232 . mr. h. l. clark on some 
Asteroids : — 
Nectria macrobrachia, sp. nov. Frnmia andamanetisis Koeb. 
Pentagonaster stibams H. L. Clark. F. elegans H. L. Clark. 
Stellaster incei Gray. Bunaster litJiodes Fislier. 
Anthenea australice Dod. Petricia obesa, sp. nov. 
Anthenea globigera Dbd. Aaterina burtonii Gray. 
Ophidroids : — 
OpJiiactis savignyi (M. & T.). Ophiothriv stelligera Lym. 
Ophiothrix longi/peda (Lam.). Ophionereis porrecta Lym. 
O. michaeheni Koek. Ophioeoma brevipes Peters. 
O. spongicola Stimpson. OjMoplocus imbricatus (M. & T.j.. 
ECHINOIDS : — 
Prionocidaris baculosa var. anmilifera Salmacis virgulata Ag, & Des. 
(Lam.). Pseudoboletia indiana (Mich.). 
P. bispinosa var. chmensis (Dod.). Tripneiistes gratilla (L.). 
Centrechimis savignyi Qllich,). Seliocidai-is erythrogramma (Val.). 
C serosa* (Leske). Hchinotnetra mathaei Ji\. 
Centrostephanus tenuispinus H. L. Clark. Breynia australasicB (Leach). 
Amblypneustes pallidus (Lam.). 
0£ these 40 species, now known from the Abrolhos Islands, three-fourths- 
may be reckoned as tropical species, for 1 is tropicopolitan, 25 occur in the 
.East Indies, and 4 others occur along the coast of northern or at least north- 
eastern Australia. Of the remaining 10, 7 are endemic and 3 are South 
Australian forms. Of the endemic species, 3 [Nectria macrobrachia, Petricia 
obesa, and Centrostephmms tenuispinus) are most nearly allied to species from 
the southern coasts of Australia. It is evident, therefore, that the Abrolhos 
have received their echinoderm fauna chiefly from the north, and that only 
a very small number of characteristically Australian forms have as yet found, 
a footing among those islands. 
CRINOIDEA. 
COMATELLA NIGRA. 
Actinometra nigra P. H. Carpenter, 1888, ' Challenger ' Comat. p. 304. 
Comatella nigra A. H. Clark, 1908 ; Smithson. Misc. Coll. lii. p. 207. 
A single well-marked specimen dredged off Long Island, Abrolhos. It is. 
nearly black, has 40 arms about 110 mm. long, and the very powerful cirri 
are XXII, 2.5-28. The disk is about 32 nmi. across, orally. This species 
has not been recorded hitherto from western Australia, though it is known 
from the Aru Islands and I found it at the Murray Islands in 1913. 
Comatella stelligera. 
Actinometra stelligera P. H. Carpenter, 1888, ' Challenger ' Comat. p. 308. 
Comatella stelligera A. H. Clark, 1908 ; Smithson. Misc. Coll. lii. p. 207. 
. A single specimen of this northern species was taken on the shores of 
"Wooded Isle. It is bright yellow-brown, in its preserved condition, is. 
