EUNICIDAE 129 



Onuphis notialis, n.sp. 



St. 152. 17. i. 27. 53° 51' 30" S, 36° 18' 30" W. 245 m. Gear DLH. Bottom: rock. One 

 specimen. 



St. 170. 23. ii. 27. Off Cape Bowles, Clarence Island. 61" 25' 30" S, 53° 46' 00" W. 342 m. 

 Gear DLH. Bottom: rock. Five specimens. 



St. 175. 2. iii. 27. Bransfield Strait, South Shetlands. 63° 17' 20" S, 59" 48' 15" W. 200 m. 

 Gear DLH. Bottom: mud, stones and gravel. Two specimens. 



St. 190. 24. iii. 27. Bismarck Strait, Palmer Archipelago. 64° 56' 00" S, 65" 35' 00" W. 315 m. 

 Gear DLH. Bottom: mud and rock. Four specimens. 



Description. The most complete specimen measures 35 mm. by 2 mm. and has 

 65 chaetigers. There are dark red segmental colour bands across the body and in two 

 or three examples a longitudinal red stripe down the back. There is a pair of globular 

 frontal tentacles. There are five occipital tentacles. The inner lateral occipital tentacles 

 are the longest, reaching to the 7th chaetiger, and the median is slightly shorter. I can 

 discover no eyes. The tentacular cirri are inserted on the anterior border of the buccal 

 segment just behind the inner laterals. Up to about the 5th chaetiger the body is more 

 cylindrical and the segments longer than in more posterior regions where the body is 

 dorso-ventrally flattened 



The first five feet have long cirriform postchaetal lips (Fig. 48, a), almost as long as 

 the dorsal cirri : the postchaetal lips diminish in size from before backwards and finally 

 disappear about the i6th chaetiger. In the middle and posterior regions of the body 

 the dorsal cirrus just fails to reach the tips of the bristles. The digitiform ventral cirrus 

 is absorbed into a pad by the 5th foot (Fig. 48, ^). There are no branchiae. 



The first five feet have hooded tridentate pseudo-compound bristles (Fig. 48, c) and 

 delicately bordered capillaries. In some preparations one of the teeth of the pseudo- 

 compound bristles is lost and they have a bidentate appearance. Behind the 5th foot 

 the bristles consist of capillaries (Fig. 48, d) and comb chaetae (Fig. 48, e) with about 

 12 rather long teeth. At about the 15th chaetiger a pair of yellow bidentate hooded 

 crochets (Fig. 48,/) appear. The feet are supported by two slender yellow acicula. 



The details of the jaws (Fig. 48, g and h) are given in the figure: the dental formula 

 is 7 — 9 : 7 + 8 — 10. 



Remarks. I was much tempted to regard these specimens as young examples of 

 Onuphis abranchiata, Mcintosh (1885, p. 314), described by that author from Antarctic 

 waters, but there are many points of difterence between these specimens and those of 

 Mcintosh. 



In Mcintosh's type specimens the postchaetal lip of the ist foot is thick and trun- 

 cated; at the 2nd foot it is long and cirriform, slightly shorter than the dorsal cirrus; 

 it diminishes in size from before backwards but appears to be continued to the end of 

 the body. The ventral cirrus has become a pad by the 4th foot. The pseudo-compound 

 chaetae are described as bidentate and not tridentate, as in these specimens. Moreover, 



