AMPHIURA ANOMALA. 15 



breadth, .8 : 1. Disk covered with somewhat thin and irregular scales, beset 

 with a few thorny stumps. Above, the scales are somewhat elongated, two 

 or three in the length of a mm. ; below, they are smaller and rounded. The 

 upper disk has a few coarse stumps or short thick spines, the longest about 

 .6 mm -, with strong thorns ; the interbrachial spaces below have fewer and 

 shorter stumps. Eadial shields large, of an irregular four or five-sided shape, 

 meeting at their outer ends, but separated within by a broad scale. Their 

 outer ends bear three thorny stumps. Arm-spines eight or nine, the three 

 uppermost longest, stout, somewhat flattened, coarsely serrated ; lengths to 

 that of an under arm-plate 3, 2.8, 2.8, 2.5, 2, 2, 1.5, 1.5, 1 : .8. One tentacle- 

 scale to each pore, which on the second and third plate has the shape of a 

 toothed crescent ; on the plates beyond, it is a thick scale with a toothed 

 edge. 



Color, in alcohol, pale yellowish, with brown spots in radial shields and 

 brown bands on arms. 



Dr. William Stimpson ; probably from deep water on the coast of Cuba. 



Amphiura anomala sp. nov. 

 PL III f. JO -28 



Special Marks. — Sometimes two and sometimes three mouth-papillae on 

 each side, of which the innermost is stoutest and is under the teeth; scaling 

 of disk rather coarse ; radial shields small and wholly separated. 



Description of an Individual — Diameter of disk, 6.5 mm '. Width of arm with- 

 out spines, 1.3™°. Length of arm about SO™"-. Mouth-papillae either three or 

 two on a side : of these one is stout, blunt, and rounded, and stands beside 

 its fellow at the point of the mouth-frames under the teeth ; the second is short, 

 spiniform, and sits on the inner part of the side mouth-shield ; there may or 

 may not be a third intermediate one. also spiniform. Besides these the spini- 

 form tentacle-scale of the first mouth-tentacle may be seen. Mouth-shields 

 longer than broad, rounded diamond-shape ; length to breadth, .8 : .7. Side 

 mouth-shields stout, triangular, with re-entering sides ; not quite meeting 

 within. Under arm-plates longer than broad, rectangular, with lateral sides 

 slightly re-entering ; length to breadth, .5 : .4. Side arm-plates wide, but not 

 prominent, nearly meeting above. Upper arm-plates not covering the sur- 

 face of the arm, rounded, with a peak inward. Disk rather thick, and rising 

 well off the arms ; the scaling is coarse, thickened, and rather irregular, with- 



