330 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



In 1897 Prof. Hermann von Ihering recorded Antedon brasiliensis from the Ilha 

 de Sao Sebastiao in southern Brazil. 



In his memoir on the echinoderms of the Zanzibar region published in 1899 

 Prof. Hubert Ludwig noted that this species had been recorded from Zanzibar by 

 Pourtales (1879) and Rathbun (1879), and from Madagascar and the Seychelles by 

 P. H. Carpenter (1888). 



Prof. Sir D'Arcy W. Thompson in 1900 and Dr. Frank Springer in 1901 cited 

 this species as one having a very wide range. 



In 1905 Dr. Wilhelm Minckert mentioned the commonly banded arms of Antedon 

 carinata and remarked upon a specimen showing partial regeneration of a cirrus giving, 

 however, no hint as to its origin. 



In 1905 Prof. F. Jeffrey Bell described Antedon capensis as follows: 



This species appears to be allied to Carpenter's A. basicurva, but to differ from it and A. incisa 

 by the larger number of cirrus-joints. 



The centrodorsal is flat, bare in the centre, with two rows of very stout cirri, as much or more 

 than 25 mm. long. Arms very stout, but so broken that their length cannot often be guessed, some- 

 what flattened from side to side; an almost complete arm is figured; arm joints overlap, and are often 

 provided with a median tooth, so that the arm, when viewed from the side, appears to have a dorsal 

 keel; the pinnules which are stout and stiff, taper rather abruptly. The arms are beautifully spotted 

 with purple. 



Most of this description will apply to a number of specimens, but there are very striking 

 differences among them, some are very stout and strong, others are almost delicate; as the specimens 

 have been in formalin and in spirit, too much importance is not to be ascribed to the absence of 

 pigment, or to the difference to be seen in its distribution on the bodies of different examples. 



He said that this new species appears to be allied to Carpenter's Antedon 

 (= Charitometra) basicurva but to differ from A. (Charitometra) incisa by the larger 

 number of cirrus segments. He recorded specimens from five different stations. 



Minckert in his treatise on regeneration published hi 1905 mentions Carpenter's 

 observations (1888) on a specimen from Mauritius and another from Bahia in which 

 he "found a cirrus which shows signs of having been broken and subsequently repaired, 

 the distal portion of it being much smaller than the base." 



In my first revision of the old genus Antedon published in 1907 I made Comatula 

 carinata Lamarck, 1816, the type of the new genus Tropiometra. In a footnote I gave 

 Bell's Antedon capensis as a synonym of Tropiometra carinata, saying that I had 

 compared specimens identified by Professor Bell with others from Zanzibar and had 

 found them identical. This was written at the Museum of Comparative Zoology. 

 Not long before, Dr. Hubert Lyman Clark had received from Professor Bell some 

 cotypes of Antedon capensis and with his characteristic kindness had permitted me 

 to examine them. Under the genus Tropiometra I listed T. braziliensis (Rathbun) 

 as well as T. carinata (Lamarck). 



In a paper published in January 1908, 1 discussed in detail 17 6-rayed specimens 

 of Tropiometra carinata from Rio de Janeiro that I had found among the 348 speci- 

 mens in the Museum of Comparative Zoology, and figured five of them. I said that 

 Prof. F. Jeffrey Bell had been so kind as to examine for me the 6-rayed "Antedon" 

 in the British Museum recorded by Carpenter in 1888 and subsequently mentioned 

 by Bather and by Bateson and had identified it as T. carinata, but said there was no 

 information regarding its origin. In a paper published on April 11, 1908, I said that in 



