Polychaeta. 275 



The single speciniec, obtained off Cape Adare in 20 to 24 fathoms, 

 is a fragment with thirty-six anterior segments, upwards of 12 mm. 

 in length and nearly 3 mm. across the body without the feet ; 5 mm, 

 over the setae. The dorsal cirri are long and smooth, but under the 

 microscope faint articulations can be discerned near the free end. 

 They stretch across the dorsum, measuring therefore about 3 mm. in 

 length. The dorsal cirri of the first three segments are shorter than 

 the succeeding, graduating in size from the first, until at the fourth 

 segment the normal filiform dorsal cirri commence. The stout 

 antennae are equal to or slightly exceed the length of the palps 

 which meet together quite at the base. The eyes are in a wide 

 sub-rectangle, the anterior pair the larger. 



ARICIIDAE. 



9. Aeicia makginata. 



• (PL XLV., fig. 4.) 



Aricia marginata, Ehlers, 1897, op. cit., p. 95. 



A poorly preserved incomplete specimen was taken off Cape 

 Adare in 8 fathoms, January 17, 1900. 



The anterior body-region comprises the achaetous buccal segment 

 and thirteen setigerous segments which carry dorsal fascicles of long 

 slender capillary setae, one side of which is notched like a file, the 

 notches slightly imbricating ; and oval dorso-ventrally elongated 

 neuropodial fascicles of stout aciculiform crochets, which present a 

 tristichous arrangement. The ventral crochets are stout dark-brown 

 spines with a curved blunt end and low serrations on the convex 

 border. 



10. SCOLOPLOS KERGUELENSIS. 



Scoloplos kergvielensis, IMelutuisli, lb85, op. cit., \). 855; Khlcrs, 1897, op. ciL, 

 [>. 97. 



One specimen washed up after a gale with Harmotlioe at Cape 

 Adare, January 25, 1900 ; others dredged in 8-10 fathoms. 



Both dorsal and ventral setae are simple and capillary ; after the 

 ninth setigerous segment the pliaretrae setarum become dorsal. 



Length 7"25 mm. ; segments fifty-six, the last few being 

 achaetous. 



T 2 



