"37 
P, is from lo mm. to i i nun. lono-, composed of 29 sej^ments, slender, but not so weak 
as is usual in the genus, and more or less stiffened; the Hrst two .se<,mients are enormously 
enlarged, subequal, three to four times as broad as long, and n(;arly twice as large as the 
corresponding segments on Pj; the third segment occupies about one third of the median distal 
border of the .second, and is about as broad as long; the following segments are slightly longer 
than broad, becoming about as long as broad in the distal half of the pinnule.- P^ is very small 
and weak, not half so long as Pj ; on the inner arms P, resembles P„, and on the outer side 
of the IIBr series it is intermediate between P„ and P,. P, is 11 mm. to 12 mm. long, with 
iS — 21 segments of which the fourlii and following are about twice as long as broad; the 
pinnule is straight and stiff", but not particularly enlarged; the first segment is about three 
times as broad as the median length, about twice as broad basally as the third; the second 
is of about the same length, but is not ([uitc so broad; it bears a slight rcnmded carinate 
dorsal process; the third is about half again as long as broad. On the inner arms P, is the 
longest. On the outer arms P., is 15 mm. long with 17 segments which are more elongate 
than those of P,, nearly or cjuite three times as long as broad; the pinnule is similar to P, 
but very slightly stouter, and the second segment has the carinate process much reduced; the 
first and second segments are not quite so much enlarged, in fact scarcely enlarged at all ; 
the third .segment is narrowly carinate, at least basally. P^ is 11 mm. long with 15 segments, 
those beyond the third much elongated; the second-fourth are .slightly carinate. P. is 9 mm. 
long with 13 segments, resembling Pj, but the component segments are not quite so long; 
there is a .slight production of the distal dorsal border of the outer segments on P,, which 
increases on P. and P,.. P,. is 7 mm. long with 13 segments, resembling P.. P. is 5 mm. long. 
P- and P., become stouter and more sharply prismatic than the preceding, which are rounded 
prismatic. The distal pinnules are rather slender, 8 mm. long with 16 segments of which the 
terminal five are suddenly and disproportionately small and short. 
The disk is lacTiing in all the specimens; the .side- and covering-plates are highly 
developed as in the other species of the genus. 
The colour is sulphur yellow, cros.sed on the arms and cirri with numerous narrow 
purple bands, or yellow, the pinnules with narrow purple bands. 
This species has the broad and patent habit characteristic of the many armed species 
of such genera as Comanthus. The centrodorsal is thin, but very broad, and bears about its 
margin a regular row of stout .strong cirri of which the proximal portions lie all in the same 
plane, the distal portions being recurved. The arms s|jread out horizontally from the caly.\ just 
as the cirri do from the centrodorsal, and so thin is the latter that the dorsal portion of the 
earlier division series rests upon and among the horizontal earlier portions of the cirri. The 
eversion of the borders of the ossicles of the division .series and of the earlier brachials suggests 
the general aspect of such species as Pectinometra fiavopitrpurea. 
3. Neoinetra alec to (A. H. Clark). 
A. H. Cl..\RK. Proc. U.S. Nat. Mus., vol. 39, 191 1, p. 544 {Calometra aUcto). 
Records of the Western Australian Museum, vol. 1, 1914, N" 3, p. 130. 
SIBOGA-EXFEDITIE XLII /;. ' '^ 
