42 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



arms and all the IIBr series present. But if wo compare this with the others we see 

 at once that the greatest irregularity and inconstancy in the division of the postradial 

 series are characteristic of this species. For instance, one of the specimens has two 

 postradial series that divide only once, one with two IIBr series, one with one IIBr 

 and one IIIBr series, and lastly one with 6 arms, making in all 18 arms. But as a rule 

 the postradial series have not more than four arms each. The division series are 

 widely separated and bear on the central border of their outer branches, as in Antedon 

 marginaia {= Stephanometra spicaia), irregular lateral processes. The cirri are note- 

 worthy because of the large number of short segments, and the lower pinnules are 

 remarkable in that those of the second pair are markedly longer than those of the first 

 and thu-d pairs, and the distal edges of their segments are produced and finely dentate. 



In a paper on new unstalked crinoids from the coasts of northeastern Asia pub- 

 lished on September 17, 1907, 1 described Antedon abbotti from a specimen collected by 

 Dr. W. L. Abbott at Pulo Taya in the China Sea. In my first revision of the old 

 genus Antedon published on October 29, 1907, I transferred Hartlaub's Antedon bella 

 and my own Antedon abbotti to the new genus Himerometra. 



In a list of the generic and specific names that have been applied to Kecent crinoids, 

 published on August 25, 1908, 1 gave as the locality for Hartlaub's Antedon bella Noord- 

 wachter Eiland (North Watcher Island), Gulf of Tonkm; but the Noorwachter Eiland 

 from which the specimens came is a small coral island ofl" Batavia, Java, as was stated 

 by Hartlaub. This error arose through checking the locality with an Atlas in which 

 the only Noordwachter Eiland given was the one in the Gulf of Tonkin, at the same 

 time overlooking Hartlaub's allocation of the island. The fact that the specimens 

 had been collected by Dr. J. Brock was also omitted. In the same paper the locality 

 for Antedon bella var. brunnea was given as Amboina, whereas the specimen described 

 under that name was from Noorwachter Eiland, and was taken with the typical 

 specimens of A. bella. 



In a paper on a collection of cfinoids made by the Albatross in the Philippines 

 published on December 23, 1908, I described Himerometra unicornis from station 

 5160, listing additional specimens from stations 5141, 5147, and 5163. I remarked 

 that this new species is most nearly related to H. bella and H. abbotti. In a revision 

 of the family Himerometridae pubHshed on January 9, 1909, I transferred abbotti, 

 bella, brunnea, and unicornis to the new genus Cenometra. In the distribution of the 

 genus Cenometra as given Ceylon refers to Chadwick's record of Antedon bella, which 

 is in reality C. herdmani, and Gulf of Tonkin refers to Noordwachter Eiland. In 

 a second paper on crinoids collected by the Albatross in the Philippines published on 

 May 13, 1909, I described Cenometra delicata from station 5248, recording it also from 

 station 5249, and hsted C. unicornis from station 5108. In a paper on new Recent 

 Indian crinoids published on June 25, 1909, I briefly diagnosed Cenometra insueta, 

 which was based upon a single specimen that had been collected by the Royal Indian 

 Marine Surveying steamer Investigator on the Arrakan coast of Burma. The diagnosis 

 of this new species consisted solely of a comparison of its cirri with those of C. herdmani 

 described on the previous page. In a third paper on crinoids from the Philippines 

 collected by the Albatross pubHshed on February 15, 1911, I recorded Cenometra 

 bella from station 5401 . In my memoir on the crinoids of the Indian Ocean published in 

 1912 I listed Cenometra unicornis, C. delicata, C. abbotti, C. bella, and C. brunnea, giving 



