104 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



porrecta with Antedon (Stiremetra) lusitanica, and in 1895 and 1896 Prof. Rene Koehler 

 compared it with his new species Antedon (Crotalometra) flava. 



In a paper published on April 11, 1908, I assigned porrecta to my new genus 

 Thalassometra described in the preceding year, repeating this in a paper published on 

 May 14. In two other papers published in the same year Thalassometra porrecta was 

 listed as a characteristic species of the oceanic fauna. In a revision of the family 

 Thalassometridae published in 1909 I included Antedon porrecta among the species 

 I was unable to allocate satisfactorily. 



In 1910 Profs. Rene Koehler and Clement Vaney recorded Antedon (Crotalometra) 

 porrecta from a Travailleur or Talisman station in lat. 4519' N., long. 629' W. in 

 1,480 meters, August 30, 1883. The only comatulid dredged at this station was one 

 specimen of this species; with this there were 10 specimens and numerous fragments of 

 Annacrinus m/ville-thomsoni. Crotalometra porrecta, therefore, was the "comatule" 

 mentioned by Captain Parfait and the Marquis de Folin, and figured by Filhol and 

 Marshall. Captain Parfait gave the latitude as 4559' N.; as Filhol gave the locality 

 as off Rochefort this is probably correct. 



In a paper on the crinoids of the coasts of Africa published in 1911 I included 

 Crotalometra porrecta and gave the synonymy and range. 



Speaking of the pentracrinoids from Challenger station 344 Dr. Edwin Kirk wrote: 



Mr. A. H. Clark says that these three specimens identified by Carpenter as A. multispina do no' 

 appear to belong to the same species and, indeed, may be referable to different groups. Furthermore 

 he states that the figures are inaccurate. It scarcely seems probable that the draftsman could go far 

 wrong in regard to the cohnnnals, however, and the evidence of fusion having taken place, though by 

 no means conclusive, still seems fairly good. 



I told Dr. Kirk that these pentracrinoids appear to belong not to multispina but 

 to porrecta, in a different generic group. I did not say that the figures were inaccurate 

 but that it was inaccurate to interpret them as indicating that the centrodorsal is 

 composed of more than a single ossicle. 



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

 Clemens Hartlaub discussed this species in relation to the other species in Carpenter's 

 Granulifera group. He said he had the impression that Carpenter here, as elsewhere, 

 had made too many species, and he suggested that Antedon angusticalyx, A. inaequalis, 

 and A. distincta were really synonymous with Pourtales' A. gmnulifera, though the 

 doubtless different A. porrecta and A. multispina should be retained. He regarded 

 Koehler's Antedon flava as probably a synonym of porrecta. 



In a paper on the crinoids of the British Museum published in 1913 I noted that 

 I had examined one large and two small specimens of Crotalometra porrecta from Challen- 

 ger station 344 and gave notes on them. In my report on the unstalked crinoids of the 

 Siboga expedition published in 1918 porrecta was included in the key to the species of 

 Crotalometra, and the synonymy and range were given. This information was repeated 

 in my report on the crinoids of the Ingolj expedition published in 1923. 



Prof. Torsten Gislen in 1924 discussed certain points in the structure and develop- 

 mental stages of the three pentacrinoids from Challenger station 344, which he identified 

 as the young of Crotalometra porrecta with a query. 



In his handbook of the echinoderms of the British Isles published in 1927 Dr. 

 Theodor Mortensen inserted porrecta in his key to the east Atlantic species of Crotalo- 



