62 
A. H. Clark. The Crinoids of the Indian Ocean, 19 12, p. 130 [Heterometra bengalensis ; the 
Australian records). 
Proc. Biol. Soc. Washington, vol. 25, 1912, p. 24 [Zygontetra punctata). 
Reichensperger. Abhandl. der Senck. naturforsch. Ges., vol. 35, 191 3, Heft r, p. 83 
[Zygometra punctata). 
A. H. Clark. Die Fauna Siidwest-Australiens, vol. 4, 1913, Lief. 6, pp. 313, 314 [Zygometra 
punctata). 
Smithsonian Miscellaneous Collections, vol. 61, 1913, N" 15, p. 21 [Zygometra punctata). 
H. L. Clark. Carnegie Institution of Washington Publication N" 212, 1915, p. 105 [Heterometra 
delicata). 
Stat. 273. Anchorage off Pulu Jedan, east coast of the Aru Islands (Pearl BanksJ. 13 Metres. 4 Ex. 
The best specimen may be described as follows : 
The centrodorsal is discoidal, thin, with a broad flat circular dorsal pole 2.7 mm. in diameter. 
The cirri are XV, 18 — 19 (usually 18), 9 mm. long; the first segment is very short, 
the second and third about three times as broad as long, the fourth about twice as broad as 
long, the fifth or sixth about as long as broad ; the ne.xt two or three are similar, the following 
decreasing very gradually in length so that the distal ten or eleven are slightly broader than 
long; the sixth and following bear prominent sharp dorsal spines. 
The radials are entirely concealed by the centrodorsal; the IBr^ are very short and 
bandlike, six times or more as broad as long, united to the IBr„ (axillaries) by pseudosyzygy ; 
IBrg low triangular, with the lateral angles slightly truncated, three times as broad as long. 
IIBr series 4 (3 + 4), broad like the IBr series, with straight lateral edges which are more or 
less "wall-sided" and almost or quite in apposition; the lateral outer portions of the ossicles ot 
the division series are roughened or very finely papillose, as in the species ot Mariametra. 
The twenty-one arms are 35 mm. long, comparatively short and rather stout; the first 
brachial is slightly wedge-shaped, three times as broad as the median length, entirely united 
internally; the second is much more obliquely wedge-shaped, twice as broad as the external 
length ; the first syzygial pair (brachials 3 + 4) is slightly longer internally than externally, twice 
as broad as long internally; the following three brachials are oblong, three to four times as 
broad as long; the succeeding are wedge-shaped, twice as broad as long, becoming as long as 
broad terminally; the brachials have rather strongly produced distal edges. 
The disk is entirely covered with a pavement of comparatively heavy calcareous plates 
which may, especially the larger ones on the anal tube, bear short spines or tubercles. 
Pd resembles Pj, and is composed of 20 segments; Pj is about 5 mm. long, rather stout 
basally but in the distal half tapering to a slender tip, composed of 20 segments of which the 
first is about three times as broad as long and the following gradually increase in length 
becoming as long as broad on the ninth and slightly longer than broad terminally; the longer 
proximal segments are rather strongly carinate, the carination having a straight profile which 
is parallel to the long axis of the segments ; the short outer segments have slightly prominent 
distal ends; P^ is similar, but very slightly smaller and shorter; P^ is 2.5 mm. long, composed 
of 12 segments and, except for its small size, is similar to the preceding; P^ is 2 mm. long 
with 12 segments of which the first three are much broader than long, the fourth about as 
long as broad, and the distal twice as long as broad; P^ is 2.5 mm. long with 12 segments, 
