82 BULLETIN OF THE 



irregularly arched, covered above and below with a thick skin, which almost 

 entirely obscures the fine disk-scales and the radial shields, which may be 

 recognized as small, oval, smooth patches near the disk margin, on either side 

 of the arm. Along the edge of the genital opening is a row of minute, closely 

 joined squarish papilla), which extend only to the margin of the disk, the 

 arm-comb being absent. Five very minute, blunt arm-spines, three situated 

 low on the edge of side arm-plate and two above. Olten they are rubbed off, 

 and there seem to be none. Tentacle-scales of the mouth-tentacles similar to 

 mouth-papilla) and on one side, closely continuous with them ; on the first pair 

 there are four or five scales on each side ; on the second five or six on each side ; 

 just outside the disk there are four scales on the inner side and none on the 

 other ; and a short distance beyond there are no scales. Color in alcohol, 

 light gray. 



Station 157, 1950 fathoms, 4 specimens. 



Ophioglypha elevata sp. nov. 



Plate IV. Figs. 87 - 89. 



Special Marks. — Disk high and arched. Arms short and thick. Each 

 under arm-plate has a median, elongated, bead-like swelling. 



Description of an Individual (Station 145). — Diameter of disk 6 mm. Length 

 of arm about 11mm. Width of arm close to disk, without spines, 1.3 mm. Five 

 short, square, closely joined mouth-papillso on each side, and one longer dia- 

 mond-shaped at apex of jaw. Mouth-shield longer than wide, broader without 

 than within, deeply constricted at the sides, and curved at both ends ; length 

 to breadth 1 : .7. Side mouth-shields narrow, of even width, curving round 

 the inner lobe of the mouth-shield and meeting within. First under arm-plate 

 triangular, with angle inward and outer side curved ; second, third, and fourth 

 plates four-sided, with outer edge, which is wider than inner, curved, and 

 lateral sides re-enteringly curved. There is a longitudinal swelling on the 

 under arm-plates which forms a continuous ridge within the disk. Side arm- 

 plates wide, little swollen, constricted within, not meeting below on basal 

 joints; separated above by the upper arm-plates, which are four-sided, much 

 broader than long, wider without than within, with outer and inner edges 

 straight, and lateral sides re-enteringly curved. Disk thick and arched, covered 

 with small, swollen, irregular scales, with one large pentagonal primary plate 

 in centre. Radial shields small, as Avide as long, irregularly triangular, 

 joined their entire length ; length to breadth .7 : .7. Lower interbrachial 

 space filled with small rounded scales ; along llie free edge of the genital scale 

 is a row of very minute pointed papillas, whicli suddenly become long and 

 spine-like as they pass upward to make the arm-comb. Five short blunt arm- 

 ppines, three well up on the edge of the side arm-plate, and two somewhat 

 shorter close to tentacle-jiores. On the mouth-tentacle pores there are two 

 large scales on either side ; the otlior* pores within the disk have three long 

 rounded scales on the inner side, and one very wide, thick, erect scale on the 



