A MONOGRAPH OF THE EXISTING CRINOIDS 365 



diameter. The cirri are XXIV, 44^47 (usually 46^17), 45 to 50 mm. long. The cirri 

 are rather stout basally but taper very appreciably distally. Rather prominent 

 dorsal spines are developed from the thirteenth or fourteenth segment onward. The 

 cirrus segments are subequal, the longest (in the proximal portion) being slightly broad- 

 er than long. The ends of the segments in the earlier part of the cirri are slightly swol- 

 len and prominent. The synarthrial tubercles are small but sharp and prominent. 

 The disk is almost completely covered with a pavement of rather small plates. 



Another specimen has the arms 130 mm. long and the cirri XIII, 38-40, from 35 

 to 40 mm. long. The longest cirrus segments are half again as broad as long. Dor- 

 sal spines begin on from the fifteenth to the seventeenth segments. 



A third specimen has the arms 115 mm. long and the cirri XIV, 34-4 1 , about 30 mm. 

 long. The longest cirrus segments are half again as broad as long. Dorsal spines 

 begin on from the tenth to the thirteenth segments. On several of the cirri the two 

 to eight spines following the first three or four have a longitudinally elongate chisellike 

 crest, or are longitudinally paired. The color is whitish, becoming purplish toward 

 the ends of the cirri and arms. 



The fourth specimen has the arms 115 mm. long and the cirri XVII, 41-43, from 

 35 mm. to 40 mm. long. The longest cirrus segments are half again as broad as long. 

 Dorsal spines are developed from the twelfth segment onward. The color is purple. 



These specimens, like the type specimen from Ceram, have the cirri much less 

 curved than the others I have examined. They were killed by immersion in fresh 

 water, which may account for this condition. The longest proximal cirrus segments 

 have the most produced distal ends. 



The specimen recorded by Prof. Rene Koehler from the Bay of Amboina was of 

 very large size with the arms 200 mm. long. The cirri were XXXI, 40-42. The first 

 brachials were broader and more swollen than usual. 



The largest of the three specimens collected by Professor Strubell at Amboina is, 

 according to Dr. Reichensperger, perhaps the largest known specimen. The 10 arms 

 are 300 mm. long. The cirri are about XXX, 28-43, from 35 to 40 mm. long, partly 

 of uniform lateral width, and partly more slender proximally. From the fifteenth 

 to the eighteenth segment onward the segments have prominent dorsal spines which 

 are mostly large, more rarely less well developed. The first segment is short, up to 

 twice as broad as long. From the fourth or fifth onward the segm ents are more squarish , 

 but soon again become broader, and distally are about half again as broad as long, not 

 counting the spine. The last segment is about as long as broad, or longer than broad . 

 The radials are almost entirely concealed. Very strong synarthrial tubercles a re- 

 developed on the articulation between the first two brachials. P, is 13 mm. lmi'_-. 

 with 18-20 segments, of which the middle ones are somewhat longer than broad. P 2 

 is up to 16 mm. long, with 22 segments, of which the middle ones, as in P,, are somewhat 

 longer than broad. P 3 is 14 mm. long, with about 18 segments, which from the fourth 

 onward are almost regularly longer than broad. There is some variation in the rela- 

 tive size of the lower pinnules, and P 3 is not always the longest. The form of the 

 brachials and to a lesser extent the relative development of the synarthrial tuberclrs 

 also vary. The disk is 18 mm. in diameter and is very finely granulated. 



In the intermediate specimen the arms are 200 to 220 mm. long. The cirri are 

 XLIII, 35-42, and resemble those of the preceding. The synarthrial tubercles are 



