180 
This species was found in the Philippine Islands by the 
U. S. Fisheries steamer ,,Albatross", and occurs abundantly along 
the Indian coast to Ceylon, having been recorded also from the 
Red Sea. 
I at first thought that the specimens from Singapore repre- 
sented a distinet species because of the rounded processes on the 
distal ends of the joints of the lower pinnules, these being large 
spines. in serripinna; but the examination of a large amount of 
additional material has shown me that this is a character of great 
variability, and that the form which I have called pulchella is in 
reality nothing but a strongly marked variety, intergrading imper- 
ceptibly into true serripinna, ånd occurring with it throughout 
its range. 
Øligometra imbricata (P. H. Clark). 
Antedon cupuliferus var. Litken, M. S. 
Oligometra imbricata 1908. A. H. Clark. Proc. Biol. Soc. Washington, 
Vol 21 1.228. 
?Tranquebar, India. Two specimens, each with arms 
about 45 mm. long. 
In the original description I have confined myself to an ex- 
position of only the most essential characters of this species, as 
the subjection of the two specimens to a more detailed examination 
would involve a very considerable risk, owing to their poor state 
of preservation. The very strong imbrication of the brachials is, 
however, at the present state of our knowledge, sufficient to distin- 
guish the species at once from all the others of the genus. 
Dr. Hartlaub has identified specimens of Professor Litken's 
cupuliferus which he found in the Hamburg Museum as Oligometra 
serripinna, so that I have thought it best not to use Litken's 
name as the specific designation of this form as it might cause 
confusion. 
EET TEE RR ER SENSE ER SHEET USE ERE je MEE EET TR RE TEE TE TEE EET EEN DENE PEN NE 
| 
