A MONOGRAPH OF THE EXISTING CRINOIDS 275 



P a is similar to P 2 . The pinnules following gradually decrease in length, P 9 being 

 22 mm. long, P 8 18 mm. long, and P 9 16 mm. long. 



In a second specimen the arms are 180 mm. long, and the diameter at the level 

 of the first syzygy is 25 mm. The cirri are XXIV, 34-38 (usually 37), 40 mm. long. 

 The lower pinnules are all broken. 



In a third specimen the arms are 170 mm. long, and the diameter at the level of 

 the first syzygy is 23 mm. The cirri are XXV, 34-37 (usually nearer the latter), 

 40 mm. long. 



In the fourth specimen the arms are 130 mm. long, and the diameter at the level 

 of the first syzygy is 20 mm. The cirri are XXVIII, 34, 40 mm. long. 



The specimen from Sagami Bay (lat. 3515' N., long. 13948' E.) has the arms 

 200 mm. long. The cirri are XXXV, 27-36 (usually about 33), 40 mm. long. 



A specimen from off Misaki has the arms 210 mm. long. The cirri are XXVIII, 

 30-35 (usually 34), 40 mm. long. The pinnules resemble those of the specimen first 

 described from Sagami Bay. The color (in formalin) is yellow. 



The specimen from off Misaki taken in June 1903, has the arms 230 mm. long. 

 The cirri are XXVIII, 29-35 (usually nearer the latter), 40 mm. long. 



In the type specimen from Misaki as described by Hara the centrodorsal is a thick 

 slightly concave disk bearing the cirri in about three rows. The cirri are about 

 XLVI, 33 ; the cirrus segments are tolerably uniform, all broader than long, especially 

 those at the base. The middle and outer segments are slightly compressed laterally. 

 The edges of the cirrus segments are smooth. The radials are scarcely visible. The 

 IBr] are quadrate, convex, with a median tubercle at the junction with the axularies. 

 The IBr 2 (axillaries) are widely triangular (or broadly pentagonal with very short 

 sides adjacent to the base) and are twice as long as the IBr^ The 10 arms are more 

 than 150 mm. in length, and consist of about 150 or more brachials. There is a tu- 

 bercle at the junction of the first and second, and of the second and third. The first 

 syzygial pair and the next following brachials are smooth, rounded, and oblong. 

 The lower brachials have alternating tubercular elevations at their junctions. The 

 outer brachials are obliquely triangular, gradually changing to short quadrate, much 

 broader than long. Sj r zygies occur between brachials 3+4 and 9 + 10, and distally 

 at intervals of 6-10 muscular articulations. P, and P a are 12 mm. long and consist of 

 8-12 segments of which the lower are as long as broad and slender. The middle pin- 

 nules are tolerably uniform, 22-25 mm. long, and consist of 28-30 segments all of 

 which are broader than long, smooth, and rounded; they taper to a filiform end from 

 the stout base. The outer pinnules gradually diminish in length and stoutness, be- 

 coming filiform. They have smooth quadrate segments which are broader than long 

 at the base and as long as broad near the end. The disk is 24 mm. in diameter, and 

 is naked. Sacculi are abundant. The color in life is shining dark purple, in alcohol 

 dark reddish brown. 



Of the three specimens collected by Dr. Th. Mortensen at Misaki in 1.8 meters 

 one had the cirri XXIX, 38-43, from 40 to 55 mm. long and the arms 240 mm. long, 

 and another had the arms also 240 mm. long. 



One of the specimens from Misaki in 55-91 meters hi the Hamburg Museum is 

 purple in color, and resembles the specimens from Japan in the United States National 

 Museum and in the Copenhagen Museum. The other is similar, but slightly smaller. 



