PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 123 



Also in 1S66 Bohlsche described Antedon diibenii from Rio de Janeiro. This name 

 is now emended to duebeni imder the rules of nomenclatm-e. 



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 Croeea zajffarana Neapolitanorum, the crocea of Linck, is the Ncapohtan 

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

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

 variety found at Cornwall. 



In 18S1 he again discussed the interrelationships of the species of Antedon. Of 

 Antedon milleri, 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. milleri, extending over more than half the 

 length of the pinnules as in Heliometra glacialis. 



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

 tinction a good one, and that others were correlated 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 Bizerta 

 and on the Skerki Bank. 



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

 citTi composed of slight!}^ longer segments, and more cjuadrate axillaries, longer brachi- 

 als, and more nearly equal Pi and P^. 



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

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

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

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



His last discussion of the question appeared in 1891. Here he wi'ote that speci- 

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

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

 from the Faroe Channel to Madeira, or even further, should 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 

 parvicirra, which, as he admitted, is sajang a good deal; but he was inclined to think 

 that fiu-ther study woidd 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 fimbriala Barrelier 



anmilala Risso fimhriata Dujardin 



barbata Linck fimhriata Miller 



bicolor Delle Chiaje tgorgonia de Freminville 



bifida Pennant mediterranea Lamarck 



coralina Risso milleri J. Miiller 



decacnemos Pennant pectinata Linn6 



decameros Gray petasus 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 embrvology of Antedon at Naples, Bury (1888) found that his 

 material differed in many details from that described by Wj^'illc Thomson, details 



650-622—67^—10 



