A MONOGRAPH OF THE EXISTING CRINOIDS 379 



the arms. The lower pinnules are to a greater or lesser extent keeled. The diameter 

 of the disk is 10-12 mm. When dried the disk is usually prominently and often 

 rather coarsely granulated. The anal tube is less conspicuously granulated. The 

 color in life of the dorsal side was white. The cirri more or less extensively, and the 

 ambulacral grooves, were violet, this color sometimes extending onto the sides of 

 individual arms. In alcohol the color is grayish white and dark violet. 



One of the seven specimens from this station is very small with the arms only 

 about 35 mm. long. It was found attached to one of the larger individuals. The 

 cirri are XVII, 17-20, up to 10 mm. long. The fourth segment is already approxi- 

 mately squarish, and those following are almost without exception markedly longer 

 than broad. PI has 10 and P 2 has 12 or 13 segments. The relative length of the 

 individual segments is not quite the same as it is in the pinnules of the larger speci- 

 mens. The synarthrial tubercles are much less developed than in the latter. But 

 there can be no doubt that all seven specimens represent the same species. 



A specimen from Merton's station 10 has the arms 120 mm. long, but the cirri 

 relatively short, not over 20 mm. long, with about 35 segments. The synarthrial 

 tubercles are moderately developed. The pinnules are relatively stout. PI is com- 

 posed of about 14 segments and is up to 8 mm. in length. P 2 is composed of 16 

 segments and is 10 mm. long. P 3 has 16 segments and is 8 mm. long. In none of the 

 other specimens of this species did Reichensperger find such varying proportions in 

 the individual cirrus segments. For instance, there are two P : in which both of the 

 first two segments are much longer than broad, while the third segment is squarish. 

 On the other hand, there are PI with squarish basal segments, the second segment 

 somewhat longer than broad, the third much longer, the fourth abruptly much 

 broader than long, and the fifth and following again markedly longer than broad. 

 There is no trace of regeneration in these pinnules. The color in life of this specimen, 

 as also of two others from the same station, was white, with the ambulacral grooves 

 and the whole of the cirri violet. 



A specimen from between Batu Kapal and Meriri was hi life colored as the 

 preceding. The arms are 70 mm. long. Synarthrial tubercles are only weakly 

 developed. The cirri are only XII, arranged in a single row. Most of the lower 

 pinnules and the anal tube are in process of regeneration. The disk is very promi- 

 nently and coarsely granulated. 



A large specimen from Merton's station 12 has the arms about 140 mm. long, 

 and the cirri up to 35 mm. long with 35-43 segments, which in the relation of length 

 to breadth are almost half way between discoidea and milberti (=tessellata); they can 

 hi no way be described as "slender." In the relation to body size and to arm length 

 they are at least as stout as the cirri of similar specimens of true milberti (=tessellata) . 

 PI is relatively shorter than in the other specimens, and P 2 is not over 9-10 mm. hi 

 length. The color is the same as hi the others. 



A typical example from Siboga station 273 has the arms 115 mm. long and the 

 cirri XV, 32-34, 22 mm. long. The longest cirrus segments are slightly broader than 

 long. The disk is almost completely covered with plates. From this station there 

 are 12 other similar specimens, and two small and immature examples. These speci- 

 mens exactly resemble others at hand from Queensland and from northwestern 

 Australia. The cirri are comparatively slender and taper distally. 



