than 12 cirrus segments; the division series usually make a large angle 
with the dorsoventral axis so that the lower part of the animal is broad 
and rounded; from three to six of the segments of the genital pinnules 
are oreatly expanded, forming a roof over the gonads; lo arms (Kei 
Islands and the Molucca Sea to southwestern Japan; 
180—1264 Metres) • Strotometra 
b- laro-er, with at least 15 cirrus segments; the division series usually make 
a relatively small angle with the dorsoventral axis so that lower part 
of the animal is more or less narrow 
c^ the ossicles of the division series and earlier brachials are relatively 
narrow and well separated from their neighbors laterally, but the gap 
between them is more or less completely bridged by a thin flange- 
like lateral production of the dorsolateral borders of the ossicles as 
for as the fourth or fifth brachials ; from three to five of the segments 
of the genital pinnules are greatly expanded, roofing over the gonads; 
10 arms from 100 mm. to no mm. long (Meangis Islands and 
southwestern Japan; 650—900 Metres) Poecilometra 
c- the ossicles of the division series and lower brachials are in close 
apposition, and are sharply flattened against their neighbors 
d^ genital pinnules abruptly expanded, the third and fourth segments 
broad and nearly flat on the outer side, but the fifth smaller; 
IBr series and arm bases diverging at a relatively small angle 
so that the lower part of the animal appears bluntly conical; 
10 arms 90 mm. to 100 mm. long (Kermedec Islands and 
Fiji; ii34__243o Metres) Charitometra 
d" genital pinnules usually only slightly expanded the expansion 
always involving a number of segments and always tapering away 
evenly distally 
e^ arms stout at the base, becoming strongly compressed laterally 
in the outer portion; the mid-dorsal line of each brachial is 
elevated into a broad, high, blunt overlapping spine or tubercle; 
the ossicles of the division series and the first two brachials 
have the central portion elevated so that their dorsal surface 
is in the shape of a broadly V-.shaped gable; the cirrus sockets 
are arranged in one irregular, or two regular, columns in each 
radial area; cirri XV — XXX, 18 — 28, varying from short to 
very long; 10 arms from 75 mm. to 211 mm. in length (Timor 
to the Meangis and Philippine Islands; 520 — 13 14 
Metres) Chondrometra 
e" outer portion of the arms not compressed laterally; the mid- 
dorsal line of the outer brachials may be evenly rounded, or 
