ag 
133 
stages are beautifully shown by Dr. Mortensen (Meddelelser. om 
Grønland, vol. 29, Pl. 1, fig. 6) who was the first to prove: con- 
clusively the existence in the Antedonidæ of side and covering 
plates in every way comparable to those of the Thalassometridæ 
and Tropiometridæ. 
Family Comasteridæ. 
Genus Capillaster A. H. Clark. 
Capillaster 1909. A. H. Clark, Proc. Biol. Soc. Washington, Vol. 22, p. 87. 
Capillaster sentosa (P. H. Carpenter). 
;Åctinometra. sentosa, 1888. P.H. Car gg enter, "'"Challenger” Reports, 
—6. 
Vol. 26, Zoology, p. 325, pl. LXVI, 
Comaster sentosa 1908. A.H. Clårk, ml U. S. Nat. Mus., Vol. 33, 'p. 686. 
Singapore. June 15, 1905). Four specimens, agreeing 
with others from the Philippine Islands; one of these has fifty- 
Seven arms 95 mm. long, cirri XX, 30, 25 mm. to 30 mm. long; 
another has sixty,arms 100 mm. long, cirri XVIII, 30, 30 mm. long; 
the remaining ones are similar to these. The colour is very light 
brown. 
April 20, 1906. Three specimens; one specimen has sixty 
arms 90 mm. long, cirri XX, 30, 20 mm. long. The cirrus joints in 
this species as shown by this specimen "develop" after the tenth 
prominent distal edges dorsally, which form sharply serrate trans- 
verse ridges; these ridges gradually become shorter distally, so 
that' the last twelve or thirteen joints bear merely a pair of 
prominent tubercles; the opposing spine is central, subcentral, or 
terminal, erect, or directed slightly forward, stout, rarely reaching to 
more than one-third the diameter of the penultimate joint in height; 
the terminal claw is from half again to twice as long as the 
penultimate joint, stout, abruptly curved basally, becoming straighter 
distally. Another specimen has about 70 arms about 80 mm. long, 
cirri XVI, 25 mm. long, otherwise resembling the preceding; the 
Colour is light brownish, the distal two-thirds of the cirri lighter. 
Ses ne EEN ER NER 
1) Regarding the dates cf. the note at the end of this paper. 
