SYSTEMATIC ACCOUNT 



Family AMPHINOMIDAE 



Genus Hermodice, Kinberg 



Hermodice carunculata (Pallas) var. didymobranchiata (Baird). 



Fauvel, 1914, pp. 113-116, pi. viii, figs. 22-27, S'^S^- 



Amphinome didymobranchiata, Baird, 1864, pp. 449-450, pi. xlv, figs. 1-7. 



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. Fifteen 

 specimens. 



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. One young specimen. 



Remarks. The largest specimen measures 42 mm. by 6 mm. including the feet, the 

 smallest, the example from St. 283, only 11 mm. by 2 mm. The great majority have 

 lost all their colour in spirit, but in two or three specimens there remain thin dark 

 intersegmental bands on the back. The caruncle reaches back to the 4th chaetiger, and 

 ventrally the first four chaetigers are involved with the mouth. The two branches of 

 the gill are widely separated; the harpoon-shaped dorsal chaetae are few in number 

 and difficult to find. 



These specimens correspond closely to those described by Fauvel {loc. cit.) from 

 St Thomas Island, Gulf of Guinea. Fauvel regards Baird's Amphinotne didymo- 

 branchiata from Ascension Island as a variety of the widely distributed Hennodice 

 canincidata. 



The chief diff'erences between Baird's species and a typical H. carunculata are as 

 follows: in Baird's species the gill is more ramified, and the two branches are widely 

 separated; the dorsal chaetae are longer, finer and softer than in H. carunculata, and the 

 harpoon-shaped notopodial chaetae are comparatively few in number. There is nothing 

 I can add to Fauvel's careful comparative study of the two forms. 



Genus Eurythoe, Kinberg 

 Eurythoe complanata (Pallas). 



Eurythoe alcyonia, Gravier, 1901, pp. 248-254, pi. ix, figs. 140-143 ; pi. x, figs. 144-146. 



St. I. 16. xi. 25. Clarence Bay, Ascension Island. 7° 55' 15" S, 14° 25' 00" W. 16-27 m. 

 GearNRM. Bottom: coral sand and shell. Twenty-five specimens. 



St. 2. 17. xi. 25. Clarence Bay, Ascension Island, Catherine's Point and Collyer Point. Shore 

 collection, on buoy lifted from an inshore position near landing place. Two specimens. 



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

 Annobon. 18-3001. Gear DLH. One young specimen. 



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