R. Rathbun — List of the, Brazilian jEchinoderms. 
157 
successive syzygia. In the characters of the cirri and the centro- 
dorsal piece there are no appreciable differences. 
The specimens from Bahia and Pernambuco, on the contrary, 
differ mostly with regard to the centro-dorsal piece and the cirri. 
The former is usually proportionally broader and flatter, but is 
extremely variable. The cirri are, as a rule, proportionally longer 
and fewer in number; they are placed in about two irregular rows, 
or in one crowded row, and range in number from about fifteen to 
thirty, on medium-sized specimens. They are composed of from 
nineteen to twenty-two joints each. The total spread of the largest 
perfect specimen observed was a little over twenty-five centimeters. 
The color varies from a light yellowish brown to a deep violet, with 
many intermediate shades, specimens being usually banded with 
lighter and darker coloriugs, and seldom of uniform tint. 
The study of a large series of specimens would probably serve to 
unite the Brazilian with the East African species beyond all doubt. 
Antedon meridionalis (A. Ag.) Terrill. 
Proc. Bost. Soc. Nat. Hist., vol. x p. 339, 1866 ; Pourtales. Bull. Mus. Comp. Zool., 
i, No. 11, p. 355, 1869 ; Ibid., v. No. 9, p. 214, 1878. 
Charleston, S. Carolina, to Cape Frio, Brazil (Pourtales, Mus. 
Comp. Zool.) 
Antedon Diibenii Bolsche. 
Archiv. fur Naturgeschichte, 1866, p. 92. 
Rio de Janeiro (Bolsche). 
Antedon sp. 
A small species of Antedon, having between ten and twenty arms, 
was collected by Mr. Branner, in great abundance, at some locality 
not definitely recorded, either on the coast of Pernambuco, or of 
Parahyba do Norte. I have not been able to identify it with any 
described species that has come under my notice, although it may 
not be new. 
It is rather a delicate species, with slender arms and cirri, the 
former at times presenting only one division of the second order, 
resulting in the formation of eleven arms. There may, however, be 
any number of arms, up to at least twenty. It has a total spread of 
only about. 9 cm , the centro-dorsal piece, measuring 2 n,m in diameter, 
being fiat and destitute of cirri on top, but sometimes still preserving 
