326 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Prof. Ludwig von Graff in°|l884 recorded Myzostomum gigas from specimens of 

 Anfedon carinata that had been collected by the Challenger at Bahia. i'S 



In the Alert report published in 1844 Professor Bell mentioned Antedon carinata 

 as a species with an exceedingly wide range comparable to that of Adinometra (— Co- 

 manthus) parvicirra. 



In the Challenger report upon the stalked crinoids published in 1884 Carpenter 

 said that Antedon carinata is a widely distributed species occurring both on the Atlantic 

 and on the Pacific coasts of South America, at Java, Mauritius, the Seychelles, and 

 elsewhere. He remarked that the Challenger had found it to be very plentiful off the 

 coast of Bahia, and gave notes on the anatomy based upon specimens from that locahty. 

 He described the labial plexus in detail and compared it with that of Antedon bifida. 

 He said that he had not only found a distinct genital tube within some of the vessels 

 forming the plexus beneath the disk ambulacra, but he had also met with detached 

 portions of ovaries containing more or less fully developed ova in various parts of the 

 body cavitj"-, as for instance in the spaces of the connective tissue network forming the 

 lip, in the intervisceral portion of the body cavity between the two parts of the coiled 

 gut, and in the subtentacular canals between the genital plexus and the water vessels. 

 He gave a figure of a vertical transverse section of the disk in the anal interradius 

 showing the connection between the genital vessels and labial plexus. 



Prof. Edmond Perrier in liis memoir on the anatomy of Antedon rosacea pubUshed 

 in 1886 quoted extensively from Carpenter's obsei'vations on the anatomy of Antedon 

 carinata. 



In a paper on the supposed presence of symbiotic algae m. Antedon rosacea published 

 in 1887 Carpenter said that sacculi are very thick at the sides of the pinnule ambulacra 

 in Antedon dubeni (=the young of carinata) and A. carinata, of which latter species 

 over 100 individuals were obtained by the Challenger at Bahia. 



In the Challenger report upon the comatulids published in 1888 Carpenter in- 

 cluded all the forms in the genus Tropiometra known to him under Antedon carinata. 

 His description of Antedon carinata was based at least chiefly, and probably wholly, 

 upon specimens that had been collected by the Challenger at Bahia, Brazil, in 7-20 

 fathoms. His notes on the structure and anatomy were based entirely upon Brazilian 

 specimens, but he dissected the calyx of a single specimen from Zanzibar. The 

 localities he gave for Antedon carinata were: Off St. Lucia (278 fathoms); Venezuela; 

 Pernambuco; the Abrolhos Islands; Rio Janeiro; Chile; Java (?); Ceylon; the Seychel- 

 les; Muscat; Aden; Red Sea; Zanzibar; Mauritius; Madagascar; St. Helena. The 

 forms occurring at these localities are now determined as follows: Java (?) — clarki; 

 the Seychelles, Zanzibar, Mauritius, Madagascar, St. Lucia, Venezuela, Pernambuco, 

 Abrolhos Islands, Rio de Janerio, Chile (in reaUty Rio de Janeiro; see p. 322), St. 

 Helena — carinata; Ceylon — indica; Muscat, Aden, Red Sea — audouini. In the dis- 

 cussion of the species he mentioned a specimen from Norfolk Island in the Vienna 

 Museum (see p. 287). 



Carpenter remarked that this species has a wide distribution in the littoral zone 

 of the tropical and the southern subtropical seas; and it is not improbable, therefore, 

 that it is identical with the Alecto carinata of Leach, who defined his type very briefly 

 from a specimen without locality in the British Museum. But the originals of Leach's 

 species are not now to be found in the National Collection, although Prof. F. J. Bell 



