PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 123 



Also in 1866 Bohlsche described Antedon diibenii from Rio de Janeiro. This name 

 is now emended to duebeni under the rules of nomenclature. 



P. H. Carpenter in 1879 considered the British and the Mediterranean Antedons 

 as specifically identical, but conceded the existence of local varieties. Thus he says 

 that Columna's Crocea zaffarana Neapolitanorum, the crocea of Linck, is the Neapolitan 

 variety, the fonbriata of Barrelier, or the barbata of Linck, another variety from the 

 mouth of the Tiber, and the Decempeda cornubiensium, or the rosacea of Linck, the 

 variety found at Cornwall. 



In 1881 he again discussed the interrelationships of the species of Antedon. Of 

 Antedon mitten, recognized by Wyville Thomson and by Norman, he says that the 

 chief distinction between it and A. rosacea is in the length of the ovaries, which are 

 short and rounded in A. rosacea but long in A. mitten, extending over more than half the 

 length of the pinnules as in Heliomeira (jlacialix. 



He had examined a few specimens of mitten, and was inclined to think the dis- 

 tinction a good one, and that others were con-elated with it. So far as he could see 

 at the time the common Mediterranean form is that with the long ovaries; but a very 

 few specimens with short ovaries were obtained by the Porcupine in the Bay of Bizcrta 

 and on the Skerki Bank. 



Antedon petasus he finds entirely distinct from A. rosacea, with more numerous 

 cirri composed of slightly longer segments, and more quadrate axillarics, longer brachi- 

 als, and more nearly equal PI and P a . 



In the Challenger report (1888) he designates mediterranea as a synonym of rosacea, 

 while he admits as distinct from the latter dubeni and petasus, as well as mitten; but 

 he says "I have no doubt whatever that some of the folio wing are not good species, 

 Antedon dubeni, * * * Antedon mitten, Antedon petasus and Antedon rosacea." 



His last discussion of the question appeared hi 1891. Here he wrote that speci- 

 mens from Madeira are unquestionably identical with those from Brazil; but he found 

 great difficulty in making up his mind as to whether the numerous varieties ranging 

 from the Faroe Channel to Madeira, or even further, shoidd all be referred to one 

 species. Such a species seemed to him to be even more variable than Tropiometra 

 carinata (which in his view included all the small species of Tropiometra) and Comanthus 

 panicirra, which, as he admitted, is saying a good deal; but he was inclined to think 

 that further study would confirm his impression that all these forms represent, but one 

 specific type, to which the following names have been applied at different times: 



adeonae Delle Chiaje fimbriata Barrelier 



annnlala Risso fimbriata Dujardin 



barbata Linck fimbriata Miller 



bicolor Delle Chiaje tgorgonia de Fn-minvillo 



bifida Pennant mediterranea Lamarck 



Carolina Risso milleri J. Muller 



decacnemos Pennant pectinata Linn,' 



decameros Gray pclasus Duben and Koren 



dubeni Bohlsche rosacea Linck 

 europaea Leach 



It is thus clear that he considered the genus Antedon as now restricted to include 

 but a single species. 



In working on the embryology of Antedon at Naples, Bury (1888) found that his 



material differed in many details from that described by Wyville Thomson, details 



656-62267 10 



