42 THE VOYAGE OF H.M.S. CHALLENGER. 



from above the young enclosed in their bursse (PI. XLVII. fig. 2) ; or rather, perhaps, 

 in pockets leading out of the bursas. 



Kerguelen Island ; 20 to 75 fathoms. Off Marion Island ; 50 to 75 fathoms. 



Ophioglypha falcifcra, Lym., Bull. Mus. Comp. Zool, vol. i., part 10, p. 319, 1869 ; 

 vol. v., part 7, p. 99 ; vol. v., part 9, p. 218 ; 111. Cat. Mus. Comp. Zool., No. vi., pi. i. 

 figs. 3-5. 



Station 24.— March 25, 1873 ; off Culebra Island ; 390 fathoms ; mud. 



Ophioglypha flag 'eZZato, Lyrn. (PI. IV. figs. 16-18). 



Ophioglypha flagellata, Lym., Bull. Mus. Comp. Zool., vol. v., part 7, p. 69, pL ii figs. 49-51. 



Disk covered with smooth skin, through which the very small scales are scarcely or 

 not at all visible. Arm spines long, broad, and flat. 



(Type specimen from Station 232.) Diameter of disk 18 mm. Width of arm with- 

 out spines 4 mm. Mouth papillae, four or five on each side, small, tooth-like, separated, 

 growing larger towards the apex of the jaw, where there is one large and club-shaped 

 resembling the teeth above it. Mouth shield small, short, heart-shaped, with projecting 

 corners and angle inward ; length to breadth 27 : 3. Side mouth shields long and narrow, 

 udder without than within, where they do not quite meet. First under arm plate broader 

 than long, triangular or rudely hexagonal, with angles much rounded ; the plates beyond 

 are much wider than long, bounded within by a blunt angle and without by a curve having 

 a little peak at its apex. Side arm plates rather thin, not meeting till some way beyond 

 disk, widely separated above by upper arm plates, which are hexagonal, much broader 

 than long, very flat and thin, with outer and inner edges straight, and ill-marked lateral 

 angles. Disk flat, covered with a thick skin, under which the thin small scales are 

 scarcely, or not at all, distinguishable. Eadial shields very small, rounded, and widely 

 separated; length to breadth 1 : 1*5. Interbrachial spaces below covered by regular 

 rows of very fine, minute scales, extending quite to the margin. Genital scales long and 

 very narrow, almost concealed by the disk scales ; along the free edge is a row of very 

 fine, delicately pointed papilla?, which grow longer as they pass upward to make a short 

 arm comb. Arm spines longer than the joints, flat spatula shape, arranged in a cluster 

 of three just outside the tentacle pores ; of which those of the mouth tentacles are very 

 large, and have six or seven thin, flat scales on each side ; the next three have three long, 

 thin flat scales on the inner side, and one or two very small slender ones on the outer 

 side ; beyond this, three only, on the inner side. Colour in alcohol, disk grey, upper 

 arms yellowish-brown. 



Station 232.— May 12, 1875 ; lat. 35° 11' N., long. 139° 28' E.; 340 fathoms; sandy 

 mud. 



