56 BULLETIN OF THE 



minute papilloe, to margin of disk. Three stout, blunt, cylindrical, tapering, 

 nearly equal arm-spines, about as long as an arm-joint. Two round, flat, ten- 

 tacle-scales on the side arm-plate, whereof the one next the under arm-plate 

 is much the smaller. Color in alcohol, pale gray. 

 Station 171, 000 fathoms, 1 specimen. 



OPHIOGLYPHA Lym. 

 Ophioglypha meridionalis sp. no v. 



Plate XVI. Figs. 447 - 449. 



Special Marks. — Disk rather flat, covered with large imbricated scales. 

 Arm-comb of minute bead-like papillae, scarcely to be seen above, but con- 

 tinuous along edge of genital scale. Three peg-like arm-spines less than half 

 as long as a joint. Only one tentacle-scale beyond the mouth-tentacles. 



Description of an Individual (Station 320). — Diameter of disk 4 mm. Length 

 of arm about 12 mm. Width of arm close to the disk .7 mm. Five small, 

 short, broad, flat, close-set mouth-papillse on each side of the mouth-angle, and 

 one pointed and similar to the teeth at the apex. Mouth-shields somewhat 

 swollen, about as broad as long, with a curve without and an obtuse angle in- 

 ward. Side mouth-shields short, straight, meeting by their full width within, 

 occupying only the inner angle of mouth-shield. First under arm-plate blunt 

 heart-shaped, quite as large as, or larger than, the second, which is pentagonal, 

 with inner angle truncated, outer side gently curved, and laterals re-enteringly 

 curved ; one third out on the arm the under plates are small, much wider than 

 long, bounded by a broad curve without and with a little peak inward. Side 

 arm-plates large and thick, meeting broadly below beyond the second arm- 

 plate, and touching above beyond the third plate. Upper arm-plates long 

 wedge-shaped, with a clean curve outward and a sharp angle within. Disk 

 rounded, rather flat and only a little arched above, covered by large slightly 

 swollen scales, whereof the primary plates form a conspicuous rosette, radiating 

 from which there usually is, in each interbrachial space, a row of three over- 

 lapping scales. Radial-shields as broad as long, 'sunken, rounded, with a faint 

 angle inward ; joined without, separated by a wedge-scale within ; they are 

 smaller than the large disk-scales. Below, the scales are similar, eight or nine 

 in each interbrachial space. Papillae along edge of genital scale minute, 

 bead-like, and continuous ; only one or two, and sometimes none, can be 

 seen from the upper surface. Three small, nearly equal, peg-like arm-spines, 

 less than half the length of a side arm-plate. Five small, close-set tentacle- 

 scales to pores of mouth-tentacles, three on one side and two on the other ; the 

 pores beyond have but one small, rounded scale. Color in alcohol, straw. 



Station 320, 600 fathoms, 1 specimen. 



The single specimen, though well characterized, was perhaps not fully 

 grown. It is the southern cousin of O. rohusta, from which it diff'ers in shorter 

 arm-spines, more swollen disk-scales, smaller mouth-papillae, and fewer tentacle- 

 scales. 



