ANTEDON. 59 
I offer, therefore, the following diagnosis with all reserve, as I 
have not been able to see fully mature specimens of this species. 
c 
A ie 
Allied to A. phalangiwm, but distinguished by having the second 
pinnule smaller than the first. Cirri numerous and long (up to 60 
mm.), with from 31 to 45 joints, and dimorphic. Axillary with a 
strong backward projection, which fits in and over a deep incision 
on the second radial; the second brachial also has a strong back- 
ward projection; the third brachial is a syzygy ; typical number of 
joints in syzygial interval three. 
Measurements. Both our specimens are a good deal broken ; 
Carpenter gives diameter of centrodorsal as 5 mm., and spread as 
17 cm. ; length of first pinnule 15 mm., with 30 joints. 
Colour in spirit pale brown. 
Distribution. North Atlantic (east side) and Arctic Oceans (Kara 
Sea). 25 to 743 fms. 
a. 60° 22' N., 8° 21' W., 327-430 fms. ‘Triton’ Exp. 
b. ? Faeroe Channel. * Porcupine * Exp. 
6. Antedon phalangium. 
Alecto phalangium, J. Mill. Ber. Ak. Berl. 1841, p. 182. 
Comatula (Alecto) phalangium, id. Abh. Ak. Berl. 1849, p. 253. 
Comatula woodwardii, Barrett, Ann. § Mag. xix. (1857) p: 33. 
Comatula celtica, M‘Andrew § Barrett, Ann. § Mag. xx. (1857) 
. 44, 
Gaia phalangium, Duy. § Hupé, Echin. (1862) p. 198. 
Antedon celticus, Norman, Ann. § Mag. xv. (1865) p. 104; Wyv. 
Thoms. Proc. Roy. Soc, Ed, vii. (1872) p. 765; P. H. Carp. Tr. 
Linn. Soc. Lond. ii. (1879) pl. iv. figs. 1-8. 
Antedon mediterraneus, Wyv. Thoms. Proc. Roy. Soc. Ed. vii. (1872) 
». 765. 
waiadon phalangium, P. H. Carp. Tr. Linn. Soe. Lond. ii. (1879) 
p- 29; Marion, Ann. Sci. Nat. viii. (1879) p. 40, pl. xviii. ; 
Ludwig, Mitth. Zool. Stat. Neapel, ii. (1880) p. 53; P. H. Carp. 
Zool, Anz. iv. (1881) p. 521; Bell, Proc. Zool. Soc. 1882, p. 534 ; 
P. H. Carp. P Z, 8. 1882 (1883), p. 746; td. Proc. Roy. Soc. Ed. 
xii. (1884) p. 861; id. Trans. Linn. Soc. ii. (1886) p. 476, pl. 57 ; 
td. Chall. Rep. Com. (1888) p. 158, pl. xxvii. figs. 23-29, pl. xxviii. 
figs. 1-3; Bell, Ann. § Mag. iv. (1889) p. 4383; P. H. Carp. 
Journ. Linn, Soc. xxiv. (1891) p. 67. 
ecg 
c 
Cirri from about thirty-five to forty-five in number, with the 
distal joints shorter than broad, square, or rather longer than 
broad ; specimens with very long joints found in the Mediterranean, 
but not known from the british Seas; with or without a penulti- 
mate spine. The cirri vary in length, and may have as many as 
fifty joints. 
The centrodorsal is large, flattened on its free surface, rounded or 
