159 
This species is most closely related to AÅ. ensifer, and, like 
that form, has the disk completely covered with a pavement of 
small plates. It may be distinguished at a glance, however, by the 
longer and much more prominent dorsal spines on the cirrus joints, 
and by the comparatively small size of the synarthrial tubercles. 
Genus Craspedometra A. H. Clark. 
Craspedometra 1909. A. H. Clark, Proc. Biol. Soc. Washington, Vol, 22, p. 8. 
Craspedometra acuticirra (P. H. Carpenter). 
Antedon australis Litken', M. S. 
Antedon Anand 1882. P. H. Carpenter, Journ. Linn. Soc. (Z00l.), 
Vol. 16, p. 509. 
Antedon avetralie 1882,….…P… H.. Carpenter, tom. cit., p,; 510: 
Craspedometra acuticirra 1909. A.H.Clark, Proc. Biol. Soc. Washington, 
V 9 
Sydney, New South Wales: The collection contains the 
specimen mentioned by Carpenter under the name of Antedon 
australis, which he thought might prove specifically distinct (and, 
indeed, cited certain differential characters) from his Å. acuzicirra 
described just before. There can be little doubt that the two are 
identical, however; but to enable others to judge of this question 
for themselves, a detailed account of the specimen is given. 
Centro-dorsal large, thick-discoidal, with a broad flat polar 
area 5 mm. in diameter; cirrus sockets arranged in a single mar- 
ginal row. 
Cirri XVI, 42—46, 45 mm. long, large and stout basally, 
gradually tapering (rather more rapidly in the distal portion) to a 
very slender sharp-pointed tip; first four or five joints about two 
and one-half times as broad as long, then gradually increasing in 
length, becoming about as long as broad at the tenth, then slightly 
longer than broad, becoming, in the last ten or twelve, about 
twice as long as broad; cirri dorsally rounded with no dorsal spines 
nor carination; terminal claw long, about as long as the penultimate 
joint, nearly straight. 
Radials barely visible in the angles of the calyx; I Br, short, 
six or eight times as broad as long, rather longer in the 
