‘i he Echinoderraata, of dleio himnswich. 29 
ECHINODERMATA. 
Animals having a radial, usually pentamerous ar- 
rangements of parts, a skin bearing spicules and 
hardened, usually to a great degree, by calcareous 
deposits, a digestive canal, a water-vascular ap- 
paratus, and a true vascular system. 
Class I. CRINOIDEA (Ckixoids). 
•Globular or cu'p-sliaped Echhiodermata with segmented arms, hear- 
ing pinnulcE, usually attached by a calcareous segmented stalk, 
with plates on the skin of the dorsal side, and ambulacral 
appendages in the form o f tentacles situated in the omibulacral 
furroios of the disc and ar?ns. 
FAMILY COMATULID.F. 
Stalked only in the young state, adult free, arms ten. 
1. Antedoii Eschrichti, (Muller), Yerrill. Alecto Eschri- 
chtii, Mull, et Trosch. (D). [See Plate, Fig. l.J 
One of the Comatulte.” 
Descripttox. (U) p. 73, (Y) p. 138. 
Figure. (U) pi. YL, (Y) pi. XX YI. 
Distributiox. (a) General ; — From five to six hundred and 
fifty fathoms. Xorth xYtlantic and Arctic Oceans from 
Smith Sound to the Yega. Off Xova Scotia in lat. 43° 4' 
N., long. 04° 5' W. Bay of Fundy(?). 
{h) In N. B waters ; — A single small specimen was taken in 
twenty-five fathoms on a shelly bottom off Duck Island, near 
•Grand Manan, by Dr. Stimiison in 1852. 
This species, as is shown by its distribution given above, is decidedly 
Arctic, and does not belong to the Acadian fauna. Onl}" a single speci- 
men has been yet found, and he who re-discovers it will be fortunate 
indeed. 
It is one of the largest of the Comatulae, some specimens measuring 
twenty inches in extreme diameter with the arms outspread. The 
dorso-central plate bears a great number, even as many as one hundred 
cirrlii, each consisting of from forty to sixty joints, by which it attaches 
itself to the bottom. The mouth is in the centre of the upper (though 
structurally the lower) side, and from it the ambulacral furrows radiate 
to the ten long arms. The latter ordinarily point upwards, and, having 
