SHALLOW-WATER STARFISHES 367 



R. gibber Sladen, 1889; Ludwig, 1905, pi. v, figs. 6, 7. This 

 occurred in from 14 to 245 fathoms, in Magellan Strait. 



R. verrucvsus Sladen. This occurred in 55 fathoms, in Magellan 

 Strait. 



PHANEROZONA. 



The family Odontasteridae is better represented in the Fuegian 

 fauna than in most regions, some species occurring commonly even at 

 low tide and in shallow water. Several nominal species have been 

 described, some of which Ludwig (1905) and others reduce to syno- 

 nyms. Ludwig recognizes three shallow-water species ; viz. : 



1. O. grayi (Bell, non Perrier) = Gnathaster grayi Sladen = O. 

 pedicettaris (Perrier). 



2. O. penicillatus (Phil.) -f- O. pilulatus (Sladen, as Gnathaster) 

 -\- O. meridionalis (Smith). Leipoldt, 1895. 



3. Asterodon singularis (Miiller and Troschel) Leipoldt, 1895, pi. 

 xxxi, figs. 7&-c, as Odontaster = A. granulosus Perrier, 1891, pi. xi, 

 figs. 4a, b. 



A. belli (Studer) Perrier is probably not distinct from A. singularis. 



The first species is from a depth of 10 to 97 meters. The second 

 species ranges from 5 to 150 fathoms. Several other antarctic species 

 have been described from deeper water. ( See Sladen ; also Koehler, 



I905-) 



Luidia magellancia Leipoldt, 1895, p. 610, pi. xxxn, figs. na-c. 

 This is remarkable as inhabiting cold waters, for all the other numer- 

 ous species inhabit tropical or temperate seas. The type had the 

 radii 208 m. and 35 m ; ratio, 1 : 6. Its nearest related species are L. 

 bellona Liitken, which ranges from Chile to Mexico, and L. phragma 

 Clark (1910, p. 329, pi. n, fig. i), which was supposed to be from 

 Peru. This may, therefore, be considered as one of the few that were 

 probably of Panamic origin. 



IX. LIST OF PATAGONIAN AND FUEGIAN STARFISHES FOUND 

 IN FROM SO TO 500 FATHOMS, MOSTLY RELATED TO 

 NORTHERN OR ARCTIC SPECIES. 



In the somewhat deep, cold waters on the " continental slopes " (50 

 to 500 fathoms), a considerable number of genera and species have 

 been found that are closely related to those of the North Pacific and 

 North Atlantic and the Arctic Ocean. Many of these have been 

 recorded by Sladen, 1889; Perrier, 1891; Leipoldt, 1895; Ludwig, 

 1905 ; Koehler, 1905, and others. Among them are the following : 



1 Some species from Kerguelen Island, etc., are here included, but some are 

 common to the two regions. 



