ANTEDON. 55 
vi. (1840) p. 158. 
Astrophyton elizabethe, McIntosh, Proc. Roy. Soc. Edin. 1865-6, 
. 609, fig. 
Adtedad (Comatula, Lamk.) rosacea, Carpenter, Proc. Roy. Soe. 
1876, pp. 211 & 451. 
Antedon europeeus, Greef, SB. Ges. Marburg, 1876, p. 88. 
YounG Srage: Pentacrinus europzeus, J. V. Thompson, Memoir on 
the Pentacrinus europzeus, 1827, 
ANATOMY AND DrvELOPMENT: Allman, Tr. R. Soc. Ed. xxiii. 
(1863) p. 241; Wyv. Thomson, Phil. Trans. 156, (1865) p. 518; 
W. B. Carpenter, Phil. Trans. 157. (1866) p. 671; id. Proc. Roy. 
Soe. Lond. xxiv. (1876) pp. 211 & 451; Greef, SB. Ges. Marburg, 
1876, p. 16; Ludwig, Zeit. f. w. Zool. xxviii. (1877) p. 255; W.B. 
Carp. Proc. Roy. Soc. Lond. xxxvii. (1884) p. 67; Jickeli, Zool. 
Anz. vii. (1884) pp. 346, 366, 448; Marshall, Q. J. M. S. xxiv. 
(1884) p. 507; Perrier, Nouv. Arch. Mus. ix. (1886) p. 53; 
Barrois, Compt. Rend. cii. (1886) p. 1176; id. Ree. Zool. Suis. iv. 
(1888) p. 546. 
be 
A—. 
a 
As at present understood a very variable species. 
Cirri ranging in number from about twenty to nearly forty, never 
as many as twenty joints, but ordinarily fifteen to eighteen. The 
flattened central part of the disk generally bare. The radials 
largely obscured by the cirri, and the first radials quite hidden by 
the centrodorsal; the second, much wider than long, cannot be 
seen till the cirri are removed; the axillary triangular with the 
sharp apex pointing outwards. The first brachial twice as wide 
without as within; the third a syzygy. Succeeding syzygies on 
eighth, twelfth, and then on every third or fourth. Number of 
arm-joints about 150 in an arm 100 mm. long. The arms are 
rather delicate and taper gradually to a very fine line; but some 
specimens are very much stouter, and the arm-joints are almost 
knobbed. The proximal pinnule much the longest, with most of 
its joints much longer than broad; the number of component 
joints varying between thirty-five and forty-five. The succeeding 
pinnules not more or little more than one-half the length of the first. 
The larva pedunculated (‘‘ pentacrinoid stage ”) and fixed. 
Colour very variable, rosy to deep purple, yellow, or orange, or 
mottled and spotted. In spirit brownish or yellowish, or flesh- 
coloured; sometimes differently coloured in different parts; cirri 
ordinarily much lighter. Dried, whitish. 
Length of arms........ 70 85 80 70 
Diameter of disk ...... 7 8 9 75 
Length of Ist pinnule .. 15 15 19 15 
ee ALU loge a, 55 55 55 
Greatest length of cirri.. 10 12 10°5 9°5 
