241 
dorsal surface aiul borders of the ossicles of the I Br series and lower 
brachials smooth; synarthrial and articular tubercles more or less prominent, 
especially in hirge specimens, giving; the arm bases a nigged appearance; 
arms troni 225 mm. to 230 mm. in length 
c^ more slender; synarthrial and articular tubercles moderately developed; 
Pg as long as P,, tlie intermediate pinnules longer (l>ering Sea and 
the westernmost Aleutian Islands to the ( r u 1 f of Alaska, 
and southward to Monterey Bay, California; 77 — 1 9 1 i 
Metres) asperrinia 
C" stouter; synarthrial and articular tubercles strongly developed; P,, P, 
and P.. of equal length; P^ slightly, P, much shorter (eastern coast 
of Japan, from Y e z o Strait southward to L i n s c h o t e n 
Strait, between Shikoku and Hondo; 959 [? 540! to 1056 
Metres) laodice 
h~ third syzygy rarely between the 14''' and 15''' brachials, usually between 
the 15''' and 16"'^ or 16''' and 17'''; borders of the ossicles of the IBr series 
and lower brachials prominently spinous, and a greater or lesser development 
of spines on their dorsal surface, particularly in the lateral portions; lower 
segments of the proximal pinnules strongly carinate, the carinate processes 
spinous; synarthrial and articular tubercles undeveloped ; arms from 140 mm. 
to 175 mm. long (eastern coast of Japan, from Sendai south- 
ward to Sagami Bay; 126 — 606 Metres) inariae 
a" Third syzygy between the 16"^ and 17''^ brachials 
b' small, the arm being not over 125 mm., and usually not over 100 mm. 
in length ; ossicles of the IBr series and first two brachials with finely 
spinous borders, and with a single, rarely more, prominent spine near the 
outer borders, more rarely also with a few spines scattered over the dorsal 
surface (from southern California southward to Panama Bay; 
102 — 711 Metres) tanncri 
\y larger, the arms being usually about 150 mm. long, and often longer 
c' ossicles of the IBr series and lower brachials entirely devoid of spines 
on the dorsal surface, and without spinous borders 
d' pro.ximal pinnules not swollen basally, P, and P^ being e.xtremely 
slender throughout their entire length, their basal segments with the 
distal angles deeply truncated so that the dorsal border is narrowed 
to a slightly rounded point usually crowned with a few spinelets 
(from southeastern .V 1 a s k a southward to Panama; 11 — 
— 1407 Metres) perpkxa 
d- Pj to Pj distinctly swollen in the first five or si.\ segments, noticeably 
more slender beyond; basal segments with their distal angles but 
slightly truncated, so that the distal border is relatively long and 
SICOC.VE.xrEDlTlE XLII ^. 31 
