+} 
16 ‘“ ENDEAVOUR ” SCIENTIFIC RESULTS. 
4 (3+-4), in two instances only, 2; in the dry specimen the: 
distal margins of this series and the preceding are thickened 
and slightly flaring and there is little indication of synarthrial 
tubercles, but in the alcoholic specimen while very slight 
synarthrial tubercles are indicated the joints are all smooth 
and indistinct. IVBr series, when present, 4 (3-+4); not 
present at all in the dry specimen, but four such series are 
present in the alcoholic. Arms 40-44, terete; brachials 
soon become very markedly triangular, with thickened, 
flaring, roughened distal margins, but distally they again 
resume a quadrilateral form and the distal margins are not 
peculiar. A syzygy occurs between 3 and 4 and then at a 
variable distance of 8-16 segments ; after the second syzygy 
there may be a second interval of 8-10 segments, but as a rule 
syzygies become frequent and very regularly spaced, in one 
specimen at intervals of 5 segments and in the other at 6; 
that is, in one specimen each syzygial pair is followed by 3 
normal segments and then another syzygial pair, while in the 
other specimen, 4 normal segments intervene. 
Pinnules long and slender, especially the oral pinnules, of 
which the first exceeds 30 mm. in length and consists of more 
than 70 segments ; succeeding pinnules decreasing in length 
to P, which is only about 15 mm. long and contains only 20-25 
segments. Comb of lowest pinnules consists of about 12-15 
segments ; the combs persist as far as Py on which the comb 
consists of 7 or 8 segments. Basal segments of all pinnules, 
except at very tip of arm, much wider than long; on the 
basal and middle portions of the arm, 3-12 of these widened 
segments are conspicuous for their flaring, spinulose margins, 
which are prolonged on the aboral side into remarkable 
Spinulose spurs ; these spurs are, of course, largest and most 
fully formed on the basal segments (excepting the lowest two) 
of the lowest pinnules; passing distally along the arm, as. 
well as along each pinnule, these spurs become less and less. 
evident and finally disappear. Disk quite fully plated, 
especially along the food-grooves ; the position of the mouth 
cannot be determined in these specimens. Colour (of alco- 
holic specimen) light brown; cirri somewhat lighter than 
arms ; on drying, the colour becomes uniformly light fawn or 
very pale buff. 
This is a very well characterised and remarkable Comanthus, 
related to C. bennetti and C. pinguis, but easily distinguished 
from either, by the curious pinnule segments. The small 
number of arms and the colour will further distinguish it 
from C. bennetti, while the shape of the arms, especially at 
