99 
b' tlic first four i^airs of pinnules very stiff, and spine-like; 50 (5 i) arms 1 15 mm. 
long; the extra axillaries are external, so that the arms arc arrano-ed in 
3, 2, 2, 3 order; the cirri are XXX— XXXV, 50—60, 40 mm. ionjr 
(Philippine Islands) erinacea 
b- the proximal pinnules, thoujjjh stiffened, arc- not sjjine-like, endinL,^ in a 
delicate, more or less flagellate tip ; 40 arms 
c' first four or five pairs of pinnules stiffened and elongated; \\ about 
as long as V„ which is markedly longer than K, ; 60 — 80 cirrus 
segments of which those in the outer half (jf the cirri bear small 
dorsal spines (Philippines and New Britain) finschii^) 
c- first six or seven pairs of pinnules stiffened and elongated; P, markedly 
shorter than P, and P., which are of the same length and character; 
47 — 66 cirrus segments, of which the outer three fourths bear prominent 
dorsal spines (Andaman Islands to the P h i 1 i p pines). . . aranea '-) 
I. Oxymetra tenuicirra (A. H. Clark). 
A. H. Clark. Ann. and Mag. Nat. Hist., scries 8, vol. 10, 1912, ^. 12 [Selenemetra tenuicirra). 
Smithsonian Miscellaneous Collections, vol. 60, 1912, N" 10, p. 22, in text {Selenemetra 
tenuicirra). 
Stat. 320. 6°5'S., II4°7'E. 82 Metres, i Ex. 
This species is very closely related to O. Jiiischii from which it differs chiefly in having 
more slender cirri with much longer distal segments, which are nearly or quite as long as 
broad instead of twice as broad as long or even broader as in O. Jinschii, and also longer 
proximal segments the longest of which are about twice as long as broad instead of only 
slightly, if at all, longer than broad. 
The single specimen has 49 arms 150 mm. long; each IIBr series bears two IIIBr series, 
of which the inner bears an internal IVBr series, so that there are 10 arms to each ray arranged 
in 2, 3, 3, 2 order. 
The cirri are XXX\', 69 — 78, 55 mm. to 70 mm long, much more slender than those 
of O. finschii. 
P, is II mm. lonof with 20 — 21' setrments which become about as long as broad on 
the fifth or sixth and twice as long as broad distally; P, is 12 mm. long with 22 segments, 
resembling P,. P., is 10 mm. long with 18 segments.' Pj is 7.5 mm. long with 13 segments; 
the distal taper is more marked than in P,. P. is 7 mm. long with 13 segments, slightly more 
slender than P„ especially in the distal portion. The distal pinnules are 8 mm. long with 
17 segments. 
i) Synonym Himerometra gracilipes A. H. Clark. 
2) Synonym Selenemtlra virii/is A. H. CKirk. 
