i63 
Aglaometra A. II. Clark. 
Key to the Species of the Genus Aglaometra. 
a' Cirri relatively slender, less than half as lon^j as the arms 
b' stouter and more rebust; the edges of the segments of the IBr series and 
of the earlier brachials are but very slightly if at all everted, and are armed 
with e.xceedingly fine spines, or are cjuite smooth; arms about 130 mm. long; 
cirri 60 mm. long, witii 62 — 69 segments (Moluccas; 567 Metres) . . zcra 
b- more slender; the edges of the segments of the IBr series and of the earlier 
brachials are more strongly everted, and more prominently spinous; arms 
130 mm. long; cirri more slender than in the preceding, 45 mm. to the 55 mm. 
long, with 59 — 64 segments (Philippine Islands; 612 — 945 Metres). . propiiiqiia 
a- Cirri long and stout, more than half as long as the arms 
b^ large and conspicuous water pores are present, formed by the cutting away 
of the distal angles of the IBr,, and of the first brachials both interiorly and 
exteriorly, and the inner distal angle of the third brachial (the hypozygal 
of the first syz\-gial pair); arms 125 mm. long; cirri 60 mm. to 65 mm. 
long, with 63 — 64 segments (e.\treme western end of New Guinea; 
798 Metres) sulcaia 
b- no water pores; base of animal (IBr series and arm bases) more compact 
c' radials large and conspicuous, more than half as high as the IBr^, the 
plane of their outer surface everywhere nearly parallel with the dorsoventral 
a.xis, forming a band of equal height all around the caly.K between the 
centrodorsal and the IBrj; no subradial clefts; a prominent broad low 
rounded tubercle near the lateral borders of the a.xillaries; arms 150 mm. 
long; cirri X — XX, 66, 90 mm. long (Philippine Islands; S89 
Metres) cupcdata 
c- radials entirely, or mostly, concealed, their central portion recumbent, 
making a very large angle with the dorsoventral axis, never forming a 
regfular and uniform band between the centrodorsal and the IBr, ; con- 
spicuous subradial clefts are present; no tubercles on the dorsal surface 
of the a.xillaries 
d' larsfer and stouter, with longer and stouter cirri ; borders of the ossicles 
of the IBr series and the lower brachials everted and "fringed with 
strong spines;" arms 100 mm. long; cirri 80 mm. long with 65 segments 
(Meangis Islands and Moluccas; 900 — 1264 Metres). . . . valuia 
d- smaller and more slender, with shorter and relatively more slender 
cirri; borders of the ossicles of the IBr series and the lower brachials 
smooth, or nearly so; arms 90 mm. long; cirri 50 mm. long with 70 
segments (Ker mad ec Islands; i i 34 Metres) incerta 
