20 OPHIOCNIDA FILOGRANEA. 



either side, and a curve without, where it is widest ; length to breadth, 

 .S : .9. Side arm-plates robust and nearly or quite meeting above and 

 below. Upper arm-plates broader than long, bounded by a strong curve 

 within, and by a gentle one without; length to breadth, .5 : .7. Disk cov- 

 ered with large, but not swollen scales, whereof the central primary one is 

 conspicuous, having a diameter of .6 mm . In a line between it and the inner 

 ends of the radial shields there are only three scales. Radial shields pear- 

 seed shape, diverging inward and touching only at their outer extremities; 

 separated by a wedge of two or three scales ; length to breadth, .7 : .3. Arm- 

 spines, near disk, four ; stout, rounded, tapering, blunt, of nearly equal length, 

 which to that of an under ami-plate is .5 : .7. Tentacle-scales two, small, 

 rounded, placed at right angles, one on the under, the other on the side 

 arm-plate. 



Color, in alcohol, nearly white. 



Hassler Expedition ; Barbadoes. 100 fathoms. Brazil? 



Amphiura chilensis? Ltk. 



Ophiolepis chilensis. Mull, and Trosch. Wieg. Archiv. IX. 120. 

 PL V. f. 77. 



A specimen from Talcahuano Bay, Chili, agrees well with the description 

 and with my notes on the original at Berlin, except that the arms of this 

 specimen are shorter, and the tentacle-scales larger. The description of 

 Midler and Troschel says one tentacle-scale, but the specimen in the Berlin 

 Museum has two. 



Ophiocnida filogranea sp. nov. 



O nl line figures SS, 89. 



Special Marks. — Close set granules along margin and on a part of inter- 

 brachial spaces of disk. Radial shields verj wide and short, and joined along 

 their whole length. Three month-papillae on each side, the innermost one 



Stoutest. Ann- long and slender. 



/; cripim of an Individual. — Diameter of disk, 7 mm . Width of arm with- 

 out spines, II""". Length of arm, 72" Mouth-papillse tax to each mouth- 

 angle; the innermost two are largest, run upwards to the teeth, and are 



rounded ; the next on either side is smaller and s|.inil*orin. and the oulernio-t 

 is Hat with a .u,\ed edge. Mouth-shields small. longer than broad, live-sided. 



