I04 
(juite so long. P„ is 8 mm. long with 2 1 segments which, gradually increasing in length, become 
as long as broad on the third and on the eighth and following twice as long as broad ; the 
pinnule is very slender and delicate. P^ is 12 mm. long with 24 segments, and is e.xactly 
like P.,. P., is very slender, 1 2 mm. long with 2 1 segments of which the first is very short, 
the second is nearly as long as broad, the third is slightly longer than broad, and the following 
slowly increase in length so that the ninth and following are nearly two and one half times 
as long as broad. P, is 6 mm, long with 15 segments, not quite so stout basally as P„ and 
tapering more rapidly. The proximal pinnules, though very slender, are all slightly stiffened. 
The disk is completely covered with a pavement of rather small irregular plates. 
The colour is light gray, with very narrow black bands at the articulations; the cirri 
are white, the distal half light purple ventrally, this increasing in e.xtent distally. 
The second specimen has 23 arms; the division series are broad and sharply flattened 
laterally; the distal ends of the ossicles of the division series and of the brachials are everted, 
producing a curiously rough appearance. The disk is completely covered with small rounded 
calcareous plates. 
It is quite possible that L. regalis is really the young of this species. 
Dichrometra A. H. Clark. 
Key to the Species of the Genus Dichrometra. 
a^ Distal cirrus segments smooth dorsally, or with a slight dorsal carination, 
slightly broader than long; about 20 arms (south er n J apa n) doderleini^) 
2? Distal cirrus segments bearing dorsally tubercles or spines 
b^ distal cirrus segments much longer than broad, bearing a prominent spine 
in the centre of the dorsal surface; about 20 arms (Java Sea). . . . tenuicirra 
\? distal cirrus segments broader than long, usually very much so; 29 — 50 arms 
c^ the distal cirrus segments, which are not greatly broader than long, bear 
obsolete dorsal tubercles; P^ is about as long as P„ ; 40 arms (Moluccas) diinacniata 
c^ the distal cirrus segments, which are much broader than long, bear 
prominent dorsal spines 
d' synarthrial tubercles prominent, though swollen and broadly rounded, 
and the lower brachials slightly swollen, so that the proximal portion 
of the animal presents a rugged and rugose appearance; Pj about 
as long as, or longer than, P^ ; elongated proximal pinnules with the 
component segments short, in large specimens slightly longer than 
broad, in small specimens not becoming twice as long as broad until 
at least the middle of the pinnule (Singapore and the Malay 
Archipelago to Hong Kong, the Pelew and the Ad- 
mi ral ty I sla nd s . . . Jlagcllata-) 
1) Synonym AnlcJon stylifer A. H. Clark. 
2) Synonyms A/^c/o clongala J. Miiller and Anlea'on piikher I.iitken. 
