209 
twice as broad (.lorsoventrally as the proximal; opi)osinof spine lar^^c and prominent, triancriilar, 
arising from the entire dorsal surface of the penultimate set^mient, directed obliquely forward. 
The distal borders of the radials are even with the rim of the centrodorsal ; the I Br 
are short, almost entirely divided in liie median line by the posterior process of the axillary, 
well separated inlerradially, not in contact basall)-. 
The I Br, (axillaries) are rhombic, all the sides strongly concave, about as broad as loner, 
widely separated from their neighbors. 
The lo arms are 45 mm. long; they resemble tho.se of C. scrrata, but the distal edges 
of the brachials, while overlapping and spinous, are much less conspicuously and more fmely 
spinous, and lack the strongly marked longitudinal ridges running inward from each of the 
spinous processes. 
-Syzygies occur between the third and fourth brachials, again between the ninth and tenth 
and fourteenth and fifteenth and distally at intervals of three oblique muscular articulations. 
Pj is 8.5 mm. long, moderately slender, composed of 17 — 18 segments of which the first 
two are broader than long, the third is about twice as long as the median breadth, and the 
remainder are approximately three times as long as broad, and somewhat longer distally ; the 
third and following have slightly projecting and overlapping distal edges, this increasing distally. 
P.-, is much smaller and more slender than 1',, 4 mm. long with 1 i segments of which the first 
two are short, the third is half again as long as broad, and the following rapidly become 
elongated: the segments have moderately produced spinous overlapping distal edges. P^ is 
from 3.0 mm. to 4.5 mm. long with about 11 segments; it tapers less rapidly than P., and 
thus appears stouter, especially distally. Pj is similar to P,, but slightly longer and slightly 
stouter. The distal pinnules are very slender, 7 mm. long with 16 — 17 segments which have 
slightly spinous distal edges. 
5. Conipsoinctra scrj-ata (A. H. Clark). 
A. H. Clark. Bull. Mus. Comp. Zool., vol. 51, 1908, N" 8, p. 240, pi. i, fig. ^(Anledon serrata). 
Proc. Biol. Soc. Washington, vol. 21, 1908, p. 131 [Cotnpsometra serrata). 
Proc. U.S. National Museum, vol. 34, 1908, p. 316 [Compsometra serrata). 
Vidensk. Medd. fra den naturhist. Forening i Kobenhavn, 1909, p. 192 [Compsometra 
serrata). 
6. Conipsoi/ictra loveni (Bell). 
Wright. Proc. Roy. Irish Acad. [2], vol. 2, 1877, p. 754 (1 Kallispongia archerl). 
Bell. Proc. Zool. Soc. London, 1882, p. 534 [Antcdon loveni). 
"Alert" Report 1884, p. 157, pi. 10, figs. B, ^a,b {Antedon piimila; based upon the 
same specimens as the preceding). 
Proc. Linn. Soc. New South Wales, vol. 9, 18S5 [1884], p. 497 (.Intedon pumila). 
P. W. Carpenter. "Challenger" Reports. Comatulae, 1888, p. 56, paragraph 3 {Antedon loveni; 
Antedon pumila). 
Bell. Ann. and Mag. Nat. Hist. [6], vol. 3, 1889, p. 392 \Auledon pumila, part). 
WillTELECGE. Journ. Roy. Soc. New South \Vales, vol. 23, 1889, p. 197 (Antedon pumila). 
P. H. Carpenter. Proc. Roy. Soc. Victoria (N. S.), vol. 2, i8yo, p. 135 (Antedon pumila). 
SIBOGA-EXPEPiriK XLII^. ^7 
