A MONOGRAPH OF THE EXISTING CRINOIDS 367 



These two specimens closely resemble others at hand from Western Australia, 

 The cirri are proportionately shorter than in those from Siboya station 33, and the 

 dorsal and ventral profiles of the individual segments are much less concave, so that 

 they appear much smoother, as in the Western Australian variety. 



The largest specimen from the Danish Expedition to the Kei Islands station 1 1 

 has 12 arms 205 mm. long. Two IIBr 2 series are developed, one on each of two 

 adjacent rays. The cirri are XIX, 37H16, 40 mm. long. The first segment is very 

 short and those following gradually increase in length, becoming about twice as broad 

 as long on the sixth and half again as broad as long on the last six or eight. The last 

 23-28 segments have a sharp dorsal spine, which arises from the entire dorsal surface 

 of the segment and is directed obliquely forward, becoming median and almost erect 

 on the two segments preceding the penultimate. 



The two other specimens have the arms 150 mm. long. In one the cirri are XVIII, 

 29-33, 25 mm. long. 



The specimen from the Danish Expedition to the Kei Islands station 196w has 

 the arms 170 mm. long. The cirri are XXV, 30-33, from 30 to 35 mm. long. The dorsal 

 pole of the centrodorsal is gently convex. 



Of the specimens from the Danish Expedition to the Kei Islands station 19, one 

 has 12 arms, two IIBr 2 series being present. Another has 11 arms about 170 mm. 

 long, a single IIBr 2 series being present; the cirri are XIV (with numerous others 

 partially developed), 39-40, 35 mm. long. A third has 11 arms, with one IIBr 3 series; 

 an extra division series of two ossicles is developed on a first brachial. All the other 

 specimens have 10 arms. In three of them the arms are about 170 mm. long. Two 

 others have the arms 80 mm. and 65 mm. long. One is very small, with the arms 25 

 mm. long. 



Dr. H. L. Clark said that this stiff and rather ungainly comatulid is by no means 

 common at Broome, but he met with it several times while dredging, and one speci- 

 men was found at extremely low water in September 1929. The individuals were all 

 adult, with the 10 arms 110-130 mm. long. The cirri are XV-XXX, 28-36. He 

 secured 10 specimens. 



As described by Dr. Torsten Gisle"n the specimen from Mjoberg's station 6 has the 

 cirri XXIX, 28-35. The peripheral cirri have the following numbers of segments: 

 35, with the dorsal spines beginning on the twelfth; 33, with spines from the twelfth; 

 33 (a young cirrus) ; 32, 30, with spines from the eleventh; and 30 (a very young cirrus 

 3 mm. long) ; an intermediate cirrus has 30 segments with spines beginning on the 

 twelfth. The cirri of the apical row have the following numbers of segments: 30 (a 

 young regenerating cirrus); 28, with spines from the nineteenth; 31, with spines from 

 the twelfth; and 28 (a very young cirrus without dorsal spines). The 10 arms are 120 

 mm. long. P, is 7.5 mm. long, with 15 segments. P 2 is 9 mm. long, with 16 segments. 

 P 3 is 9 mm. long, with 16 segments. P 4 is 7.5 mm. long, with 15 segments. P 15 is 7 

 mm. long. P a is 6 mm. long, with 14 segments. P b is 8 mm. long, with 13 segments. 

 P c is 8 mm. long, with 15 segments. The distal pinnules are 9 mm. long, with 20 

 segments. This is a pale-colored specimen. 



The specimen from Mjoberg's station 8 has the cirri XXIII, 26-35. The periph- 

 eral cirri have the following numbers of segments: 35, with spines from the twenty- 

 first; 31, with spines from the nineteenth; 31, with spines from the sixteenth; 29, with 



