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



and falling away at the sides. The former are oblong, slightly incised, and not united 

 laterally ; the axillaries pentagonal and somewhat wider than long. Ten arms ; the first 

 brachials rather incised by the second, which are relatively short and wide. The 

 following joints smooth and obliquely quadrate, becoming rather elongated towards the 

 end. Syzygies in the third, eighth, and twelfth brachials, and then at intervals of one 

 to four, usually two or three joints. 



The second brachial bears a styliform pinnule of about a dozen longish joints ; and 

 the next two or three pinnules on each side are of the same character, but of 

 diminishing size. The following pinnules increase in length and stoutness, the third and 

 fourth joints being expanded and broadly V-shaped ; the later pinnules are slender and 

 filiform. Disk invisible • the pinnule-ambulacra have abundant sacculi at their sides 

 and also numerous small pieces of calcareous network, which do not, however, form 

 definite plates. 



Colour in spirit, — the arms dirty white, and the pinnules grey with white bands at 

 the joints. 



Spread probably about 18 cm. 



Locality.— Station 320, February 14, 1876; lat, 37° 17' S., long. 53° 52' W.; GOO 

 fathoms; green sand ; bottom temperature, 37°'2 F. 



Remarks. — This species may be at once distinguished from those previously described 

 in the same group by the spiny cirrus-joints and by the expansion of the third and 

 following joints in the genital pinnules, as shown in PI. XIII. figs. 5a, 5b. A similar 

 character presents itself in Antedon gracilis and in Antedon accela, both from Station 

 214, off the Meangis Islands (PI. XV. fig. 4 ; PI. XVI. fig. 2), and also in Hyocrinus 

 bethellianus from the Southern Ocean (Part I. pi. v c . fig. 18 ; pi. vi. fig. 1). But in all 

 these species the ventral side of the genital glands is more or less protected by calcareous 

 plating, which is not the case in Antedon lineata. 



9. Antedon remota, n. sp. (PL XXIX. figs. 5-9). 

 Specific formula — A. — . 



Centro-dorsal sharply hemispherical, bearing twenty to thirty cirri, with nearly 

 twenty joints ; the lower ones are longer than wide and dice-box-shaped, with expanded 

 distal ends, overlapping their successors both dorsally and ventrally. From the tenth 

 joint onwards they are short and laterally compressed with a faint dorsal keel. 



First radials just visible ; the second nearly oblong, rather convex and considerably 

 incised by the rhombic axillaries, which are wider than long, with sharp distal angles, so 

 that the first brachials are not united laterally. Both the axillaries and the two lower 

 brachials have traces of lateral projections. 



