532 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



recalls the two from the Red Sea labeled Antedon spec, by Carpenter, which in their 

 much more delicate build are nearer the typical specimens. 



The specimen from the Red Sea (No. 2019) I examined at the Berlin Museum 

 in 1910. It has 30 arms 135 mm. long. The centrodorsal is thick discoidal, with 

 slightly sloping sides and the flat dorsal pole 4 mm. in diameter; the cirrus sockets 

 are arranged in three closely crowded marginal rows. The cirri are 17 to 20 mm. 

 long and composed of 24 or 25 segments, of which the outer are carinate; the longer 

 proximal segments are slightly longer than broad, and the short distal segments are 

 slightly broader than long. 



Hartlaub figured one of the two specimens of Antedon leucomelas Riippel sent 

 him from the Senckenberg Museum. He said that the color was light brown, so that 

 the species name given by Riippel seems scarcely understandable. The color of 

 comatulids, however, often changes very greatly after long preservation in alcohol. 



At the Berlin Museum in 1910 I examined three of the specimens described by 

 Hartlaub. One was small and badly broken, and the other two had 30 arms 110 mm. 

 long. These had been brought from the Red Sea by Hemprich and Ehrenberg. 



The specimen collected by M. Botta in the Red Sea in 1836 is of medium size, and 

 has about 30 arms. 



Of the two specimens from the Red Sea collected by M. Jousseaume, one is of 

 medium size and the other is small. 



Hartlaub mentioned two specimens in the Berlin Museum that had been labeled 

 Antedon spec, by Dr. P. H. Carpenter. They are distinguished by their delicate 

 postradial series and strikingly long lower pinnules, though in their other features they 

 show so very much the character of the present species that he could not separate 

 them from it. 



The specimen from the Red Sea in the British Museum is a fine example of the 

 species. 



The specimen from Muscat has 36 arms and the cirri XLV, 22-25. 



The specimen from Zanzibar is small, but it appears to be of this species. 



The specimen from Dar-es-Salaam consists of fragments only. 



Hartlaub said that in this species the length of the lower pinnules, as well as the 

 extent to which the postradial series are separated from each other, appears to be sub- 

 ject to variation. The same is true of the general habitus, which is sometimes stout, 

 sometimes much slenderer, as in the specimens upon which Muller's description was 

 based (that is, the specimens from the Red Sea collected by Hemprich and Ehrenberg) . 



Localities. Suez; between tide marks; C. Gordon Logan, Esq. [Chadwick, 1908; 

 A. H. Clark, 1911]. 



Suez Bay; Cyril Crossland [Chadwick, 1908; A. H. Clark, 1911]. 



Cambridge Expedition to the Suez Canal, 1924, station Km. 146; stretch of canal 

 from Little Bitter Lake to Suez, at Canal Company's Signal Station; October 31, 1924 

 [Mortensen, 1926; Fox, 1926]. 



Cambridge Expedition to the Suez Canal, 1924; Port Taufiq [Mortensen, 1926; 

 Fox, 1926]. 



Cambridge Expedition to the Suez Canal, 1924; station R. 6; eastern shore of 

 Suez Gulf, 8 kilometers south of the quarantine pier; November 6, 1924 [Mortensen, 

 1926; Fox, 1926]. 



