134 DISCOVERY REPORTS 



Nicidion edentulum, Ehlers. 



Fauvel, 1914, p. 128, pi. vii, figs. 10-12. 



St. 283. 14. viii. 27. Off Annobon, Gulf of Guinea. -75 to i mile N 12° E of Pyramid Rock, 

 Annobon. 18-30 m. Gear DLH. Four specimens. 



Remarks. These specimens are all incomplete posteriorly. The largest measures 

 105 mm. by 2 mm. without the feet, for 165 chaetigers. 



They were found with a number of Eunice siciliensis, from which this species seems 

 to be indistinguishable except for the absence of gills. Fauvel 's suggestion that 

 A'^. edentulum may be a gill-free variety of E. siciliensis seems to me to be plausible. 



Sub-family ONUPHIDINAE, Levinsen 



Genus Diopatra, Audouin and Milne- Edwards 

 Diopatra cuprea (Bosc). 



Augener, 1918, p. 350, text-fig. 39, with synonymy, excluding D. punctifera, Ehlers. 



St. 274. 4. viii. 27. Off St Paul de Loanda, Angola. From 8° 40' 15" S, 13° 13' 45" E to 

 8° 38' 15" S, 13° 13' 00" E. 64-65 m. Gear OTL. Bottom: grey mud. Eighteen specimens. 



Remarks. The largest of these specimens measures 185 mm. by 5 mm. without the 

 feet. The gills begin on the 4th or 5th chaetiger and end between the 35th and 40th. 

 The three posterior occipital tentacles have 18 rings to their tentaculophores and the 

 paired tentacles reach back to the I4th-i6th chaetiger. The comb chaetae have about 

 20 teeth. There are no tubes. 



I have nothing to add to Augener 's article on this species. I give my reasons for 

 doubting that D. punctifera, Ehlers, is synonymous with D. cuprea in my remarks on 

 the former species. 



Diopatra punctifera, Ehlers. 



Ehlers, 1908, p. 79, pi. x, figs. i-ii. 

 St. WS 4. 30. ix. 26. 32° 45' 00" S, 18" 10' 00" E. 45-47 m. Gear DL. Fourteen specimens. 



Remarks. An average specimen measures about 75 mm. by 4 mm. without the feet. 

 The colouring is similar to that of D. cuprea. The posterior occipital tentacles have 

 eight rings to their ceratophores and the paired tentacles reach back to the 4th chaetiger. 

 The comb chaetae are wide at the apex and have 15-20 teeth. The gills begin on the 

 5th chaetiger and are continued for about 40 segments. 



The dental formula (Fig. 44, a) is 7 — 8 : 7 + 6 — 9, and the upper jaws resemble 

 Ehlers' figure. 



These specimens correspond closely to Ehlers' description and figures except in the 

 structure of the lower jaw plates (Fig. 44, b). These are black except for the calcareous 

 end-pieces, very thick, heavy and spatulate : they are widely different from those figured 

 by Ehlers. It may be unjustifiable to refer these specimens to Ehlers' species, when 



