126 



THE VOYAGE OF H.M.S. CHALLENGER. 



No tentacle 

 scale. 



Table of Species of Ampldura — continued. 



J Disk witli minute scales hidden by the skin ; middle spine ) . , . 

 \ widened at its end, . . . . . j ^ 



ura semriijera. 



5 J 



o 





widened at its end, 



Four mouth papillae on each side. 



Radial shields \ Uijper disk scales coarse, with primary plates con- \ , i ■ 



long, narrow, V spicuous, . . . . . J -^ ^ 



and joined, j Upper disk scales thin, fine, and equal. Disk flat, Ampli.iura Icevis. 



Mouth shield Ions; and narrow. Disk scales thick and ) ^ , . , 



irregular, without conspicuous primary plates, . . \ ^ ' 



Mouth shield long heart-shaped. Upper disk scales large 1 . , . , ^ , 



with conspicuous primary plates, . . . . J -* 



Upper arm spine flat and broad at the end, . . . Aviphiiira infegra. 



Disk scales above and below regular and equal, ivith a double ) 



marginal border. Upper arm plates with a slight depres- '- 



sion. 



Mouth shields wider than long. Side mouth shields broad, 



ding on outer corner ol 

 separated from the other 



PirT 1 1 ■ 11 ( Outer mouth papilla standing on outer corner of 



, , •< Side mouth shield, and sepai 

 .separated. ^ ^j^^^^^ 



Four arm. f First under arm plate large and usually cut transversely in 



Ampliiura andrea. 

 Amphmra gihhosa. 



Ampjldura ahdita. 



spine 

 Five or six 



two, 



a^ J 



^- 



> Radial shields small and separated within, 

 arm spines, j ■' ' 



rpn ( Disk scales fine; only central primary plate conspicuous. 



• , ,, ) First under arm plate small, 

 spines, middle < t^- i , T, ■ ^ ^ 



■V 111 ) Disk scales coarse ; ail jarimary plates conspicuous. 



V First under arm plate wide and large, 



Four arm J Disk naked below. Tentacle scale minute and like a lip. 

 Radial shields long and narrow, and diverging inward, . 



Disk scaled on both sides. Radial shields large, wide, 

 and joined for half their length. Primary plates 

 conspicuous, ...... 



ir arm i Disl 

 spines. ( R. 



?5 « "5 I Pour arm 



spmes. 



I 



) 

 f 

 V Ampliiura. dupilicata. 



Amphiuixi lohata. 



> Amjihiura dalea. 



> Ampliiura ceriiua. 



> A7nphiura gla,uca. 

 Ampliiura verrilU. 



Five mouth papillae on each side. 



Mouth papillaj similar to Ampliiura duplicata. Radial shields narrow 

 and joined, ........ 



Three middle mouth, papillre longest. Point of mouth angle occupied 

 by lowest tooth, ....... 



i Disk puffed, with minute crowded scales, and long, narrow, separated 

 [ radial shields, ....... 



One tentacle j Mouth papUlte, squarish and crowded. Side mouth shields 

 scale. ( large and wide. Disk scales irregular, small and crowded, . 



o w 



> Ampjliiura nineata. 



\ Ampliiura canescens. 



> Ampliiura tumida. 



> Ampihiura patula. 



Note. — Mr. F. W. Hutton has described Amphiura iiarva (Proc. New Zealand Institute, vol. xi. p. 305). 

 As I have never been fortunate enough to understand any of Mr. Hutton's descriptions of Ophiurans, I should 

 not, perhaps, have been able to place this species in the table, had I seen its diagnosis. 



Amphiura maxima, Lym. (PI. XVIII. figs. 7-9.) 



Amphiura maxima, Lym., Bull. Miis. Comp. ZooL, vol. vi., part 2, p. 19, pi. xi figs. 278-281. 



Disk covered on both sides with swollen, lumpy, irregular scales ; ten stout, sharj) 

 arm spines. Outer mouth papillae wide and scale like. Two very large tentacle scales, 

 one overlapping the other. 



