A MONOGRAPH OF THE EXISTING CRINOIDS 181 



35 mm. long. The distal intersyzygial interval is 4 muscular articulations. PI is 

 2.5 mm. long with 8 segments. P 3 is 4 mm. long with 1 1 segments which have distinct 

 spiny whorls on the distal ends. P 3 is 3 mm. long with 9 segments. P, is lacking. 

 The disk is 2.5 mm. in diameter. The color is white with one or two small violet spots 

 on each arm. 



The more nearly perfect of the two specimens from "Eastern Asia" has the arms 

 55 mm. long. 



Hartlaub described the specimen from ?Kagoshima Bay examined by him as 

 follows: The centrodorsal is flat discoidal, about 2 mm. in diameter, with the cirri 

 arranged in a single marginal row. The cirri are XII-XV, 18 (only one is preserved), 

 8 mm. long. They are short. The segments are fairly uniform, somewhat longer in 

 the distal than in the proximal half of the cirri, and from the ninth onward bear a 

 dorsal spine. The opposing spine is well developed. The radials are slightly visible. 

 The IB^ are short discoidal, laterally entirely free. The IBr 2 (axillaries) are pentag- 

 onal, rather short, broadening distally. There is a feebly developed synarthrial 

 tubercle. The 10 arms are 40-45 mm. long. The first brachials are short, almost 

 discoidal, interiorly united basally. The second brachials are of similar form and are 

 scarcely longer. The first syzygial pair (composed of brachials 3+4) is likewise 

 short. Following this are three short discoidal brachials, then two or three inter- 

 mediate between these and the markedly triangular brachials. The brachials remain 

 triangular at least to the twenty-second brachial, beyond which the arms are not 

 preserved. All these brachials are short. The union of the brachials as far as the 

 tenth or eleventh is smooth, but then the distal edge acquires a high proximally directed 

 tubercular eversion which suddenly changes the previously smooth dorsal profile into 

 a very rough one. Syzygies occur between brachials 3 + 4, 9 + 10, 14 + 15, and 19+20, 

 though with variations. Thus on one arm they occur between brachials 3+4, 12 + 13, 

 19+20, 24 + 25, and so on. PI is 4 mm. long with 9 segments of which the basal are 

 short and thick, those in the middle are elongated, and the terminal are somewhat 

 shortened; the pinnule is very finely pointed. P is absent. P 2 is at least twice as 

 long as, and markedly thicker than, P,. The best preserved, though unfortunately 

 not entire, P 2 has 9 segments which from the fourth onward are longer than broad 

 and have somewhat thickened very finely dentate distal ends, resembling those of 

 Oligometra serripinna. P 8 is markedly weaker than P 2 ; it is composed of segments of 

 similar form, mostly elongated. It is scarcely longer than P,. P is shorter than P 3 . 

 From this point the length of the pinnules appears to increase, while the thickness 

 becomes very slight. In the distal pinnules the segments, with the exception of the 

 basal, are elongated. The disk is about 5 mm. hi diameter and is deeply incised. 

 Sacculi are numerous and rather large. The color in alcohol is reddish brown with a 

 whitish longitudinal stripe on the dorsal surface of the elements of the IBr series 

 and first brachials. With the eversion of the distal edges of the brachials this stripe 

 passes over into a white spotting. The centrodorsal is light brown, and the cirri are 

 white. Two regenerated arms are entirely uniform white from the point of fracture. 

 The perisome is dark brown. 



In the specimen collected by Professor Doflein near Misaki the cirri are XIII, 

 17-18, from 7 to 8 mm. long; the distal segments are slightly broader than, or about 

 as long as, broad. The arms are 55 mm. long. P s is slender, but stiff, 9 mm. long 



