MUSEUM OF COMPARATIVE ZOOLOGY. 85 
by a cluster of large scales. Disk high. Basal under arm-plates about as long 
as broad. Arms high and rounded. 
Description of an Individual (Station 237).— Diameter of disk 12.5 mm. 
Width of arm close to disk 3 mm. Mouth-papill five on each side, broader 
than long, shaped like blunt saw-teeth, with two blunt pointed papille at 
apex of jaw. Mouth-shield much rounded, pentagonal, with an angle in- 
ward, and two outer angles almost blended in a wide curve ; length to breadth 
3.5: 2.5. Side mouth-shields narrow, curved, pointed within, where they 
broadly meet. The first under arm-plate broad triangular, with outer edge 
curved, and a blunt angle within ; the next three long axe-shape, with outer 
edge, which is wider than inner, slightly curved, and lateral sides re-enteringly 
curved ; beyond the disk they are similar, but present an angle inward. Side 
arm-plates minutely tuberculous, broad, and swollen, meeting below at some 
distance beyond the disk; separated above by upper arm-plates, of which the 
first is much wider than long ; the second wide semicircular, with outer edge 
curved ; the third narrower, with outer edge curved, and wider than the inner ; 
the rest rounded diamond-shape, with the inner angle longer than the outer. 
Disk thick, covered with thin flat plates; in the centre is a large round pri- 
mary plate, surrounded by five smaller, separated by two or three rows of fine 
scales ; in the interbrachial spaces are three large plates in a line, of which 
the outer is marginal and has usually a round plate on either side. Radial 
shields irregular blunt pear-seed shape, touching without, diverging inward, 
where they are separated by a wedge of three or four small rounded scales. 
Genital scales narrow within, growing much wider without; bearing on 
their free edge a close row of squarish papillae, which become spiniform where 
they pass upward to form the arm-comb. Six minute blunt arm-spines, 
equally spaced along the side arm-plate. Four or fwe small blunt tentacle- 
scales on each side of pores within the disk ; beyond the disk they soon dimin- 
ish to two standing inside of pore. Color in alcohol, light gray. 
Station 237, 1875 fathoms, 2 specimens. 
Ophioglypha variabilis. 
Plate III. Figs. 70, 78, 79. 
Special Marks. — Four or five minute arm-spines. Under arm-plates longer 
than broad. Radial shields separated at inner ends by a single scale. Disk 
high. Basal under arm-plates about as long as broad. Arms high and 
rounded. 
Description of an Individual (Station 195). — Diameter of disk 11.5 mm. 
Length of arm about 40 mm. Width of arm close to disk 2.7 mm. Mouth- 
papille six on each side, of which three are square and three pointed and one 
larger and diamond-shaped at apex of jaw ; they are all low and somewhat 
irregular. Mouth-shield blunt pear-seed shape with an angle within, or of a 
much rounded pentagonal form with an angle within and a curve without ; 
