3 
10 ‘** ENDEAVOUR ” SCIENTIFIC RESULTS. 
there are more or less evident median tubercles on a dozen or 
fifteen of the terminal segments ; there tend to be two on each 
segment but they are very low and small as a rule. Cirri 
transversely oval in cross-section at base, but soon become 
cylindrical and distally more or less laterally compressed. 
Fully developed cirri have a smooth, polished surface, as 
usual. 
Basals rather prominent, somewhat produced downward 
over the angles of the stem, broadly in contact laterally. 
Radials two or three times as wide as high, with a marked 
proximal angle (between the basals) and a distinctly concave 
distal margin. IBr normally 6 (142, 4+5),! but often 7 
(1+2, 4+5), occasionally 5 (1-+2) and rarely 4 with no 
syzygy. Axillary triangular, almost as high as wide, lateral 
angles truncate, distal angle somewhat rounded. Pinnules 
on second, third and fifth segments and on sixth when seven 
are present. IIBr 6-11, usually 9 or 11, not rarely 7, but 6 
only in one instance; a syzygy between 3 and 4; in one 
instance the syzygy is between 2 and 3 instead. I IFr 
almost always present, 9-21, usually 13 or 15; a syzygy 
between 3 and 4. IVBr often present, 16-27, usually 19 or 
21; more generally present on the outer, than on the inner 
IiIBr series. Arms 45-60 (57 in holotype), with about 140 
brachials after the IVBr series; articular tubercles slightly 
indicated ; dorsal surface smooth; beyond the [Br 
axillary the brachials have somewhat flaring distal margins, 
more or less spinulose at first, but becoming smooth near arm 
tip ; distally the arms are somewhat compressed ; the arms of 
the holotype are more than 200 mm. from the radial to the 
tip. Oral surface of arms with numerous granules and little 
plates, which are particularly crowded along the margins of 
the food-groove. 
Pinnules rather stout, four-sided, somewhat flattened ; each 
segment is more or less concave or hollowed out on both the 
proximal and distal sides ; this is very marked on distal side 
of first pinnule but on the second is nearly wanting, the distal 
margin of the latter being compressed and keel-like ; subse- 
quently the concavity of the distal and proximal sides of the 
pinnules becomes a constant feature ; the oral surface of each 
pinnule is provided with granules which guard the food- 
groove; the terminal half of each pinnule is thus covered 
orally by a double, interlocking series of pointed granules. 
First pinnule (that on IBr2) about 20 mm. long with 17-18 
segments ; second somewhat longer ; third a little longer than 
1. Not counting the radials themselves, of course. 
