REPORT ON THE OPHITJROIDEA. 129 



times as long as wide, nearly or quite separated. Lower scaling coarse. Seven or 

 eight short, blunt, crowded, very thick arm spines. 



(Type specimen from Station, Simon's Bay, Cape of Good Hope.) Diameter of disk 

 7 mm. Arms about 70 mm. long, and slender; close to disk their width without spines 

 is 1'3 mm. One short wide curved papilla each side of mouth angle, and a pair, stout 

 and bluntly pointed, at the apex of the mouth angle above ; the tentacle scales of the first 

 pair are conspicuous. Mouth shields small, of a wide diamond shape, with outer angle 

 truncated. Side mouth shields much longer than wide, tapering slightly within, where 

 they nearly or quite meet ; outer ends much rounded. Under arm plates nearly square, 

 with rounded corners, and outer edge a little re-enteringly curved. Side arm plates 

 rather thick but not prominent, meeting neither above nor below. Upper arm plates 

 small, narrow, squarish with rounded corners ; narrow within, broader without. Disk 

 round, not very thick, covered with thin, very small overlapping scales ; on the upper 

 surface there are five or six in the length of 1 mm. Radial shields small, of a long pear- 

 seed shape, with outer edge rounded, separated their entire length by a wedge of three 

 rows of crowded, closely overlapping scales. Just outside the radial shields there are 

 numerous fine scales. On the under surface of disk the scaling is much finer, there 

 being about twelve in the length of a millimetre. Eight very short, stout, broad, nearly 

 equal flattened arm spines ; the two upper spines are somewhat broader than the others. 

 Two minute rounded tentacle scales on the side arm plate. Colour in alcohol, pale straw. 



Station, Simon's Bay, Cape of Good Hope ; 10 to 20 fathoms. 



A section of a portion of the disk of a male in the breeding season showed the 

 interior quite crammed with much convoluted spermaries (PI. XLVI. fig. 5, 8,' 8/ 8,'), 

 while the bursa (8) was crowded into a small space. Above was the thick wall of the 

 digestive cavity pushed up against the disk roof and greatly folded (St). The polian 

 vesicle (po), often hard to distinguish, was quite conspicuous. 



Amphiura cajwnsis, Lym. (PI. XVIII. figs. 10-12). 



Amphiura capcnsis, Lju., Oph. Viv. Of. Kong.Akad., p. 320, 1866; Dr. Goes, Oph. Of. Kong. 

 Akad., p. 642, 1871. 



Station 141. — December 17, 1873; Lee's Point, Cape Town; lat. 34° 41' S., long. 

 18° 36' E. ; 98 fathoms ; sand and gravel. 



Amphiura argentea, Lym. (PI. XVI. figs. 7-10). 



Amphiura argentea, Lym., Bull. Mus. Comp. Zool., vol. vL, part 2, p. 21, pi. xi. figs. 

 288-290, 1879. 



Disk scaled on both sides. One tentacle scale. Radial shields very small ; about 

 twice as long as broad. Five or six short, conical arm spines Upper arm plates 

 narrow and rounded. 



