ANTEDON. 53 
Key to the Species. 
a. Most proximal pinnules long and whip-like, made 
up of many short joints. 
i, With numerous long cirri ......-..++++ 1. A. eschrichti. 
8. Proximal pinnules short, made up of few short 
joints. ia ee 
cds tere SSS 2. A. bifida. 
i, With less than 20 joints in cirrl.,......... a A a aii 
ne Rte tat, See a 4, A. tenella. 
ii. With more than 20 joints in cirrl........ Rey: bile a. 
iii, With more than 40 joints in cirri........ 6. A. phalangium. 
1. Antedon eschrichti. 
Alecto eschrichtii, J. Miill. Ber. Ak. Berl. 1841, p. 183; id. Arch. f. 
Nat. 1841, p. 142. 
Comatula (Alecto) eschrichtii, td. Abh. Ak. Berl. 1847 (1849), p. 254. 
Alecto eschrichtii, Ziitk, Vid. Medd. 1857, p. 55. 
Alecto glacialis, Walker, J. Dubl. Soc. iii. (1862) p. 70. 
Comatula eschrichtii, Duj. § Hup. Echinod. (1862) p. 199. 
Antedon eschrichti, Loven, fv. Vet.-Ak. Férh. 1866, no. 9, p. 230, 
figs. 7,m; Verrill, Proc. Bost. Soc. N. H. x. (1866) p. 843; Wyv. 
Thoms. Proc. Roy. Soc. Ed. vii. (1872) p. 764; Duncan § Slad. 
Arctic Echin. (1881) p. 73, pl. vi. figs. 1-4; Bell, P. Z. S. 1882, 
p. 534; P. H. Carp. t. ce. p. 743; td. Proc. Roy. Soc. Ed. xii. 
(1884) pp. 364, 374; ad. Bijdr. Dierk. xiii. 6 (1886) p. 5, pl. 1. 
figs. 7-10; Levinsen, Dijmphna-Toytets, z-b. Udbytte, (1887) 
p. 410, pl. xxxv. figs. 7, 8; Carpenter, Chall. Rep. Com. (1888) 
p. 188, pl. i. figs. 8 a-d, pl. xxiv. tigs. 4—14. 
ae 
¢ 
A large, stout species. 
Cirri very numerous, a hundred or more, and covering nearly all 
the hemispherical centrodorsal, of considerable length and made up 
of more than forty, and sometimes nearly sixty joints, none of which 
bear distinct spines. First radials almost hidden, second more or 
less incised to receive the large rhombic axillary, the outer sides of 
which are deeply incurved and leave a piece projecting between the 
bases of the pair of arms. The arms are strong and long, and may 
have as many as 300 joints. First brachial has outer edge much 
deeper than the inner, the distal edge is deeply incurved to receive 
the backwardly projecting tubercle of the second brachial, the third 
a syzygy; the next succeeding joints are triangular, with the 
longest side alternately inner and outer; the eighth joint a syzygy ; 
the successive joints squarer, the twelfth or thirteenth a syzygy, as 
is every successive third or fourth. 
The most proximal pinnules very long, and the constituent 
joints numerous and small ; the dorsal surfaces are coarsely serrated 
near the base and more finely near the free end. The pinnules 
soon become shorter and have much stouter basal joints. 
Colour in spirit brownish to white ; pale when dry. 
