84 BULLETIN OF THE 



one or two on the oi;ter side. The entire surface is microscopically tuberculous. 

 Color in alcohol, straw. 



Station 45, 1240 fathoms, (young.) Station 54, 2650 fathoms, 8 specimens. 

 Station Gl, 2850 fathoms, 12 + specimens. Station 133, 1900 fathoms, 5 

 specimens. 



Ophioglypha convexa sp. nov. 



Plate III. Figs. 83, 84. 



Sjyecial Marks. — Three small tai:)ering arm-spines. Disk, covered above by 

 a rosette of large angular primary plates, radial shields, and a few large inter- 

 Lrachial plates. 



Description of an Individual (Station 241). — Diameter of disk 12 mm. 

 Length of arm 30 mm. Width of arm close to disk, without spines, 3 mm. 

 Mouth-papilla) small, conical, four to six on each side, and three larger at angle 

 of jaw. Mouth-sliield large, much longer than wide, five-sided, with an angle 

 inward, and outer edge, which is wider than inner, much curved ; length to 

 breadth 4 : 3.5. Side mouth-shields short, wider within than without, meeting 

 broadly and c>ccupying only the inner angle of the mouth-sbield. First under 

 arm-plate three-sided, with truncated angles ; beyond they are nearly square, 

 with truncated corners and their lateral sides re-enteringly curved ; those 

 farther out are octagonal, and afterwards hexagonal. Side arm-plates thick, 

 swollen, meeting neither above nor below, except at end of arm. Ujtper arm- 

 plates much broader than long, hexagonal, arched. Disk thick, covered above 

 with a few stout plates. Ra'lial shields angular, pear-seed shape, somewhat 

 sunken, joined without but diverging inward, where they are separated l)y a 

 thick wedge-like scale ; length to breadth 3 : 2. In the interbrachial spaces 

 are five large plates, two on margin of disk, connecting the outer ends of the 

 genital scales ; one quadrangular, connecting the radial shields ; and two 

 smaller, which lie between inner ends of radial shields. The central space is 

 covered by six regular, stout primary plates, elevated above the rest, the central 

 one pentjigonal, the others hexagonal. The genital scales fill the lower inter- 

 brachial space between mouth-shield and arm, and bear on their free edge a 

 close row of s(juare papilla;, which become peg-like on the arm-comb. Beyond 

 the mouth-shield is a row of three small rounded marginal plates. Three 

 short, delicate, tapering arm-spines, equally spaced. Tentacle-])ores within the 

 disk have two or three scales on the inner side, and one or more on the outer. 

 Color in alcohol, yellowish-gray. 



Station 241, 2300 fathoms, 2 specimens (young). Station 240, 2050 fathoms, 

 6 specimens. Station 340, 2350 fathoms, 4 specimens. 



Ophioglypha sculptilis sp. nov. 



IMate IV. Fie*. 115, 110. 



Special Maries. — Six minute arm-spines. First under arm-plate broader 

 than long ; those beyond longer than broad. Radial shields sejiarated within 



