MUSEUM OF COMPARATIVE ZOOLOGY. 85 



by a cluster of large scales. Disk high. Bjisal iukIct arm-plates ahoiit as long 

 as broad. Anus high and rounded. 



Descrijition of mi Individual (Station 237). — Diameter of disk 12.5 mm. 

 Width of arm close to disk 3 mm. Mouth-papilkc tive on each side, broader 

 than long, shaped like blunt saw-teeth, with two blunt pointed papillae 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 

 distimce 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 outerl 

 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. Eadial 

 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 papillaj, which become spiniforni where 

 they pass upward to form the arm-comb. Six minute blunt arm-spines, 

 equally spaced along the side arm-plate. Four or five 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 HI. Figs. 70, 78, 79. 



Special Maries. — 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- 

 papilla) 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-sccd shape with an angle within, or of a 

 much roimded pentagonal form with an ajigle within and a curve without ; 



