A MONOGRAPH OF THE EXISTING CRINOIDS 155 



segments bear conspicuous carinate processes resembling those on the corresponding 

 segments of P c . P a , situated on the epizygal of the first brachial syzgyial pair, is 

 12 mm. long, stiffened and more or less spinelike, stouter basally than P,, and tapering 

 very slowly. It is composed of 16 segments of which the first is trapezoidal, some- 

 what broader than long, the second is nearly oblong, not quite twice as broad as long, 

 the third is somewhat longer than broad, and those following increase in length be- 

 coming nearly 3 times as long as broad near the tip. The pinnule is not carinate 

 but is strongly rounded dorsally. The third and following segments have the distal 

 edge bordered with fine spines, which increase in size on succeeding segments. There 

 is no trace of carination on the earlier segments. P 2 resembles P». This pair of 

 pinmdes stands out in marked contrast to the other pinnules. P b is 7 mm. long, with 

 17 segments. It is less stout basally than the preceding pinnules, tapers to a delicate 

 tip, and is flexible. Only the five terminal segments are longer than broad. The 

 segments have produced and spinous distal ends. The following pinnules are very 

 small and weak. 



In the specimen from Willebrord Snellius station 123* the cirri are XVII, 13-14, 

 5 mm. long. The first segment is very short, the second is twice as broad as long, 

 the third is half again as broad as long, and the remainder are about as long as the 

 width of their distal ends. The segments are slightly constricted centrally, this 

 constriction becoming obsolete in the distal fourth of the cirri. The opposing spine 

 is slender, sharp, erect, and subterminal, and is equal in height to about half the 

 width of the penultimate segment. The terminal claw is about as long as the penul- 

 timate segment and is rather stout and strongly curved. The radials have their 

 distal border strongly and irregularly tuberculated. All the segments of P c and Pj 

 have high thin-lobed or coarsely serrate carinate processes that decrease in height 

 toward the pinnule tip. P a and P t are 3 .5 mm. long, with 1 1 segments, and are slender. 

 The first segment is crescentic, almost semicircular, twice as broad as long, the second 

 is oblong, twice as broad as long or even broader, the third is half again as long as 

 broad, and those following increase in length, becoming twice as long as broad dis- 

 tally. The second and following segments have the distal edges spinous, especially 

 at the prismatic angles, this spinosity increasing distally. P„ resembles P tt . P 2 

 and the following pinmdes are somewhat shorter and weaker, though only very 

 slightly less stout. This specimen appears to represent E. pinnatus, differing from 

 the type specimen only in features attributable to its smaller size. 



Localities. — Siboga station 310; north of the eastern end of Sumbava, Lesser 

 Sunda Islands (lat. 8° 30' S., long. 119° 07' 30" E.); 73 meters; sand with a few pieces 

 oi dead coral; February 12, 1900 [A. H. Clark, 1912, 1918] (1, Amsterdam Mus.). 



Danish Expedition to the Kei Islands station 53; Dr. Th. Mortensen; 85 meters; 

 sand and coral; May 9, 1922 (1). 



Danish Expedition to the Kei Islands station 54; Dr. Th. Mortensen; 85 meters; 

 sand and coral; May 9, 1922 (6). 



Dr. Th. Mortensen's Pacific Expedition, 1914-1916; off Jolo (Sulu); about 46 

 meters; sand and coral; March 19, 1914 (1). 



Willebrord Snellius station 123*; lat. 10° 29' 00" S., long 126° 44' 00" E.; 

 about 100 meters; October 28, 1929 (1, L. M.). 



Geographical range. — From the Lesser Sunda to the Kei and Philippine Islands. 



