AMPHIURA BARBAR.E. 17 



Amphiura Barbarse sp. nov. 

 PI. III. f. 32-34. 



Special Harks. — Three sharp arm-spines. Under arm-plates with a notch 

 without. Side mouth-shields narrow and bent and nearly meeting on the 

 arm. 



Description of cm Individual. — Diameter of disk, 4™° . Width of arm without 

 spines, .S™ 10 -. Length of arm, 26 mm . Mouth-papillae six to each mouth- 

 angle, of which the two innermost run upward towards the teeth, under 

 which they stand ; the two on each side are stout, fiat, with rounded edges ; 

 the outermost one stands partly on the prominent mouth-frame and partly 

 on the side mouth-shield. Mouth-shields small, rounded diamond-shape ; 

 length to breadth, .4 : .3. Side mouth-shields narrow and much bent ; meet- 

 ing within, and nearly reaching the median line of the arms without. Under 

 arm-plates squarish, with rounded corners; an obtuse angle within, and a 

 re-entering curve without ; length to breadth, .3 : .3. Side arm-plates rather 

 weak ; nearly meeting below, but widely separated above. Upper arm- 

 plates much wider than long, pointed oval ; length to breadth, .3 : .7. Disk 

 beset with fine thin delicate scales, which are much smaller on the inter- 

 brachial spaces below. Only the central primary plate is conspicuous by its 

 larger size. Above there are six or seven scales in the length of a mm. ; 

 below, about sixteen. Eadial shields large, pointed pear-seed shape, closely 

 joined, or partly separated by a very narrow line of scales ; length to breadth, 

 1 : .4. Arm-spines three, sharp, rather slender, rounded, tapering; lowest 

 one longest ; lengths to that of lower arm-plate .4, .4, .6 : .3. Tentacle-scales 

 two, small, wider than long ; set at right angles, one on the under, the other 

 on the side arm-plate. Tentacles large and thick. 



Color, pale straw, in alcohol. 



Hassler Expedition ; Santa Barbara, California, 22 fathoms, 

 t bears some resemblance to the descriptions of A. Chilensis, but the radial 

 shields are joined, and the three arm-spines are sharp and rather long. 



Amphiura flexuosa? Ljn. 



Ljungman. Ophiuroidea Viventia, p. 319. Brazil. 

 PL III. f. 35-37) PI V. f. 68. 



This corresponds to Ljungman's description and to my notes on his origi- 



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