A MONOGRAPH OF THE EXISTING CRINOIDS 275 



Under the name Amphimetra crenulata I published in 1913 notes on the 17 lots 

 of specimens, all but one of which had previously been studied by Bell or Carpenter, 

 or both, in the British Museum, and in 1915 I again discussed the distribution of 

 this species on the Australian coasts. 



In 1916 Dr. Hubert Lyman Clark recorded a fine adult from off Double Island 

 Point, Queensland, the southernmost known locality on the eastern coast of Australia. 



In the report on the unstalked crinoids of the Siboga expedition published in 1918 

 I assigned crenulata to the genus Heterometra, and in a footnote to the key to the 

 species of Heterometra said that crenulata includes Comatula dubia von Graff, 1877, 

 Antedon decipiens and A. irregularis Bell, 1884, Antedon bidentata von Graff, 1884, 

 Antedon dubia P. H. Carpenter, 1888, and Craspedometra aliena A. H. Clark, 1909, 

 with the exception of the 10-armed specimen mentioned in the description of the last 

 named. I also said that this species has usually been recorded as Antedon (or 

 Amphimetra) variipinna, but it is not Antedon variipinna P. H. Carpenter, 1882. 

 Under Heterometra crenulata I recorded and gave notes on nine specimens from 

 Siboga stations 273 and 274. 



Dr. Torsten Gislen in 1919 recorded and gave notes on specimens from Dr. 

 Eric Mjoberg's stations 7 and 11 in northwestern Australia. He called the species 

 Amphimetra variipinna and included in the synonymy Antedon variipinna P. H. 

 Carpenter, 1882, A. crenulata P. H. Carpenter, 1882, A. decipiens Bell, 1884, A. 

 irregularis Bell, 1884, A. dubia P. H. Carpenter, 1888, and A. brockii Hartlaub, 1890, 

 and discussed the status of variipinna and crenulata at considerable length; but he 

 overlooked the fact that Carpenter mentioned the cylindrical segments of the large 

 lower pinnules in variipinna. Under the name Amphimetra crenulata he discussed 

 the structure of this species at considerable length in 1924. 



In 1929 I recorded a specimen, as Heterometra crenulata, from Baudin Island in 

 8-15 fathoms. This specimen is in the British Museum. In 1933 I recorded and 

 gave notes on nine specimens in the Buitenzorg Museum from Borneo, Java, and 

 Sumatra. 



In 1936 Gislen recorded and gave notes on a specimen from Tonkin, another 

 from Annam, and a third from Cambodia. 



In 1938 Dr. H. L. Clark recorded and gave notes on 48 specimens collected by 

 himself at Broome, Western Australia, and 2 collected by Boardman and Livingstone 

 at the Capricorn Islands, Queensland. 



HETEROMETRA PRODUCTA (A. H. Clark) 



Plate 26, Figure 106 



Himeromelra producta A. H. Clark, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 224 (description; 

 Singapore) . 



Amphimetra producta A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 7 (listed); Vid. 

 Medd. Nat. Foren. K0benhavn, 1909, p. 157 (description; Singapore), p. 193 (collected at 

 Singapore by Svend Gad); Ann. Mag. Nat. Hist., ser. 8, vol. 10, 1912, p. 31 (compared with A. 

 [Heterometra] propinqua); Smithsonian Misc. Coll., vol. 60, No. 10, 1912, p. 17 (compared with 

 A. variipinna [Heterometra crenulata]); Crinoids of the Indian Ocean, 1912, p. 40 { = Antedon 

 laevissima Bell, 1902, in part, and Antedon milberti Bell, 1902, in part), p. Ill (synonymy; 

 Singapore; Fadiffolu, Maldives); Smithsonian Misc. Coll., vol. 61, No. 15, p. 23 (FadifTolu; 

 characters) . 



