66 BULLETIN OF THE 



Ophioglypha ferruginea sp. nov. 



Plate III. Fig. 76. 



Special Marks. — Disk rather flat and covered witli imbricated scales. Un- 

 der arm-plates small, widely separated ; much wider than long beyond the 

 second plate, and thereafter constantly diminishing in size. Arm-comb of 

 papilla; more or less needle-like. Arm slightly flattened with spines about 

 as long as a joint. 



Description of an Individual (Station 162). — Diameter of disk 6.5 mm. 

 Length of arm about 22 mm.; width of arm close to disk without spines 

 1.5 mm. Three or four short, pointed, widely separated papillae on each side, 

 and one or two, somewhat longer, at apex of jaw. Mouth-shields longer than 

 wide, pentagonal, with an angle inward, lateral sides straight, outer edge 

 rounding, length to breadth 1.7 : 1. Side mouth-shields nearly straight and 

 narrow, slightly tapering inward, where they meet. First under arm-plate 

 triangular, with an angle inward and outer edge curved ; second one with lat- 

 eral sides curved ; those beyond are much broader than long, with curved 

 outer edge and a small peak within. Side arm-plates slightly swollen, meet- 

 ing broadly below, separated above by upper arm-plates, four-sided, with outer 

 edge roimded, lateral sides straight, and inner side shorter than outer. Disk 

 covered with closely joined, rounded scales of several sizes ; radial shields short 

 pear-seed shape, swollen, nearly meeting without, but separated their entire 

 length by a wedge of one large and three or four smaller scales ; space within 

 the radial shields occupied by a central cluster of six primary plates, separated 

 by minute scales, one or two larger plates in the brachial and interbrachial 

 spaces, with other smaller ones irregularly disposed. Genital scales long and 

 narrow ; along their free edge is a line of very fine bead-like papilla?, becoming 

 short regular spines as the}' pass to the upper surface to form the arm-comb, 

 where the genital scales are much broader ; interbrachial spaces below covered 

 with rows of semicircular swollen plates, varying in size ; at the margin is 

 a large, much swollen plate, broader than long, on either side of which is a 

 smaller oval one. Three long tapering arm-spines, the upper one being 

 slightly longer than the others, and nearly as long as a joint. Tentacle-scales 

 thin, and quite round, — on the large pores of the mouth-tentacles four or five 

 on each side ; on the second three on each side ; third and fourth two on each 

 side ; those beyond have usually one large scale. Color in alcohol, below, 

 white ; above, mottled yellowish brown, and arms barred with the same. 



0. ferruginea is of the strictly typical Ojihiofjlijphce. It is distinguished from 

 0. sinensis by different mouth-shields and thicker disk-scales, and by wanting 

 the water-pores between the basal under arm-plates. 



Station 162, Bass Straits, ,38 fathoms, 3 specimens. Port Jackson, 2-10 fath- 

 oms, 12 specimens. Station 161, 38 fathoms, 1 specimen. Station 188, 28 

 fatboms, 1 specimen. 



