62 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



ter dans le rapport sur les echantillons recueillis par le ' Challenger.' " 

 This, of course, is an error; Antedon australis is the same as A. 

 antarctica, and A. rhomboidea is the same as A. magellanica. 



Subgenus FLOROMETRA A. H. Clark 

 FLOROMETRA MAGELLANICA (Bell) 



Antedon eschrichti var. magellanica 1882. Bell, Proc. Zool. Soc. London, 



1882, p. 651 (1). 

 Antedon rhomboidea 1888. P. H. Carpenter, " Challenger " Report, Comatu- 



las, p. 148 (2, 4). 



i. Swallow Bay, Straits of Magellan; 12 fathoms; mud and rock. — 

 One specimen ; P 3 is like the following pinnules ; P x and P 2 are very 

 long and flagellate with short segments ; the arms are 190 mm. long. 



2. " Challenger " Station No. 308. — One specimen ; this resembles 

 the specimen in the U. S. National Museum from Panama ; the 

 ossicles of the IBr series and the lower brachials have spinous edges 

 and a few scattered spines along the borders ; the lower segments o 

 the proximal pinnules are very strongly carinate. 



3. Near Cape Providence, Straits of Magellan; H. M. S. "Sylvia. 

 — One specimen, closely resembling the type. 



4. Tom Bay, Patagonia. — One young specimen. 

 Remarks. — So far as I am able to see the types of Carpenter's 



Antedon rhomboidea only differ from the type of Bell's Antedon 

 eschrichti var. magellanica in being slightly more spinous proximally. 

 This is merely an indication of immaturity. The two supposed 

 species are undoubtedly identical. 



Genus CYCLOMETRA A. H. Clark 



CYCLOMETRA FLAVESCENS A. H. Clark 



Cyclometra Havescens 191 1. A. H. Clark, Proc. Biol. Soc. Washington, 

 vol. 24, p. 87 (1). 



i. South of Ras Sharwein, Arabia, or northwest of Sokotra (14 

 20' N. lat., 52° jo' E. long.) ; 1200 fathoms; " Plectra!' — One speci- 

 men, described in detail in the reference cited. 



Genus HATHROMETRA A. H. Clark 



HATHROMETRA PROLIXA (Sladen) 



Antedon prolixa 1881. Sladen, in Duncan and Sladen, Memoir on Arctic 

 Echinod., p. 77 (1). — 1888. P. H. Carpenter, "Challenger" Report, 

 Comatulse, pp. 166 (in text), 377 (1). — 1892. Bell, Cat. Brit. Echinod. 

 in Brit. Mus., p. 58 (2, 3). — 1892. Danielssex, Den Norske nordhavs- 

 Expedition, 1876-8, vol. 5, No. 21, pp. 19, 23 (4). — Brit. Mus., MS. (5). 



