124 



THE VOYAGE OF II.M.S. CHALLENGER. 





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 H 



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5 60 

 "55 <d 





Table of Species of Amphiura — continued. 



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



Eieht short, stout, arm spines ; the upper ones flat and wide. 1 , , . 



? T ' , , r rr } Amphiura caiicmns. 



Upper arm plates narrow, . . . . . J r * 



Five or six short, conical, barred spines. Eadial shields very 1, ... . 



.. -,- T i . ■. i -i / ^l lli I >// / (I I f(, ( 1 1 > /' ' /' ' > (I. 



small. Upper ann plates narrow and rounded, . . J x 



Four or five arm spines ; lowest longest and bent. Tentacle scale ) A Mma ,. aildisqmma , 

 very large, . . .. . . ■ ) 



Four or five short, blunt, nearly equal arm spines. Tentacle scale 1 . . . ,. 



/ Am phi lira >>t iiiipxinu . 

 minute, . . . . . . ■ ) 



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



minute. Eadial shields and upper arm plates wider than in > Amphiura acacia. 



Amphiura siimpsoni, . . . . . . ) 



Six short, stout, arm spines ; the middle one longest. Disk 1 



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



long, . . . . . . . ) 



Six short, stout, equal arm spines. Disk scales fine. Upper arm 1 . , . , . , 



,, -ii-iijj.- iii r Am /'// /lira c< >itxr n I'fti. 



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



Four or five stumpy arm spines. Eadial shields small and sepa- I A Mum SMndemlll 

 rated, . . . . . . . . J x 



Four or five stout, tapering arm spines, of moderate length. Ten- 1 A Mumj Mml . 

 tacle scale large and pointed, . . . . . ) r J * 



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

 longest. Tentacle scale large and rounded, . . ■ i 



tfo tentacle f Four tapering, equal arm spines. Disk scales rather large I Am Mum tommtosa. 

 scale. ( and spaced, . . . . . . / 



Four or five stout, tapering arm spines. Under arm plates with \ A Uum semiermis . 



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



Five slender, tapering arm spines. Under arm plates squarish ) 



shield-shaped. Outer mouth papilla? spiniform. Upper arm > A mphiura lanceolata. 



plates narrow, . . . . . . ) 



Six tapering arm spines; lowest longest. Under arm V^^ ) AmpMura fl exuosa . 



squarish, . . . . . . . ) 



Six flat, blunt arm spines ; the next but one to the lowest curved 1 A Mwa lat{spina . 



and sharp, . . . . . . . J 



Five small arm spines; the one next the lowest with a terminal) A Mum kinhergL 



cross-piece, . . . . . . . J 



Amphiura glabra. 



. r3 

 <b a> 3 



o § to 

 m m 9 



S ° -S 



.Si to fc 



C 03 *" C3 



O ■** -^ fl 



O ^ c3 



„ „ , , ( Five tapering arm spines. Mouth shields wide, . 



One well-marked In o . • vi-i 



. . Four or five tapering, cylindrical arm spines. 



tentacle scale. | shields rounded, . 



Eadial shields 1 Six arm spines, . . . . 



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



Mouth 



<= - 



> Amphiura angularis. 



Amphiura atlantica. 

 Amphiura dilatata. 



Five short, stout arm spines. Eadial shields widely diverging. I Amphiura verplexa. 



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



Four short, stout arm spines. Eadial shields small and nearly ) im , m j,-„„ .-_„■.• 

 , r . . . . > Aiiipinui a baton. 



parallel. A lew scales on the under surface, . . . J 



Jj | \ Three or four short, arm spines ; the middle one widened at its |_ A mv l x iura borealis. 



end. Eadial shields strongly diverging, . . • f 



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



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



Eadial shields only slightly diverging, . . . . ) 



3 2 



« 



Either two or three mouth papillae on each side. 



Six arm spines, 

 Three arm spines. 



Ampliiura anomala. 

 Amphiura lunaris. 



