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



arm plate, and standing at right angles to the arm ; the middle spine is stoutest. Large 

 tentacle pores, but no tentacle scales. Colour in alcohol, disk grey, arms straw. 



Station 141.— December 17, 1873 ; lat. 34° 41' S., long. 18° 36' E. ; 98 fathoms ; sand 

 and gravel. 



Amphiura squamaia, Sars. Ophiolepis {Amphiura) squamata, Sars, Mid. Lit. 

 Fauna, p. 84, 1857; Lym., 111. Cat. Mus. Comp. Zool., No. i. p. 121 ; Ludwig, Echin. 

 des Mittclmeeres, p. 549. 



Ophiura elegans (V), Leach, Zool. Misc., vol. ii. p. 59, 1815. 



Asterias squamata, Delle Chiaje, Mem., voL iii. p. 77, 1828. 



Ophiura neglecta, Johnston, Mag. Nat. Hist., p. 467, 1835. 



Ophiolepis squamata, Mull. & Tr., Wieg. Archiv, vol. vL p. 328 ; Syst. Ast., p. 92. 



Ophiocoma neglecta, Fbs., Brit. Starfishes, p. 30. 



Ophiolepis tenuis, Ayr., Proc. Bost. Soc. Nat. Hist., vol. iv. p. 133, 1851. 



Amphiura tenuis, Lym., Proc. Bost. Soc. Nat. Hist., vol. vii. p. 194. 



Amphiura elegans, Norm., Biology "Valorous" Cruise, Proc. Eoy. Soc. Lond., vol. xxv. p. 215. 



Ophiura moniliformis, Grube, Aktin. Echin. u. Wiir., p. 18, 1840. 



Amphipholis elegans, Ltk., Vid. MeddeL, p. 140, 1871. 



Amphipholis kinbergi, Ljn., Dr. Goes, Oph. Of. Kong. Akad., p. 646, 1871. 



Amphipholis appressa, Ljn., Dr. Goes, Oph. Of. Kong. Akad., p. 647, 1871. 



Amphiura tenera, Ltk., Addit. ad Hist., part. 2, p. 124, pi. iii., 1859; Lym., EL Cat. Mus. 



Comp. Zool., No. i. p. 123. 

 Amphipholis lineata, Ljn., Dr. Goes, Oph. Of. Kong. Akad., p. 634, 1871. 



Menschnikoff 1 describes a curious low worm, Rhopalura of the family Orthonectidce, 

 whose cysts sometimes fill the body cavity of Amphiura squamata, and take the place of 

 ovaries, which disappear. I have never encountered this parasite. 



Station 141.— December 17, 1873; lat. 34° 41' S., long. 18° 36' E. ; 98 fathoms ; 

 sand and gravel. Station 163.— April 4, 1874 ; lat. 36° 56' S., long. 150° 30' E. ; 120 

 fathoms. Such diverse localities further prove the cosmopolite nature of this species. 



Amphiura duplicata, Lym. (PI. XVII. figs. 10-12). 



Amphiura duplicata, Lym., Ill Cat. Mus. Comp. Zool., No. viii., part 2, p. 19, pL v. fig. 78, 

 Outline fig. 87 ; Bull. Mus. Comp. Zool., vol. v., part 9, p. 226. 



Station 56. — May 29, 1873 ; off Bermudas ; 1075 fathoms ; grey ooze. 



Quite common in less depths throughout the West Indies. Amphiura duplicata is 

 somewhat variable ; and, especially, the first under arm plate is not always broken in two. 

 Numerous specimens from the second " Blake " Expedition show usually only three arm 

 spines; three and often four irregular mouth papillae on each side, and disk scales 

 varying in thickness. 



1 Zeitschr. f. Weissen. Zool., vol. liii. part 2, p. 282, 1881. 



