570 BULLETIN S2, UNITED STATES NATIONAL MUSEUM 



The color, as in the preceding specimen, is violet brown with the cirri and re- 

 generated portions somewhat hghter. 



The specimen from Misaki collected by J. F. Abbott has 41 arms. All of the 

 IIBr and all of the IIIBr series are present, and there is a single IVBr series which is 

 on the inner branch of one of the inner IIIBr series. This specimen approaches C. 

 pinguis in the broadness of its postradial structures, which are only separated laterally 

 by the dorsal portion of Pi, so that the general appearance is more or less like that of 

 C. solaster. 



Mr. Owston's specimen from the Uraga Channel has 22 arms. 



Professor Doflein's specimen from the entrance to Bayami is very large. It 

 possesses exactly 40 arms. 



Of the specimen from Tokyo Bay which he at first called Actinometra morsei 

 Carpenter said that it was a little individual mthout IIIBr series. It has rather 

 shorter axillaries than the type of japonica, and less developed spines on the distal 

 cirrus segments, both of which features are points of resemblance with trichoptera. 

 But Carpenter noted that it seems to have longer brachials than trichoptera, and it 

 shows the carination of the large segments of the distal pinnules which in japonica 

 extends farther out on the arm. 



Under the name of Actinometra japonica var. morsei Hartlaub described a speci- 

 men which he believed to be the one, or at least very similar to the one, noticed by 

 Carpenter as morsei. 



It differs from the one Hartlaub determined as trichoptera in the conspicuous 

 carination of the 4 large basal segments of Pd, and, according to Hartlaub, represents 

 a deviation from the form represented by the type specimen. 



The sharp distal angle of the axillaries which Carpenter gave as characteristic of 

 japonica is strongly marked. The marked length of the axillaries which Carpenter 

 also noted is only partially in evidence. 



The IBr2 (axillaries) are very short. The IIBr and IIIBr axillaries on the single 

 ray on which a IIBr 2 and a IIIBr 2 series are present are also short. All of the other 

 IIBr series are 4 (3 + 4), and their axillaries are markedly longer. 



The specimen is broken, but the number of arms was certainly less than 20. 



Hartlaub said that the most marked difference between this specimen and the 

 type of japonica is that the carination of the pinnule segments is restricted to Pd. 



A specimen from Tokyo Bay collected by Professor Morse and identified by 

 Hartlaub as Actinometra trichoptera undoubtedly represents this species. The cirri 

 are about XL, with the segments averaging 20. There are no IIIBr series. The 

 arms are 20 in number. The brachials are short, with strongly produced distal ends. 

 The distal intersyzygial interval is 4 muscular articulations. P^ shows no carination 

 of the basal segments. The color is a imiform fairly dark brown. 



Hartlaub said that this specimen much resembles in its color and in the characters 

 of its brachials and proximal pinnules specimens of Comanthus parvicirra from Tokyo, 

 but it differs from these, aside from the characters noted above, in that the cirrus 

 segments from about the tenth onward bear a weak spine or tubercle dorsaUy and not 

 a transverse ridge. 



