REPORT ON THE OPHIUROIDEA. 121 



lapping scales ; those in the centre being much finer than those without, and the largest 

 are arranged in rows radiating from the radial shields. These are large and stout, about 

 as broad as long, and of an irregular triangular shape, with the outer end rounded ; 

 length to breadth 1"4 : 1"1; they are separated by a row of two or three large, rounded, 

 overlapping scales. On the under surface the scaling is much finer than above. Four 

 or five short, blunt, cylindrical, slightly tapering arm spines ; upper one longest and 

 somewhat longer than an arm joint. Two tentacle scales, one small and lip-like, on the 

 under arm plate ; the other oval and on the side arm plate. 



Colour in alcohol, straw. 



Station 214.— February 10, 1875 ; north-east of Celebes ; lat. 4"'33' N., long. 127° 6' 

 E. ; 500 fathoms ; globigerina ooze. 



This species stands nearest Oi^hiactis cuspidata, from which it differs in the scaling 

 of the disk, and by having two tentacle scales. 



Species of OpJiiactis not herein described. 



Ophiactis affinis, Duncan, Jouru. Linn. Soc, vol. xiv. p. 469, pis. x. and xi. 

 figs 23, 24, 1879. 

 Korean Sea. 



Ophiactis hallii, Ltk., Addit. ad Hist., part 2, p. 126, 1859. 



Ophiocoma Ballii, Tliomp., Ann. Nat. Hist., vol v. jj. 99, 1840. 



OpMocoma Gooddri, Fbs., Brit. Starfishes, p. 35. 



AmpMura Ballii, Sars, Midd. Lit. Fauna, p. 98 ; Oversigt Norges Echin., p. 17. 



Ophiocnida Ballii, Lym., HI. Cat. Mus. Comp. ZooL, No. i. p. 12. 



North Atlantic ; 40 to 50 fathoms. 



Ophiactis loricata, Lym., Bull. Mus. Comp. ZooL, vol. i., part 10, p. 331, 1869. 

 Florida ; 10 to 110 fathoms. 



Ophiactis hjmani, Ljn., Dr. Goes, Oph. Of. Kong. Akad., p. 629, 1871. 

 West Indies ; 40 fathoms. 



Ophiactis pilana, Lym., Bull. Mus. Comp. ZooL, vol. i., part 10, p. 330, 1869. 

 Florida; 10 to 140 fathoms. 



Ophiactis virens, Sars, Midd. Lit. Fauna, p. 95, 1857 ; Ltk., Addit. ad Hist., part 2, 

 p. 126 ; Simroth, Anatomic und Schizogonie, Zeits. fur Wissen, Zoologie, vol. xxvii. ; 

 Ludwig, Echin. des Mittelmeeres, p. 548. 



(?) Ophiolqns Ballii, Miill. & Tr., Syst. Ast., p. 97, 



Mediterranean. 



