72 BULLETIN OF THE 



below covered bj- irregular overlapping scales. Three slender arm-spines, the 

 longest one nearly as long as a joint, and situated near the junction of the side 

 arm-plate with the upper, and two others similar but shorter near the junction 

 of the side with the under arm-plate. Tentacle- scales small, short, pointed, 

 four or five on each side of mouth-tentacle pore, whence they diminish in 

 number, till just beyond the disk, where there are two on the inner side of 

 each pore. Color in alcohol, gray. 



Station 122, 350 fathoms, 12 specimens. 



Ophioglypha sequalis sp. nov. 



Plate III. Figs. 74, 75. 



Special Marks. — Four very short, peg-like arm-spines, ecjually spaced. Disk 

 thin, with rather delicate scales. Arms slender. 



Description of an Individual (Station 218). — Diameter of disk 10 mm. 

 Width of arm close to disk without spines 1.7 mm. Four or five short, 

 square, separated mouth-papillae on each side, with one much larger and 

 pointed at apex of jaw. Mouth-shields broader than long, with outer edge 

 curved, a blunt angle inward and a slight notch in the lateral sides ; length 

 to breadth 1.3 : 2. Side mouth-shields short and narrow, meeting within. 

 First under arm-plate broad triangular, with outer edge curved and a blunt 

 angle inward ; second plate broader without than within, pentagonal, with 

 an angle inward, outer edge slightly curved, and lateral sides re-enteringly 

 curved ; the rest are broader than Jong, rapidly becoming smaller in size beyond 

 the disk, where they acquire the shape of a transverse oval, with a little peak 

 within and a curve without. Side arm-plates even and of a tubular figure, 

 slightly projecting at their outer edge, meeting widelj' below, separated above 

 at the basal joints by the upper arm-plates, of which the first and second form 

 a wedge with a curved outer edge, filling the notch formed by the arm-combs, 

 and bearing on their lateral sides a row of minute, sharp papilla? ; the rest are 

 long, triangular, with the outer edge curved, and a sharp angle inward, which 

 on the second and third plate is truncated. Disk flat and delicate, covered 

 with very thin, small, closely overlapping scales ; in the centre is a circular 

 primary plate, surrounded by fine irregular scales, then a circle of five primary 

 plates, one in each brachial space, and separating the inner ends of the radial 

 shields, Avhich are long pear-seed shape, and separated the rest of their length by 

 email scales ; in the interbrachial space there is a row of larger rounded plates, 

 of which the outer one is marginal. Interbrachial spaces below covered with 

 thin overlapping scales. Genital scales long and very narrow where next the 

 mouth-shiehl, l)ut gradually growing wider above the arm, where they make a 

 long arm-comb carrying delicate spine-like papilhc ; on the free edge of the 

 genital scale below there is a row of very short, minute, rounded papilla). 

 Four or five minute, blunt arm-spines, equally spaced along the edge of the 

 Bide arm-plate. The pores of the mouth-tentacles and the two pairs beyond 



