546 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. [44] 



subtrancate in tbo middle, tlu^ inner edge nearly straight or slightly 

 angulated centrally. Moutli-slnelds strongly four-lobed, the inner angle 

 acute, with concave sides, the lateral lobes prominent, subacute, the 

 outer lobe smaller, obtuse, extending somewhat on the iuterbrachial 

 area ; side mouth-shields wide, not very long, somewhat crescent- 

 shaped, the outer margin convexly arched to fit the concave sides of 

 the mouth shield. Mouth-papillae mostly flat and broad, lanceolate or 

 obtuse, three or four on each side besides the infradental ; a slender, 

 smaller one often stands out of line, back of the outermost, which is 

 flatter and more obtuse than the others. Color yellowish brown, with 

 darker blotches on disk and arms. Diameter of disk, 9™™; length of 

 arms, SS™'". Station 2069, in 101 fathoms, off Nova Scotia. Peculiar in 

 the mixture of sharp spines and obtuse thorny stumps on the disk. 

 General appearance much as in 0. bidentata. 



OpMacantha graivulifera Verrill. 1885. 



B. range, 101 to 200 fathoms, off Nova Scotia. 



Disk tive-iobed, covered with small rounded and conical, slightly 

 rough granules; radial shields form ten rather prominent ridges, naked 

 only at the rounded and prominent outer end ; iuterbrachial spaces be- 

 neath scaly, with few granules. Arms rather broad. Arm-spines eight 

 to nine at base of arms, the rows not apx)roximating dorsally ; the upper 

 ones are long, very slender, acute, slightly roughened ; the middle ones are 

 stouter and distinctly thorny; the lower ones much shorter; tentacle- 

 scale small, lanceolate, subacute, except on the two first joints, where 

 they are obtuse and flattened, and sometimes two together ; side arm- 

 plates broadly united ventrally; ventral arm -plates unusually broad 

 and short, especially on the second to seventh joints, where they are 

 transversly oblong, the outer margin nearly straight or slightly emar- 

 ginate, the inner edge with a slight median angle ; farther out they be- 

 come longer, narrower, and somewhat trapezoidal. Mouth-shields small, 

 somewhat cruciform, with a small outer lobe, an obtuse inner angle, and 

 with acute lateral lobes. Side mouth-shields larger, broad, strongly 

 curved, thickened, and minutely grauulose. Mouth-ijapillaj all spini- 

 form, three or four on each side, besides a larger one below the teeth. 

 Color light brownish yellow, with darker blotches on the arms. Diam- 

 eter of disk, 9^'^'^ to ll'"'^^ Easily distinguished by the short, wide, 

 ventral arm-plates and the small, close, granules on the disk. 



OpMacantha enopla Verrill. 1885. 



B. range, 351 to 640 fathoms, 1882, 1883. 



Easily distinguished by having numerous mouth-papillse, the outer 

 ones forming a crowded group at the end of the mouth -angles. The 

 disk is covered with small obtuse or rounded granule-like stumps, 

 slightly spinulated at the end. The arm-spines are long and slender, 

 glassy, seven or eight near the base of the arms, forming a nearly con- 

 tinuous band on the dorsal side. Color in life, orange. 



