PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 311 



The third syzygy occurs 5 times between brachials 14 + 15, and 4 times between 

 brachials 15+16. The distal intersyzygial interval is almost invariably 4 muscular 

 articulations. The distal edges of the brachials are almost entirely smooth. 



Pi and P2 are 20 mm. long, slender and flagellate, with 50 very short segments. 

 P3 is 22 mm. long with 46 segments. P4 is somewhat shorter. Pj and Pj are much 

 shorter with the component segments more elongate. The first 4 piimules bear 

 rudimentary terminal combs. 



In the type of hondoensis the cu-ri are XXX-L, 35-40, 40 mm. long. The 

 articulations are rather prominent, and the segments in the distal half bear dorsal 

 spines. 



The IBro (axillaries) are somewhat broader than long. 



The 10 arms are 140 mm. long; the brachials following the pro.ximal oblong series 

 are as long as, or longer than, wide. 



Pi and P2 are 24 mm. long, composed of short and broad segments which become 

 as long as broad after the first 5 or 6; the basal 5 or 6 segments bear high, but short, 

 dentate dorsal processes, those on the different segments being separated from each 

 other by deep notches. P3 is 14 mm. long with rather elongated segments. P5 bears 

 a small gonad which increases in size on the following pinnules. The distal pinnules 

 are long and slender, the component segments with the distal borders set with small 

 spines. 



The position of the thu-d syzygy is very UTegular, between brachials 16 + 17, 

 15+16, or 14 + 15. The distal intersyzygial interval is 3 muscular articulations. 



A very fine nearly perfect specimen collected at the entrance to Tokyo Bay in 

 600 meters on October 27, 1904, by Prof. Franz Doflein has the cirri composed of 

 40 to 48 segments, from 55 to 60 mm. in length. 



The 10 arms are about 175 mm. in length. The distal edges of the brachials are 

 rather strongly produced and very spinous, and the edges of the elements of the IBr 

 series and the lower brachials are everted and spinous. 



Syzygies occur between brachials 3+4, 9 + 10 and 16 + 17, and distally at intervals 

 of 3 muscular articulations. 



Pi is 25 mm. long and is composed of 65 very short segments of which the first 6 

 have the dorsal edge produced into a high thin carination, straight or bilobed, while 

 those in the outer half of the pinnule have the dorsal surface strongly produced, forming 

 a prominent comb. P2 is 26 mm. long with 70 segments, resembling Pi. P3 is 18 mm. 

 long with 41 segments which are proportionately longer than those of the preceding 

 pinnules, while the carination of the basal segnients is slightly less marked and the 

 distal comb is shorter. P4 is 16 mm. long with 38 segments which are proportionately 

 slightly longer than those of P3; the carmation of the basal segments is slightly less 

 marked than in P3, and the distal comb is slightly shorter. P5 is 11 mm. long \vith 19 

 segments, and is slightly stouter and less flagellate than the preceding pinnules, with 

 slightly longer segments; the distal comb is only slightly developed. F, and the 

 following pinnules are similar to P5, but very slightly stouter. P, is 11 mm., P7 is 10 

 mm., and Pg is 10 mm. in length. The distal pinnules are very slender, IS nmi. long 

 with 31 segments. 



Gislen, 1927, gave the following details of the specimens obtained by Dr. Th. 

 Mortensen in the Sagami Sea. 



