141 
c' cirri longer tlum tlic arms, composed of loo — 120 segments; an 
indistinct narrow line sometimes traceable on tlic elements of the 
I15r series and the first two l)r;uhials indicates an in(i|)i(,;iu median 
keel (southwestern Japan) uiacropoda 
c- cirri about three fourths as lont,'- as the arms, comi^osed of 80 — yo 
segments; arms 80 mm. long 
d' distal pinnules 9 mm. long, with the outer segments not more 
than twice as long as broad; overlapping spines on the outer 
brachials long, strongly curved, and sharp pointed ; a rounded 
median tubercle on the radials; central portion of the elements 
of the I Br series and first two brachials swollen, but with no 
indication of a median line (southwestern Japan) . aiithus 
d- distal pinnules 13 mm. long, with the outer segments three 
times as long as broad, or even longer; overlapping spines on 
the outer brachials short, not much curved, more or less blunt; 
radials with a dorsoventrally elongate tubercle; IBr .series with 
a faint low median carination' (S a h u 1 B a n k) . acerba 
a- Elements of the IBr series and first two brachials with prominent median keels 
or tubercles 
b' elements of the IBr series and first two brachials with a very high and 
continuous narrow median keel 
c^ the keels on the elements of the IBr series and first two brachials 
are strongly convex in profile view, so that the outline of the lower 
part of the animal is formed by a series of convex scallops (Sahul 
Bank to Timor and the K e i Islands) mirijica 
c" the crest of the keels on the elements of the IBr series and first 
two brachials is straight, parallel with the longitudinal axis of the 
segments; cirri XX, 77 — 86, 60 mm. to 65 mm. long; arms 100 mm. 
long (Philippine Islands) cristata 
b- the IBr, bears a slightly elongated sharp median tubercle, or a short 
median ridge ; the axillary bears three sharp tubercles ; the first two 
brachials each bear a sharp prominent tubercle; cirri XX, 80, 80 mm. 
long; arms 100 mm. long (Kei Islands) longicirra 
I. Asterometra mirijica A. H. Clark. 
Bell. Journ. Linn. Soc. (Zool.), vol. 24, 1893, p. 339 {Antedon longicirra, part). 
A. H. Clark. Proc. Biol. Soc. Washington, vol. 22, 1909, p. 146 [Asterometra mirijica). 
Crinoids of the Indian Ocean, 1912, p. 190, fig 33, p. 192 [Asterometra mirijica). 
Smithsonian Miscellaneous Collections, vol. 61, 1913, N" 15, p. 4^ (Asterometra- mirijica). 
Stat. 260. 2.3 miles N. 63° W. from the northern point of Nuhu Jaan, Kei Islands. 90 Metres. 
3 Ex. 
Stat. 294. io°i2'.2S., 124° 27. 3 K. Timor Sea. 73 Metres. 5 Ex. 
