1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 293 



outer border evenly curved, and the lateral margins form an obtuse 

 angle. In some of the young specimens of this size there are four 

 minute arm spines on the proximal joints, three of them bein"- placed 

 together near the tentacle-scale. 



Taken oft" the eastern coast of the United States at fourteen stations 

 between hit. 39° 35' and 41^ 47', in 250 to 1,106 fathoms, most ire- 

 quently between 400 and 1,000 fathoms. A single specimen was taken 

 oft' Delaware Bay in 2,033 fathoms, at station 2,038, m 1883. 



This species, when first discovered, was referred to O. confmgosa 

 Lyman, from off" Patagonia, Mr. Lyman himself having made this iden- 

 tification after having examined one of our specimens; but the subse- 

 (juent acquisition of a much larger series leads me to consider the two 

 forms distinct, though closely related. Our form is easily distinguished 

 by the single large plate external to the mouth shields; by the more 

 regular and more closely arranged disk-scales; by differences in the 

 mouth-papill?e and tentacle-scales, and by the somewhat different form 

 of the under arm-plates. In 0. confragosa the radial shields are repre- 

 sented as being decidedly smaller and much more widely separated 

 than in our species, while the large. plate in the interbrachial maro-iu is 

 also much smaller. In the latter there are generally Init three arm- 

 spines, while in the former there are usually four. 



OPHIOGLYPHA (4RANDIS, new species. 



A very large species with a swollen, pentagonal disk, covered with 

 irregular, angular scales and rather small, short, irregular, widely sep- 

 arated radial shields. Arms high, with pentagonal dorsal plates and 

 transversely elliptical ventral plates. Arm-spines three, small, sub- 

 equal; the upper one considerably separated from the two lower ones. 

 Mouth-shields broad, shield-shaped; about as broad as long. Tentacle 

 scales numerous at the base of the arms. 



Disk, in the type specimens, from 23 to 30 mm. in diameter; length 

 of the longest arms, all of which are broken at the tips, more than 1)0 

 mm. 



The disk is generally considerably swollen and plumj), with the inter- 

 brachial margin nearly straight, or a little convex, and with only a 

 slight notch at the bases of the arms, where there are usually no dis- 

 tinct arm-combs, but in those few specimens in which they occur they 

 consist of a single row of from six to eight small, flattened, squarish, 

 scale-like ijapilhe on each side, which decrease in size from below 

 upward. 



The central and other primary plates of the disk are distinguishable, 

 but are only slightly larger than the intervening scales, which arenumer- 

 ous, irregular in size and form, often triangular, and more or less con- 

 vex; the larger ones vary in diameter from 1 to 2 mm.; the primary 

 plates are about 2 mm, in diameter. The radial shields are divergent 



