5° 



DISCOVERY REPORTS 



There are 15 pairs of prominent elytrophores and the elytra are all lost. The pseudo- 

 elytrophores are scarcely less prominent than the elytrophores. The dorsal cirrophores 

 are set low down on the foot and are very large structures with a prominent lateral 

 bulge or expansion. The dorsal cirri are very long, the tips of the bristles only reaching 

 to about half their length. 



The feet (Fig. 11, b) are biramous and the bristles very numerous. Both dorsal and 

 ventral lobes have long pointed prolongations containing the acicula. The dorsal 

 aciculum reaches to about half the length of the dorsal bristles ; the ventral is a little 

 longer. The dorsal bristles (Fig. 11, e) are stouter than the ventral, strongly pectinate 

 on one edge and smooth at their tips. The ventral (Fig. 11, d and e) are unidentate with 

 well-developed rows of teeth. The ventral cirri are short, barely reaching to the end 

 of the chaeta sac. 



Remarks. I have examined Mcintosh's type specimens, and I believe the present 

 Antarctic examples to be conspecific with them. Mcintosh does not record the arrange- 

 ment of the elytra; they occur on the following feet: 1,3,4, 6, 8, 10, 12, 14, 16, 18, 20, 

 22, 25, 28, 31. This species is now known from the South Shetlands, from the vicinity 

 of Kerguelen Island and from 600 fathoms off Buenos Ayres. 



Genus Eunoe, Malmgren 



Eunoe opalina, Mcintosh. 



Mcintosh, 1885, pp. 71-72, pi. X, fig. 5; pi. xix, fig. 2; 

 pi. viii A, figs. 9-1 1. 



St. 187. 18. iii. 27. Neumayr Channel, Palmer Archipelago. 

 64° 48' 30" 8,63° 31' 30" W. 259m. GearDLH. Bottom:mud. 

 One specimen. 



Description. This example has 20 chaetigers followed 

 by a regenerating hinder end of 12 chaetigers. The 

 measurement is 24 mm. by 10 mm. including the feet, 

 and the colour in spirit is a pale yellow. 



Mcintosh has a good figure of the head. The eyes 

 are lateral and the two pairs are set close together. 

 The front pair is about half-way up the prostomium 

 and the hinder pair is a little more lateral than as 

 shown in Mcintosh's figure. The lateral tentaculo- 

 phores are larger and more prominent than as drawn 

 by Mcintosh, and the lateral tentacles are slightly 

 longer than the prostomium. The palps are long and 

 tapering and. the ventral cirrus of the first foot is 

 prolonged into a sort of accessory tentacular cirrus. 

 Nearly all the elytra are lost and the few that remain 



QJ- 



Imm.' 



0-L 



a 



Fig. 12. Eunoe opalina. 



are damaged. They are thin semi-transparent structures a. Dorsal bristle, b. Ventral bristle. 



