326 PROCEEDINGS OF THE ACADE3IY OF [1890. 



in the collection of the Academy, and after comparison of them with 

 examples of Ech'master sjnnoms from New Providence, Bahamas, 

 also in the collection of the Academy, I am unable to find any well 

 marked characters separating them from the latter species. 

 AVest Indies; Brazil to Virginia. 



Echinaster crassispina, Venill. Trans. Conu. Aca<l. Art* and Sci., Vol, 1, ji. 368, 

 pi. iv, fig. 7. 



This species may prove to be a variety of the preceding species. 

 Bahia, Brazil. 



Echinaster Brasiliensis, ^Miiller and Troselicl. System der Astcriden, ji. 22. (Taf. 

 l.flg. 11 ?.) 



AVest Indies ; Florida Channel to Rio Janeiro. 

 Echinaster spinulosus, Verrill. Proc. Eost. Soc. Nat. Hist., XII, p. 3S6. 

 AVest Coast of Florida. 



Echinaster modestus, Perrier. Nouv. Archives Mus. Hist. Nat. t. VI, p. 200. PI. Ill, 

 fig. 7. 

 Below 100 fathoms, AVest Indies. 



Luidia alternata, Say. Jour. Acad. Nat. Sei. Phila. ( 1 ) Vol. V, 1S25. p. 144. 

 Lutken, Vidensk. Meddel., 1859, p. 42. 

 Perrier, Arch. Zool. Exper., 1876, T. V. p. 254. 



Ludwig, Mem. Cour. Acad. Royal, Belg., 1S82, T. XLIV, No. 5, p. 9. 

 Sladen, " Challenger " Report on the Asteroidea, 1889, p. 250. 

 Luidia granulosa, Perrier, Ann. Sei. Nat., (5) t. .xii, p. 301, PI. II, fig. IS. 

 Luidia variegata, Perrier, Arch. Zool. Exper., 1876, t. v. p. 257. 



A single specimen of this species was collected off Progreso at a 

 depth of about 20 feet. The living animal was straw-colored, with 

 black markings forming three or four irregular, transverse bands 

 upon the dorsal surface of the arms : black markings absent from 

 the ventral surface : spines more or less greenish : ends of the ambu- 

 lacral feet orange red. The same coloration is preserved in the alco- 

 holic specimen, with the exception of the loss of the greenish color 

 of the spines, and of the orange color of the ends of the feet. 



The distinctive characters of this species are the three well-marked 

 rows of paxilljB on either side of the arms, and the existence of two 

 or four imperfect rows of spines upon the dorsal surface of the arms, 

 one or two rows on each side. In the specimen collected, there are 

 traces of three rows of spines on either side of the arm, at its base. 



A few three valved pedicellarise exist in our specimen between the 

 adambulacral and the ventral rows of spines. They clo.sely resemble 

 Perrier's figures of those of Luidia granulosa. 



