each segment, and the anterior segments especially are 

 glowmg with blue and green iridescence. The cornute head is ob- 

 scurely annulated, and the antennae are colourless. The surface of 

 the proboscis is papillose, and the orifice is irregularly crenulate ; 

 but there are no jaws, and the ventral denticles did not seem to be 

 regular in their arrangement or definite in their number. The rings 

 are numerous and short, the first forty, or thereabouts, with small 

 feet, which become crowded and much more protuberant on the 

 after rings, and so continue proportionably to the very extremity. 

 These feet are divided into four digitiform lobules, of which the 

 middle ones are the most elongated and carry the bristles ; and the 

 lobules become very divergent, and are reflected at the points, on the 

 hinder segments. The bristles are in two unequal fascicles, the 

 smaller fascicle on the dorsal branch, and each with a spine of a pale 

 yellow colour : the bristles themselves are colourless, very slender, 

 bayonet-like, with a long sharp setaceous smooth point. 



