I lO 
following pinnules gradually decrease in size, then increasing in length and becoming very 
slender distally. 
The colour is white, with a faint median line of light pinkish in the proximal half of 
the arms. 
3. Mariametra teiiuipes A. H. Clark. 
A. H. Clark. Ann. and Mag. Nat. Hist., series 8, vol. 10, 1912, p. 32. 
Stat. 294. 10° 12'. 2 S., 124° 27. 3 E. 73 Metres, i Ex. 
The dorsal pole of the centrodorsal is slightly convex, i mm. in diameter, covered with 
small tubercles. 
The cirri are XXVI, 24 — 29, 22 mm. long; the first .segment is short, the second about 
twice as broad as the median length, the third slightly longer than broad to half again as 
long as broad ; the sixth-eighth are about three times as long as the median diameter ; the 
following gradually decrease in length so that the last ten or eleven are about as long as 
their distal diameter, or only very slightly longer; the cirri are exceedingly slender; the long 
proximal segments Bave slightly prominent ends; slight subterminal dorsal spines appear on 
about the eleventh segment. 
The division series and arms in general resemble those of the other species of the 
genus. One IIIBr series is present, external. 
The 15 arms are probably about 45 mm. long. 
The lateral ornamentation of the division .series, which occupies the outer third of the 
exposed surface of the elements of the IBr series thence narrowing distally and disappearing 
at the base of Pj, consists of very numerous small blunt spines, more or less coalescent, which 
show a tendency to become arranged in horizontal rows. 
Pj is 6 mm. long with about 16 segments, small and short. P., is 7.5 mm. long with 
19 segments, resembling P^ but not so stout, though slightly stouter than P,. P., is 11 mm.- 
long with 21 segments, slender, evenly tapering; the first segrnent is not quite so long as 
broad, the second is about as long as broad, and the fifth and following are about twice as 
long as broad, becoming more elongated terminally. P^ is 9 mm. long with 19 segments, 
resembling P^. 
The colour is white with a narrow median line on the division series and arms of 
purple; the cirri are light purplish. 
VI. F"amily Colobometridae A. H. Clark. 
Key to the Genera of the Family Colobometridae. 
a^ P„ (the first inner pinnule) present on all the arms 
b' more than 10 arms; size medium or large; cirrus segments subequal, 
short, bearing dorsally paired spines or tubercles; P., greatly enlarged, 
