38 BULLETIN OF THE 



Ophiactis euspidata sp. nov. 



Plate XIII. Figs. 359-361. 



Special Marks. — Disk-scaling coarse, and with few or no spines. Three or 

 four stout, blunt, tapering arm-spines. Two or three mouth-papillse on each 

 side. Teeth lobed. 



Description of an Individual (Station 170). — Diameter of disk 5 mm. Length 

 of arm 25 mm. Width of arm close to disk 1.3 mm. Two large, broad, flat 

 mouth-papilloe on each side, whereof the outer one is larger. Seven or eight 

 large flat teeth, of a very wide heart-shape, and having a little lobe, or peak, 

 within. Mouth-shields broader than long, wide heart-shape, or transverse 

 diamond-shape, with rounded angles ; length to breadth .Q : .8. Side mouth- 

 shields stout, slightly curved, rather broad, meeting within, where they have a 

 rounded end. First under arm-plate stout and rather large, wider within than 

 without, and having re-enteringiy curved lateral sides. The plates beyond are 

 shield-shaped, widest without, and having a somewhat obtuse angle within. 

 Outer side curved, lateral sides re-enteringly curved. Side arm-plates stout, 

 nearly meeting above and below, and having a well-marked spine-crest. Upper 

 arm-plates broader than long, of a wide, transverse diamond-shape, with the outer 

 angle much rounded. Disk thick and covered above with large, rather swollen 

 scales, whereof there are three lines in each interbrachial space ; in the centre 

 are six large, somewhat angular, primary plates, separated by single lines of 

 much smaller angular scales ; the lower interbrachial space is covered with fine, 

 thickened scales, from 5 to 8 in the length of 1 mm. Radial shields blunt pear- 

 seed shape, swollen; nearly or quite separated by a wide wedge of two or three 

 scales. Along margin of disk are a few small, peg-like spines. Four stout, 

 smooth, tapering, regular arm-spines, the upper one longest ; lengths to that of 

 a lower arm-plate 1.7, 1.1, 1, .7 : .6. One stout, nearly oval tentacle-scale. 

 Color in alcohol, pale gray. 



Station 170, 520 fathoms, 5 specimens. Station 171, 600 fathoms, 1 speci- 

 men. 



Ophiactis nama sp. nov. 



Plate XIII. Figs. 350-353. 



Special Marks. — Disk-scales coarse, and set with numerous short spines. 

 Radial shields short and triangular. Four stout, cylindrical, tapering arm- 

 spines. One mouth-papilla on each side. Five arms. 



Description of an Individual (Station 174). — Diameter of disk 6 mm. Length 

 of arm about 45 mm. Width of arm near disk 2.2 mm. One large, wide, flat 

 mouth-papilla at base of mouth-angle on each side, and one (which may be 

 called the lowest tooth) at the apex ; this last is broad and rounded, with a 

 minute peak within. Mouth-shields of a much rounded, transverse diamond- 

 shape ; length to breadth 8 : 1.1. Side mouth-shields stout, nearly meeting 



