400 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



CYLLOMETRA ALBOPURPUREA A. H. Clark. 

 [For the synonymy, see The Crinoids of the Indian Ocean.] 



1. Japan; Dr. F. Hilgendorf; Cat. No. 2829. — Detached arms. 



DECAMETRA INFORMIS (P. H. Carpenter). 

 [For the synonymy, see The Crinoids of the Indian Ocean.] 



1. Singapore; Prof. E. von Martens; Oat. No. 5353. — One small 

 specimen with arms about 20 mm. long. In this small specimen Pj 

 is composed of longer segments than in the fully grown, and P3 is 

 proportionately shorter. The number of segments m Pj, howe\Ler, 

 and their overlapping and spinous distal edges agree with D. informis, 

 of which this appears to be the yoimg. 



DECAMETRA STUDERI (A. H. Clark). 

 [For the synonymy, see The Crinoids of the Indian Ocean.] 



1. Dirk Hartog Island, Western Australia, 7 fathoms; Gazelle.— 

 One specimen. (See Zool. Anzeiger, vol. 34, No. 11/12, p. 368.) 



DECAMETRA MODICA A. H. Clark. 



Decametra modica A. H. Clark, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 32. 



1. Bagamoyo, German East Africa; Cat. No. 4616. — Three speci- 

 mens. (See Proc. U. S. Nat. Mus., vol. 40, p. 32.) 



DECAMETRA MOBIUSI A. H. Clark. 



Decximetra mobiusi A. H. Clark, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 31. 



1. Mauritius; Prof. K. Mobius; Cat. No. 5349. — One specimen. 

 (See Proc. U. S. Nat. Mus., vol. 40, p. 31.) 



OLIGOMETRA JAPONICA (Hartlaub). 



Antedon japonica Hartlaub, Nachr. Ges. Gottingen, Mai 1890, p. 172. 



1. Japan; Dr. F. Hilgendorf; Cat. No. 5606. — One specimen. 



The cirri are XXI, 21-23 (usually nearer the latter), 11 mm. long; 

 the cirrus segments are subequal, the outer slightly broader than 

 long; on the sixth a subterminal transverse ridge appears whicli 

 becomes median on the last one or two before the penultimate; this 

 transverse ridge is very low and inconspicuous, most conspicuous on; 

 the last two or three segments, where it is very narrow and may 

 become reduced to a small tubercle; the opposing spine is subterminal, 

 and leans slightly anteriorly; it reaches in height about one-third of 1 

 the distal diameter of the penultimate segment. (For a detailed! 

 description of this specimen, see Die Comatulidenfauna des Indischen , 

 Archipels, p. 84, pi. 5,, fig, 49.) 



