A MONOGRAPH OF THE EXISTING CRINOIDS 571 



A specimen without locality which was described by Hartlaub as a new species 

 under the name of Actinometra spinipinna evidently belongs to C japonica, and 

 probably is one of those collected by Professor Morse in Tokyo Bay. 



The centrodorsal is of medium size with the border sloping sharply inward to the 

 dorsal pole, which is slightly concave. 



The cirri are XXXIX, 16-20. Beyond the 2 basal segments, the cirri have in 

 the proximal half elongated segments which are somewhat constricted centrally. In 

 the distal half the cirri arc laterally compressed and the segments are much shorter. 

 The outermost cirrus segments bear a small dorsal spine. 



The radials are concealed beneath the cirri. The IBr, are short and free laterally. 

 The IBra (a.xillaries) are short and almost triangular with a rather strongly produced 

 distal angle. The IIBr series are 4 (3 + 4). The distal angle of the IIBr axUlaries 

 is also produced. There is a single IIIBr 4 (3 + 4) series. The division series are 

 not in lateral contact. 



The 21 arms are composed of moderately short brachials. The first 5 brachials 

 are more or less shortly discoidal, and those following are somewhat longer and tri- 

 angular with everted and produced distal edges. Toward the end of the arms the 

 brachials become short wedge-shaped and their distal edges are beset with small spines. 



Syzygies occur between brachials 3 + 4, again from between brachials 10+11 to 

 between brachials 13+ 14, commonly between brachials 11 + 12, and distally at inter- 

 vals of 4 muscular articulations. Sometimes there is a syzygy between brachials 

 7 + 8. 



Pd is about 10 mm. long, stout in the proximal half but very slender distally. 

 The comb is short, and is confined to the distal end. The number of segments in the 

 pinnule can not be determined because of the strong perisomic investment, which is 

 also possessed by the pirmules following. The stout segments in the proximal portion 

 bear a process covered with fine spines on the edge toward the arm tip. Similar 

 processes occur on the second pinnule, while on the succeeding brachial pinnules 

 there are developed in their place a few (2 or 3) spine pointed tubercules. The second 

 pinnule is of the same character as the first, but it is somewhat smaller and its comb 

 is less marked. The third pinnule is shorter and bears no comb. The length of the 

 pinnules from the seventh brachial onward is very uniform — about mm. The 

 pinnule of the ninth brachial maj" be somewhat longer than 6 mm. From the seventh 

 brachial on the pinnules are swollen genital pinnules, becoming slender again in the 

 distal half of the arms. 



The anal area and the anal opening cany no papillae. 



The color in alcohol is in general hght yellowish gray brown. In a closer view 

 it is seen that the individual brachials are speckled and that toward the sides, as in 

 their proximal portion, they are lighter. 



Hartlaub considered this supposed new species to be near trichoptera. 



The type spechnen from Japan was thus redescribed by Dr. P. II. Carpenter. 



The centrodorsal is broad, discoidal, and slightly hollowed in the center. It 

 conceals the greater part of the radials and IBr series. 



The cirri are about L, 20. The third segment is longer than broad, and the fifth 

 is the longest. The following decrease slowly in length, the terminal ones being deep 



