318 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Iii the same year I recorded and gave notes upon six specimens from Kwala 

 Cassan in the Malay Peninsula thai 1 had found in the Hamburg Museum. 



In my report published in 1918 upon the uns talked crinoids collected by the 

 Siboga expedition, phUiberti is included in the key to the species of Heterometra, and 

 in a footnote 1 said that this species includes Amphimetra mortenseni A. H. Clark, 

 1909. A< the Bpeciea was not collected by the Siboga it is not mentioned further. 



HETEBOMETRA SARAE. up. nov. 



Diagnostic features. — There are no IIIBr series. The brachials are exceedingly 

 short, and those in the proximal portion of the arms have the dorsal surface swollen. 

 The cirri are 20-30 mm. long and are composed of 25-33 (usually 30-33) segments of 

 which the longest are about as long as broad and the outer are slightly broader than 

 long and bear a small carinate dorsal spine. The 19 arms are 145 mm. long. The 

 carination on the earlier segments of the enlarged proximal pinnules is almost obsolete. 



Description. — The centrodorsal is discoidal with the bare dorsal pole flat, 5 mm. 

 in diameter. The cirrus sockets are arranged in one and a partial second marginal row. 



The cirri are XII, 25-33 (usually 30-33), from 20 to 30 mm. long. The first 

 segment is ~hort and those following slowly increase in length, becoming nearly or 

 quite as long as broad on the eighth; the succeeding segments are subequal, distinctly, 

 but not greatly, broader than long. On the sixth-ninth and one or two following 

 segments there is a small sharp dorsal tubercle situated in the median line just beyond 

 the middle of the segment; this almost immediately becomes a blunt or sharp small 

 carinate spine with the apex subterminal, on the outermost segments moving to 

 median. The opposing spine is conical, erect, in height equal to about half the width 

 of the penultimate segment. The terminal claw is short, scarcely or not at all exceed- 

 ing the penultimate segment in length, stout, and strongly curved. 



The radials are concealed, or are visible as a thin finely beaded line just above the 

 rim of the centrodorsal. The IBr! are exceedingly short, 8 or 10 times as broad as 

 long, with the proximal and distal edges parallel and the lateral borders in close 

 apposition with those of their neighbors on either side. The IBr 2 (axillaries) are 

 exceedingly short, three and one-half or four times as broad as long, triangular with 

 the lateral angles acute or slightly truncated and the distal edges almost straight. 

 Of the nine HBr series present, seven are 4 (3+4) and two are 2. The division series 

 air broad, in lateral apposition and laterally flattened, and are composed of unusually 

 short segments, the terminal syzygial pair being twice as broad as long or even 

 broader. 



The 19 arms are 145 mm. long. The brachials from the first are extremely 

 short; up to the ninth they have parallel ends, the ends then becoming slightly oblique, 

 and at the end of the proximal quarter of the arm practically parallel again. The 

 earlier brachials have a somewhat swollen dorsal surface, and beyond the basal quarter 

 somewhat prominent, though unmodified, distal ends. 



Pi is 8 mm. long, small and weak, with 26 segments. It tapers rather rapidly in 

 the first six segments and beyond this is delicate and flagellate. The first segment is 

 about two and one-half times as broad as long and those following gradually increase 

 in length to the eighth which, with most of those succeeding, is about as long as broad. 

 P a is 15-18 mm. long, stout, tapering very slowly to the tip, and stiffened, with 25 



