REPORT ON THE OPHIUROTDEA. 67 



spines, extending in a close continuous row along outer edge of side arm plate. Tentacle 

 scales short, square, large, and thin. The pores of the mouth tentacles carry five or six 

 on each side ; the pores immediately beyond are very large, and have about four on each 

 side ; beyond the disk they have three or four on the inner side, and one spiniform on 

 the under arm plate. Colour in alcohol, light grey. 



Station 235.— June 4, 1875; lat. 34° 7' N., long. 138° 0' E. ; 565 fathoms ; mud. 



Ophioglypha solida, Lym. (PI. III. figs. 7-9). 



Ophioglyplia solida, Lym., Bull. Mus. Comp. Zool, vol. v., part 7, p. 91, pL v. figs. 120-122, 

 1878. 



Basal under arm plates, beyond the second, about as long as broad, squarish, and 

 with water pores between them. Arms high, with swollen upper arm plates and very 

 small spines. Upper disk covered in great part by rosette of primary plates and by 

 radial shields. 



(Type specimen from Station 192.) Diameter of disk 105 mm. Width of arm close to 

 disk, without spines, 3 mm. Eight minute, widely separated, pointed mouth papillae on 

 each side of angle, with a cluster of three bluntly pointed at apex of jaw. Mouth shields 

 narrow, pear-seed shaped, with sharp angle inward, and outer edge much rounded ; length 

 to breadth 2 : 1 '5. Side mouth shields longer than broad, much wider without than within, 

 where they meet, extending nearly two-thirds of the distance on sides of mouth shield. 

 First under arm plate three-sided, longer than wide, with rounded angle inward, and a 

 slight re-entering curve on all three sides ; the next six or seven plates are broader than 

 long, octagonal, and separated by wide pores or depressions ; the remainder of the under 

 arm plates are quadrangular, with an angle within and without. Side arm plates broad and 

 somewhat swollen, meeting below only towards the tip of the arm ; separated above by 

 the upper arm plates, which are broader than long, and four sided, with lateral sides 

 straight, and outer edge much wider than inner, and curved ; towards the tip of the arm 

 they are diamond shape, with truncated angles without and within. Disk round and 

 high, covered with large, much swollen plates, the central primary being pentagonal, 

 surrounded by five others, large and more or less rounded ; in the upper interbrachial 

 space are two plates, the inner one rounded, the outer marginal one much broader than 

 long, and somewhat swollen. Eadial shields joined, small, and irregular in shape, 

 curved without. Lower interbrachial space covered by two much swollen plates, longer 

 than wide, extending from the outer edge of the mouth shield to the marginal plate. 

 Genital scales much longer than wide, wider without, tapering inward, carrying along 

 their free edge, from the outer edge of the mouth shield to the edge of the disk, 



