124 



THE VOYAGE OF H.M.S. CHALLENGEE. 



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Table of Species of Amphmra — continued. 



Seven slender arm spines ; lowest longest, . . . Amphiura vmgdlanica. 



Eight short, stout, arm spines ; the upper ones flat and wide. 1 ^„j^;„;j„.^ capensis. 



Upper arm plates narrow, . . • • • j 



Five or six short, conical, barred spines. Eadial shields very ) ^ ,^^.^,^.^ ^^.^^^^^^^^ 



small. Upper arm plates narrow and rounded, . . J 



Four or five arm spines ; lowest longest and bent. Tentacle scale ) j^^^j^^^^^.^^ gmndisquama. 



very large, . • • • ' m ' i i ' I 



Four or five short, blunt, nearly equal arm spmes. Tentacle scale I ^,,„^,;,;„,.^ dimpsoni. 



minute, . ■ • • ' m ' i i' ! 



Three or four short, moderately stout arm spines. Tentacle scale | 



minute. Eadial shields and upper arm plates wider than in V Amplimra acacia. 

 Amphmra stimiisuni, . . • • ■ • ) 



f Six short, stout, arm spines ; the middle one longest. Disk | 



scales fine. Upper arm plates, at base of arm, as broad as ■ Amphiura duncani. 



Ion."" . • • • * * ' ' ^ 



SLx short, stout, eciual arm spines. Disk scales fine. Upper arm ) ^^y,/,,-^^^ constricta. 



plates small, and about twice as broad as long, . . J 



Four or five stumpy arm spines. Eadial shields smaU and sepa- I j^^^j^^^^.^ sundevalli. 



rated, . . . • ■ • V rp 



Four or five stout, tapering, arm spines, of moderate length. Ten- 



tacle scale large and pointed, 



lacie scale largc auu ^^umucu, . . • • • j 



Four long, cylindrical arm spines ; the uppermost and lowest ( 



longest. Tentacle scale large and rounded 



Ampliiura josepliinre. 

 Amphiura irh. 



No tentacle ( Four- tapering, equal arm spines. Disk scales rather large I ^,„^,7„-^„.« tomentosa. 

 scale. I and spaced, . . • • • • ) 



Four or five stout, tapering arm spines. Under arm plates with I ^,„^,7,;,„.a se7niermis. 



an angle within. Upper arm plates as broad as long, . ^ J 

 Five sle'nder, tapering arm spines. Under arm plates squarish | 



shield-shaped. Outer mouth papillre spiniform. Upper avm '^r A mjihiur a lanceolata. 



plates narrow, . • • • ' i ' I 



Six tapering arm spines; lowest longest. Under arm V^^^^^ { A,„^Mura flexuosa. 



squarish, . - • • • ' j I 



Six flat, bhmt arm spines; the next but one to the lowest curved ) ^„y,/„-„^f( latispina. 



and sharp, . • • ■ ■ ' ■ i 1 



Five small arm spines ; the one next the lowest with a terminal 1 ^,„^j^;„,.a kinbergi. 



cross-piece, . • • • • • ■ > 



!- ( Five tapering arm spines. Mouth shields wide, . 



rg One well-marked ) -p^^^^. ^^ ^^^ tapering, cylindrical arm spines. 

 •g A tentacle scale. | ^j^-g^^g rounded, . . . - 



Mouth 



Amphiura glabra. 



o 

 a 



^ 

 ^ 



\ Amphiura 



angularis. 



S. i 



Eadial shields ) Six arm spines, . . . • 



pear-seed shape. J Four to five small, widely-spaced arm spines, 



Amphiura atlaiitica. 

 Amphiura dilatata. 



O -3 

 cS Pi 



"Five .short, stout arm spines. Eadial shields widely diverging. \ j^^^^piinya perphxa. 

 Arms very long and slender, . . . • • i 



Four short, stout arm spines. Eadial shields small and nearly ) ^^y,;^-^,.^ gaxdi. 

 parallel. A few scales on the under surface, . . ■ ] 



. Three or four short, arm spines; the middle one widened at its 1 ^,„^7„-„,.a horealis. 

 end. Eadial shields strongly diverging, . . . ) 



Four slender arm spines ; the lowest longest ; one has sometimes \ 



a cross-piece at the end. Arms very long and slender. \ Amphiura jUiprmis. 

 Eadial shields only slightly diverging, . . . • ) 



Six arm spines. 

 Three arm spines, 



Either two or three mouth papillse on each side. 



Ani}ih'iura anmnala. 

 Ampliiura lunaris. 



