142 DISCOVERY REPORTS 



Remarks. Except for the three tentacles this form is a typical Liimbrinereis; but the 

 presence of these structures places it outside the sub-family Liimbrinereinae , in which, 

 however, I propose to leave it provisionally rather than create another sub-family. It 

 may possibly be a link between the Lysaretinoe and the Liimbriuereinae, but in its general 

 characteristics it is closer to the latter family than to the former. 



Genus Arabella, Grube 



Arabella iricolor (Montagu). 



Fauvel, 1923, p. 438, fig. 175 a-h, with synonymy. 



St. 51. 4. V. 26. Off Eddystone Rock, East Falkland Island. From 7 miles N 50° E to 7-6 miles 

 N 63° E of Eddystone Rock. 105-115 m. Gear OTL. Bottom: fine sand. Four specimens. 



Remarks. The Arabella lorum, described by Ehlers (1897, p. 78) from off the Pata- 

 gonian coast, is easily distinguished from A. iricolor by the presence of toothed plates 

 in M. I instead of pincers with toothed bases. A. caerulea (Schmarda), described by 

 Ehlers from off the coast of Chile, is near to this species, but the under jaws have a 

 very different shape. 



Genus Drilonereis, Claparede 



Drilonereis filum (Claparede). 



Fauvel, 1923, p. 436, fig. 174 a-h. 



Drilonereis longa, Webster, Augener, 1918, p. 375. 



St. 279. 10. viii. 27. Off Cape Lopez, French Congo. From 8-5 miles N 71° E to 15 miles N 24° E 

 of Cape Lopez Light. 58-67 m. Gear OTL. Bottom: mud and fine sand. Four specimens. 



Remarks. Crossland has described two species, D. major and D. logani, from the east 

 coast of Africa and Suez, both of which differ from this species in the small jaw plates. 



Drilonereis sp. 



St. 4. 30. i. 26. Tristan da Cunha. 36° 55' 00" S, 12" 12' 00" W. 40-46 m. GearDL. Bottom: 

 stones. Two specimens. 



Description. The colour in spirit is dark red and the skin is iridescent. About the 

 first 20 segments are pale in contrast with the rest of the body. The specimens are both 

 incomplete and the larger measures about 400 mm. by 3 mm. without the feet. The 

 prostomium is rather flattened, bluntly conical and without eyes. It is equal in length 

 to the first two segments.- 



The feet are moderately well developed from the ist chaetiger, but show a very 

 gradual increase in size up to about the 25th foot. From the ist foot they consist of a 

 rounded anterior lobe and a longer conical posterior lobe. There is nothing diagnostic 

 about the bristles. There are a number of curved bilimbate capillary bristles, several 

 acicula ending in a fine capillary tip, and a large bluntly pointed ventral aciculum. 



Regarding the jaws (Fig. 53), in one of the specimens they are irnperfectly developed : 

 they are of a very pale yellow colour and incompletely chitinised . In the other specimenr, 



