144 Proceedings of the Royal Physical Society. 



1857. AmpMura Ballii, Sars, Middelhavets Litt. Fauna, p. 99. 



1859. Ophiaetis ,, Ltk., Addit. ad. Hist., pt. ii., p. 126. 



1861. Amphiura ,, Sars, Oversigt Norges Echin., pp. 17, 20. 



1865. ,, „ Norman, Ann. and Mag. Nat. Hist., ser. 3, vol. 



XV., p. 109. » 



1865. OpMocnida ,, Lyman, HI. Cat. Mus. Comp. ZooL, No. i., p. 12, 



1882. Ophiaetis ,, Id., Zool. Chall. Exp., pt. xiv., p. '121. 

 1884. „ „ Hoyle, Proc. Roy. Soc, Edinb., June 16. 



Hahitat. British Seas. — Slietland ; " off the coasts of 

 Durham and N'orthumberland (Norman) ; Moray Firth (Mr 

 T. Edward); Dublin (Dr Ball);"i Anstruther (Forbes Coll. 

 B. M.) ; Faroe Channel, both warm and cold areas, in the 

 former of which it was dredged by H.M.S. " Porcupine " from 

 a depth of 363 fathoms; very rare. 



Other Localities. — Scandinavian coast (Duben and Koren), 

 down to 190 fathoms (Norman) ; North Atlantic, depth 40 

 to 50 fathoms (Lyman). 



Ophiobyrsa. 

 Ophiohyrsa hystr-icis, Lyman. 



1883. Ojyhiobyrsa hystricis, Lyman, Bull. Mus. Comp. Zool., vol. x., No. 6, 



p. 272. 



1884. ,, ,, Hoyle, Proc. Roy. Soc, Edinb., June 16. 



Habitat. British Seas. — Hitherto this species has only 

 been dredged at one station in the cold area of the Faroe 

 Channel from a depth of 345 fathoms. It is mentioned by 

 Sir Wyville Thomson in his account of the "Porcupine" 

 cruise as being nearly allied to Ophiomyxa, but no name is 

 given to it.^ 



Other representatives of the genus are found off Australia 

 and the West Indies (Lyman). 



Ophiochiton. 

 Ophiochiton tenuispinus, Lyman. 



1883. Ophiochiton tenuispinus, Lyman, Bull. Mus. Comp. Zool,, vol. x., No. 



6, p. 255, pi. v., figs. 67-69. 



^ Norman, loc. cit. 



2 Depths of the Sea, p. 123 ; 1873, London. 



