A MONOGRAPH OF THE EXISTING CRINOIDS 419 



The arms arc 22-28 in numbrr and resemble those of P. splendida. 



In the type specimen (which has 28 arms) P, is 10 mm. long with 18 segments of 

 which the terminal four or five are abruptly smaller than those preceding; it is con- 

 siderably stouter and more sharply triangular than P, in P. trichopoda. Pj is 1 1 .5 mm. 

 long with 16 segments, strongly though not sharply triangular in section, tapering 

 evenly to a slender tip; the outer segments are about twice as long as broad, without 

 projecting distal edges. P3 is 15 or 16 mm. long with 16 segments of which those in 

 the distal half are much elongated and slender, with prominent spines at the prismatic 

 angles. P4 is 17 mm. long with 15 segments similar to P3 but with a slightly more 

 even taper and hence appearing stouter distally. P5 is 17 mm. long with 14 segments 

 resembling P4. P9 is 16.5 irmi. long with 14 segments resembling P5. P, is 18.5 mm. 

 long with 16 segments resembUng Pj. Pg is shghtly stouter in the ba.«al portion than 

 the pinnules preceding. On the following pinnules the relative length of the stout 

 basal portion increases so that the genital pinnules are broader and more sharply tri- 

 angular than those preceding, with shorter segments of which only the outermost have 

 spines at their prismatic angles. The distal pinnules are about 17 mm. long, becoming 

 gradually shorter toward the arm tips. 



Notes. — -A specimen from Siboga station 117 with 22 arms aliout 95 mm. long is 

 rather larger than the others, in all of which the arms are broken off at the base. P| 

 is 9.5 mm. long with 14 segments. Pj is 11 mm. long with 14 segments. P3 is 15.5 

 mm. long with 17 segments. P4 is 17 mm. long with 15 segments. Pg is 18.5 mm. 

 long with 17 segments. P, is 18.5 mm. long with 16 segments. P^ is 19 mm. long with 

 19 segments. P9 is 19.5 mm. long with 18 segments. P,o is 19 mm. long with 18 

 segments. 



The specimen from Pulo Condor, according to Gisl6n, has the cirri XXXIV, 

 100-105, 75 mm. long. There are 27 arms, with the tips broken. There is a median 

 tubercle on the radials. The synarthrial pairs have a broad and low synarthrial 

 prominence, but there is no, or only a very indistinct, carination. The distal brachials 

 arc moderately cariuate. The intersygial interval is 5 to 7 muscular articulations. 

 The profile of the basal part of the animal is broad. The cirri are dark, brownish 

 violet, the arms of a much hghter shade; the synarthrial prominences are white; the 

 distal portions of the arms are indistinctly blotched with whitish. 



Localities. — Siboga station 117; entrance to Kwandang Bay, Celebes (lat. 1°30' 

 N., long. 122°56' E.); 80 meters; sand and coral; July 12, 1899 [A. H. Clark, 1912, 

 1918] (4, U.S.N.M., E. 423; Amsterdam Mus.). 



Pulo Condor, Cochin China; 5 meters; Dr. C. DawydofT [Gisl^n, 1936). 



Geographical range. — From Cochin China to Celebes. 



Bathymetrical range. — From 5 to 80 meters. 



History. — -This species was described in 1912 from a specimen from Siboga station 

 117. It was redescribed at greater length and figured in 1918, when notes were given 

 on specimens other than the type. 



Dr. Torsten Gisldn in 1936 recorded and gave notes on a single specimen from 

 Cochin China. He noted that it is similar to P. trichopoda, but the profile of the arm 

 bases is broader, and there is not the high and characteristic carination of the dinsion 

 series. 



