128 THE VOYAGE OF H.M.S. CHALLENGER. 



Disk rather thick, and slightly lobed, covered above and below with small rather thin 

 overlapping scales, among which the primaries are scarcely to be distinguished ; those 

 near the margin and underneath are finest, being nine or ten in 1 mm. long. Radial 

 shields long, narrow and pointed within ; length to breadth 2:7; they are separated 

 their whole length by a narrow wedge composed of scales longer than those of the neigh- 

 bouring disk. Four moderately stout, cylindrical, tapering arm spines, of equal lengths, 

 and somewhat longer than the arm joints. Two minute rounded tentacle scales, one on 

 the side arm plate, the other on the under arm plate. Colour in alcohol, very pale brown. 

 The young of this species has sometimes only one tentacle scale, 

 Station 232.— May 12, 1875 ; lat. 35° 11' N., long. 139° 28' E.; 345 fathoms; sandy 

 mud. Station 174 (var. ?).— August 3, 1874 ; lat. 19° 10' S. ; long. 178° 10' E. ; 210 to 

 610 fathoms ; globigerina ooze. Station 236. — June 5, 1875; lat. 34° 58' N., long. 139° 

 30' E. ; 420 to 775 fathoms ; mud. 



Amphiura otteri, Ljn., Dr. Goes, Oph. Of. Kong. Akad., p. 631, 1871. 



Station 76.— July 3, 1873 ; lat. 38° 11' N., long. 27° 9' W. ; 900 fathoms ; globi- 

 gerina ooze. Station 45.— May 3, 1873 ; lat. 38° 34' N., long. 72° 10' W. ; 1240 

 fathoms; mud. Station 78.— July 10, 1873 ; lat. 37° 24' N., long. 25° 13' W. ; 1000 

 fathoms ; globigerina ooze. Station 50.— May 21, 1873; lat. 42° 8' N., long. 63° 39' W. ; 

 1250 fathoms; grey ooze. 



Ihave not much question that this is Ljungman's Amphiura otteri which has some 

 variety as to size and curve of spines. The unique originals of this and many other 

 species were, with great kindness, lent me by Professor Loven ; and Dr. G. O. Sars 

 showed a similar generosity. 



Amphiura studeri, Lym., Bull. Mus. Comp. Zool., vol. vi., part 2, p. 32, 1879. 

 Amphiura antardka, Staler, Monatsb. Konig. Akad. Berlin, p. 461, 1876. 



Station 151. — February 7, 1874 ; off Heard Island; 75 fathoms ; mud. Off Marion 

 Island; 50 to 75 fathoms. Station 145. — December 27, 1873; off Prince Edward's 

 Island; lat. 46° 40' S., long. 37° 50' E. ; 310 fathoms (young). Off Prince Edward's 

 Island; 85 to 150 fathoms. Royal Sound, Kerguelen Island; 28 fathoms. Balfour 

 Bay, Kerguelen Island ; 20 to 60 fathoms. 



As I have combined Arrvphipholis with Amphiura, Professor Studer's name has 

 become a duplicate to {Amphipholis) antarctica, Ljn. I take, therefore, the liberty of 

 giving it the name of its discoverer, who kindly identified these specimens by his own. 



Amphiura incana, Lym. (PI. XXXIII. figs 5-7 ; PI. XL VI. fig. 5). 



Amphiura incana, Lym., Bull. Mus. Comp. Zool., vol. vi., part 2, p. 20, pi. xi. figs. 285-287, 1879. 

 Disk scaled on both sides. Two tentacle scales. Radial shields narrow, about three 



