MUSEUM OF COMPARATIVE ZOOLOGY. 27 



Amphiura eoncolor sp. nov. 



Plate XII. Figs. 317-319. 



Special Marks. — Three moutli- papillae on each side, the inner one large and 

 thick, the two outer small and bead -like. Two, sometimes only one, small ten- 

 tacle-scales. Four arm-spines. Kadial shields narrow and separated. 



Description of an Individual (Station 1 95). — Diameter of disk 8 mm. Length 

 of arm 6o mm. Width of arm close to disk, without spines, 1 mm. Two very 

 short, small mouth-papillse each side of the mouth-angle, and a pair, large, 

 rounded, much swollen at its apex. Four large, thick teeth, with a square 

 cutting edge. Mouth-shield wide spear-head shaped, with a blunt angle within, 

 and the inner sides slightly curved. Side mouth-shields large, broad without, 

 tapering inward, where they just meet. Basal under arm-plates large, pentagonal 

 with the inner angle truncated, broader than long, outer edge straight, lateral 

 sides re-enteringly curved. Side arm-plates rather small, projecting moderately, 

 meeting neither above nor below. Upper arm-plates short and wide, of a trans- 

 verse pointed oval form, with outer and inner edge slightly curved. Disk 

 round and flat, but rather thick, covered with irregular, overlapping scales ; 

 those in the interbrachial spaces being somewhat coarser than the others. 

 Radial shields long and narrow, with outer end rounded, and an acute angle 

 inward, separated their entire length by a single row of scales. Interbrachial 

 spaces on the under surface covered by similar, but finer, scaling. Four short, 

 blunt, ratlier slender arm-spines, the upper one being slightly shortest. Two 

 small, rounded tentacle-scales, one on the brachial side of the tentacle-pore and 

 one on the side arm-plate. On some pores there is but a single scale. Color 

 in alcohol, straw. 



Station 195, 1425 fathoms, 2 specimens. Station 191, 800 fathoms, 12-|- 

 specimens. 



Amphiura dalea sp! nov. 



Plate XII. Figs. 330-323. 



Special Marks. — Four mouth-papillae on a side. Three arm-spines, the 

 middle one swollen. One tentacle-scale. Disk-scales fine, only the central 

 primary plate being conspicuous. First under arm-plate small. 



Description of an Individual (Station 325). — Diameter of disk 9 mm. 

 Width of arm close to disk, without spines, 1.3 mm. Three stout, close-set 

 papillae on either side of the mouth-angle, and two large and much rounded at 

 the apex ; of those on the sides the outermost is largest. Moutb-shields small, 

 triangular, a little longer than wide, rounded on all sides except within, where 

 is a point. Side mouth-shields large, broad without, tapering inward where 

 they just meet. First under arm-plate very small ; those beyond are broader 

 than long, angular, and with re-entering curves on the sides where are the ten- 

 tacle-pores ; still farther out they are triangular, with outer edge much curved, 



