C'KINOIDEA. 155 



Antedon bella, Haktlaub. 



Specimens of this beautiful species were dredged at Stations LIII. and LVII. 

 One of those from the first-named station has 28 arms, and the other, now much 

 mutilated, must have had the same number when living, palmars being present on 

 the outer side of both distichal series in three of the rays. The specimens from 

 Station LVII. agree with the type in possessing 20 arms. A specimen of what 

 appears to be Hartlaub's variety brunnea was obtained at the last-named station. 



Antedon okelli, n. sp. Plate, figs. 3 to 5. 



Ceutro-dorsal a moderately thick, roughly circular disk, with flat or very slightly 

 convex dorsal surface, and 1 fearing upon its sloping sides 20 to 25 cirri. These have 

 25 to 28 joints, of which the more distal ones are compressed and carinate, and the 

 penultimate bears an opposing spine (Plate, fig. 4). First radials distinctly visible ; 

 the 2nd broad, well rounded, and forming a tubercular elevation in their median 

 line of junction with the axillaries, which are broadly pentagonal and about 1|- times 

 the length of the 2nd radials (Plate, fig. 3). Two distichals and 2 palmars, the 

 axillaries without syzygy. The palmars are borne upon the outer face of the distichal 

 axillaries of one or both sides of the ray, generally the latter. Median tubercles 

 formed by both distichals and palmars. The rays have slight marginal projections. 

 Twenty-six to 30 arms, of about 120 joints, of which the first 7 or 8 are moderately 

 thick disks. These are followed by rather more than 20 triangular joints, and these 

 again by wedge-shaped ones, which become longer in proportion to their width as the 

 tip of the arm is reached. Syzygies in the 3rd, 13th or 14th, 20th or 21st joints, 

 and then every seventh or eighth joint. 



Of the first pair of pinnules, that borne by the 2nd brachial on the outer side of 

 the ray has 18 to 20 joints, of which only a few of the more distal ones are longer 

 than wide (Plate, fig. 5). Its fellow on the 3rd brachial is smaller and more 

 slender, and has 16 or 17 joints. The pinnule of the 4th brachial has 20 to 22, or 

 even 24 joints. It is considerably stouter and longer than that of the 2nd, and its 

 joints diminish in size more gradually ; while that of the 5th brachial has 19 or 20 

 joints, but in all other respects is precisely like that of the 4th. The 3rd pair of 

 pinnules, borne by the 6th and 7th brachials respectively, are smaller than the 1st, 

 and have 14 to 16 joints. The basal joints of all these pinnules and of the 3 or 4 

 succeeding pairs are distinctly carinate, the latter especially so. The corresponding 

 pinnules on the inner arms of the rays are a little smaller and have slightly fewer joints. 



Colour in spirit creamy white, mottled and striped with deep reddish-brown. 

 Margins of bases of rays and long tubular anal funnel with spots of same colour 

 (Station I.). These are described as "black and white" when living. Others ashy 

 or purplish -grey to deep purple, almost black. In the paler specimens the skeletal 

 joints are marked with narrow bands of deep purple, and the disk has spots of the 

 same colour. Sacculi abundant on pinnules, less so on disk, 



X 2 



