A MONOGRAPH OF THE EXISTING CRINOIDS 107 



which unfortunately fades strongly in alcohol. He republishcd the original description, 

 adding nothing new, and figured a cirrus and a portion of an arm with four pinnules. 



In a discussion of the adambulacral plates and other details of the pinnules of 

 north Atlantic comatulids published in 1904 Dr. James A. Grieg mentioned that he 

 had had no opportunity to examine the pinnules of Antedon flam, but presumably they 

 are quite different from those of the other species since it belongs to the Granulifera 

 group. 



In a paper published on April 11, 1908, and in another published on May 14, I 

 assigned Antedon flava to the genus Thalassometra, and in two papers published later 

 in the same year Thalassometra flava was given as a characteristic oceanic species. In 

 my review of the family Thalassometridae published in 1909 Antedon flava was listed 

 among the species I was unable to place satisfactorily. 



In 1910 Profs. Rene Koehler and Clement Vaney recorded without comment two 

 specimens of Antedon (Crotalometra) flava from lat. 2539' N., long. 1822' W., in 882 

 meters, that had been dredged by the French steamer Talisman. In my paper on the 

 crinoids of the coasts of Africa published in 1911 I listed Crotalometra flava, giving the 

 synonymy, the African locality, and the range. 



In his memoir on the comatulids of the Blake expedition published in 1912 Dr. 

 Clemens Hartlaub compared this species in detail with C. porrecta, coming to the con- 

 clusion that the differences between them scarcely sufficed for the establishment of a 

 new species. 



In 1913 Dr. W. de Morgan recorded Antedon flava from Huxley station 13, his 

 specimens having been identified by Professor Koehler. 



In my memoir on the unstalked crinoids of the Siboga expedition published in 

 1918 I included flava in my key to the species of the genus Crotalometra and gave the 

 synonymy and range, and in my memoir on the crinoids of the Ingolj expedition 

 Crotalometra flava was listed, with the range. 



In 1927 Professor Koehler included an account of Crotalometra flava in his memoir 

 on the echinoderms of the European seas, and Dr. Theodor Mortensen mentioned it, 

 with its range, in his handbook of the echinoderms of the British Isles. 



Genus AGLAOMETRA A. H. Clark 



Antedon (part) P. H. CARPENTER, Challenger Reports, Zool., vol. 11, pt. 32, 1884, p. 57, and following 



authors. 



Thalassometra (part) A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 360. 

 Crotalometra (part) A. H. CLARK, Proc. U. S. Nat. Mus., vol. 36, 1909, p. 404. 

 Aglaometra A. H. CLARK, Smithsonian Misc. Coll., vol. 61, No. 15, 1913, p. 47 (no diagnosis, and no 



type mentioned; 2 species cited under this generic name, Aglaometra valida and A. incerta); 



Unstalked crinoids of the 5(6o</a-Exped., 1918, p. 146 (in key; range), p. 163 (key to the included 



species). GISLEN, Ark. Zool., vol. 19, No. 32, Feb. 20, 1928, p. 7; Kungl. Fysiogr. Sallsk. Handl., 



new ser., vol. 45, No. 11, 1934, p. 18. 



Diagnosis. -A genus of Thalassometridae in which the arms are dorsally rounded 

 to the tips; the arms are 10 in number; the IBr series and arm bases are rounded dorsally, 

 not carinate, smooth or almost so, without numerous and conspicuous spines; the cirri 

 are recurved distally, the short outer segments carinate or bearing spines dorsally; there 

 is no appreciable expansion of the genital pinnules; and the size is large, the arms being 

 90-150 mm. long and the cirri 45-90 mm. long with 59-70 segments. 



