198 DE. BATED OK THE APHEODITACEAN ANISTELIDES. 



large, black ; jaws large and stout. Feet strong, biramous, the 

 two branches of nearly equal size and wide apart. Bristles of 

 dorsal branch very long, strong and sharp-pointed, smooth, and 

 of a bright horn-colour. Bristles of ventral branch much shorter, 

 and finely serrated from a little below the sharp smooth point 

 down for about Ird of their length. Both branches are produced 

 into a long sharp point. Dorsal cirrus long, very slender and 

 setaceous, only a little shorter than the long bristles of dorsal 

 branch. Elytra thin, membranous, nearly smooth, but armed 

 with a few scattered, rather strong prickles. Anal cirri long, 

 slender, and setaceous like the dorsal cirri. Yentral cirri set 

 upon strong peduncles, reaching to about the end of ventral 

 branch of foot. 



Hah. Dredged, during the Antarctic Expedition, from a deptli 

 of 300 fathoms, in lat. S. 74|°, long. E. I75i° {Mus. Brit). 



Sp. 6. Heemadion ettliglneum, sp. nov. • 



The animal is about 1| inch in length, and, including the 

 setae of feet, about | an inch broad. It is nearly black, the dorsal 

 surface especially so, whUe down the centre of the ventral surface 

 there runs a lighter-coloured streak or line. The head is of 

 moderate size ; the antennae are affixed by their bases to the 

 cephalic lobe under the tentacle, and are short. The tentacle is 

 long — about three tim^s the length of the antennae. The palpi are 

 very stout at their bases, and very long, much longer than the 

 tentacle. All these organs are smooth and setaceous. The feet 

 are stout, biramous ; and each branch is prolonged into a long, 

 sharp, setaceous point, that of the ventral branch being the 

 longest. The two spines are brown-coloured, and extend to the 

 point of each prolongation. The bristles of the dorsal branch are 

 slightly curved and densely serrated along the upper half of their 

 length. Those of the ventral branch are longer, more numerous, 

 more slender, straight, and toothed from the apex, on each side, 

 for about a third of their length. The dorsal cirri are long, seta- 

 ceous, and sparsely and irregularly armed with cUia. The ventral 

 cirri are sharp and setaceous. The elytra are 15 (?) pairs, oval in 

 shape, and covered all over with minute granulations. The mar- 

 gin and the surface near the external margin are dotted with 

 large, round, prominent tubercles ; and one extremity is densely 

 fringed with cilia. 



All the specimens we possess are unfortunately m. rather bad 

 condition, so that it is difficult to determine the exact length of 



