229 
12. J'sathyroiitctra iinisitata A. H. Clark. 
A. II. Cl.\RK. Records of the Indian .Museum, vol. j , 1912, part 3, N" 26, p. 270 (nomen 
nudum; 7 miles S.E. by S. from Ross Island; 265 fathoms). 
Notes from the Lcyden Mu.seum, vol. 34, 1912, p. 141 {Psatliyroui.n., niusitala). 
Stat. 38. 7° 35.4 S., ii7°28'.6E. Flores Sea. 521 Metres, i Ex. 
Stat. 45. 7°24'S., ii8°i5'.2E. Flores Sea. 794 Metres, i Ex. 
Stat. 178. 2°40'S., 1 28° 37.5 E. Ceram Sea. 835 Metres, i Ex. 
Stat. 314. 7°36'S., 117° 30. 8 E. Flores Sea. 694 Metres, i Ex. 
Stat. 316. 7° 19.4 S., 1 16° 49. 5 E. Flores Sea. 538 Metres. 2 Ex. 
The centrodorsal is small and conical, the sides slightly, if at all, convex; the basal 
diameter is 3.2 mm., the distance from the ape.x to the interradial border 2.4 mm.; live very 
narrow bare areas divide the sides of the centrodorsal into five radial areas ; these at the base 
are rarely half as broad as the adjacent cirrus sockets, and they are more or less encroached 
upon by the cirrus sockets on either side so that their course is usually more or less zigzag 
or irregular; they are scarcely to be recognized otherwise than that the outer columns of 
cirrus sockets in each radial area are slightly separated from the outer columns in the ne.xt 
area, whereas within each area all the columns are closely crowded. 
Each radial area has three columns of cirrus sockets, the two outer of four each, the 
median of two only; the sockets are very closely crowded, the two outer columns coming into 
apposition just Ijeyond the median; at the dorsal pole there are a number of pits representing 
obsolete cirrus sockets, some of which are situated in the interradial furrows; their arrangement 
appears to be in alternating rows instead of in columns. 
No basal rays are visible. 
The radials are even with the edge of the centrodorsal. but e.\tend slightly upward in 
the angles of the caly.x;, where their tips are slightly separated. The IBr, are short, pro.ximally 
nearly four times as broad as long in the median line, but 
decreasing in width distally where they are only about three 
times as broad as long in the median line; they are widely 
separated from their neighbors; the IBr, (axillaries) are rhombic, 
half again as broad as long, with the anterior angle produced; 
the lateral angles extend far beyond the distal lateral angles 
of the IBrj and meet those of their neighbors, forming large 
water pores; the synarthrial tubercle is only slightly indicated. 
The first brachial is three times as long exteriorly as 
interiorly, half again as broad basally as the e.Kterior length; ^^ 
the inner edges are entirely free and make approximately a i.ater.ii vie«- of ii.c centrodorsal .m.i arm 
bases of a specimen of /'j<i//;r/-<>»«/ra »»H//V<j/iJ 
right angle with those of the adjacent first brachials ; the f^^^ „ear the Postilion islands. Enlarged. 
outer sides are in apposition with the outer sides of the first (Courtesy of the U. S. National Museum). 
brachials on the adjacent rays. The second brachial is irregularly quadrate, the two of each 
arm pair in contact interiorly so that a water pore is formed similar to that between the 
ossicles of the IBr series. The first syzygial pair (formed of the third and fourth brachials is 
