290 ^'EW STABFISHES AND OPBIUBANS—VERRILL. 



nevertheless the entire margin of each plate rises into a very evident 

 transverse ridge, very much as in the typical specimens. The arm- 

 spines are a little larger and longer, about one-third as loug as the side 

 arm-plates near the base of the arms. The mouth-shields are also 

 relatively broader aud shorter, though tbey preserve the same general 

 form. The scales on the ventral iuterbrachial areas are more numerous, 

 smaller, and more equal, there being about forty of the larger ones. 



Station 2429, south of Grand Bank, in 471 fathoms (No. 11500, U. S. 

 N. M.,) two sijecimens; station 2528, ofl' George's Bank, in 677 fathoms 

 (No. 11409, U. S. N. M..), one specimen, 1885. 



OPHIOGLYPHA TESSELLATA, new specii-s. 



A large sjjecies allied to 0. confragosa Lyman. 1 )isk pentagonal, with 

 small notches at the bases of the arms, and without any distinct arm- 

 coml). Radial shields irregularly ovate, or subtriangular, well sepa- 

 rated. The rest of the disk is covered with pavement like scales, 

 irregular in size aud form, among which the i)riniary plates can usunlly 

 be distinguished. A large plate lies in the center of the iuterbrachial 

 margin. Mouth-shields pentagonal, bordered distally by another plate 

 nearly as large. 



Arm-spines, generally three, j)apilliform, very small and slender, the 

 upper one widely removed from the others. Tentacles apparently con- 

 fined to a few of the basal joints of the arms. Arms somewhat thick- 

 ened at the base, with swollen joints, rounded above nnd regularly 

 tapered, appearing rather rigid. 



The disk is flattened or moderately swollen, with the interradial 

 margins slightly curved or nearly straight. In young specimens, C to 

 8 mm. in diameter, the primary plates form a pretty regular rosette, and 

 the large marginal iuterradial plates are in contact with the radial 

 shields at each end ; the radial shields are separated by a wedge of 

 three plates in a single row. 



In the largest specimens, which are about 22 nun. in diauieter, with 

 the arms about 05 mm. long, the disk-plates are much more numerous 

 and irregular; the primary plates are rounded, about 1.75 to 2 mm. in 

 diameter, but most of the intervening plates are angular, many of 

 them appearing as if broken, with very small, irregular ones between 

 the larger ones. The disk-plates are slightly thickened, but nearly flat, 

 separated by narrow, rather deep grooves, in which the membrane 

 appears wrinkled. In alcoholic specimens, the disk-scales are more or 

 less obscured by a thin skin. The radial shields are about 4 mm. long 

 and nearly as broad; their inner ends are divergent and form a some- 

 what acute angle; they are separated by six to eight scales, of which 

 two or three are largest, aud by two or three inner dorsal arm-plates. 

 The large median iuterradial plate occupies most of the margin between 

 the radial shields, but has a small supplementary plate at each end. 

 The interradial area, beneath, is largely occuj)ied by the large trap- 



