222 DISCOVERY REPORTS 



Type locality. Not stated. Original specimens from 75 to 150 fathoms off Kerguelen 

 and Heard Islands and between the two. 



Distribution. South of the Antarctic Convergence: Kerguelen, Heard; Antarctic 

 Archipelago; South Orkneys, South Sandwich Islands, South Georgia, Shag Rocks; 

 93-440 m. 



The record of this species from Challenger St. 191, 800 fathoms, Arafura Sea needs 

 confirmation by new material. 



Labidiaster radiosus Liitken 



(Fig. I, 2-2 b) 



Labidiaster radiosus Liitken, Videnskab. Medd. naturh. Foren. i Kjobenhavn, 1871, p. 293. — Studer, 

 1884, pp. 14-25, pis. 2, 3, fig. ^a-y. — Sladen, 1889, p. 595, pi. 108, fig. 2. — Perrier, 1891, p. 72, 

 149-159, pi. 8, figs. 2-11. — Ludwig, 1903, p. 58, pi. 4, fig. 39; 1905, p. 71. — Koehler, 1917, pi. i, 



%• 3-— 1923. P- 6. pl- I. %• 3- 

 Labidiaster crassus Koehler, 1923, p. 7, pl. i, figs, i, 2. 



St. 48. 8-3 miles north, 53° E of William Point Beacon, Port William, East Falkland Island, 

 105-115 m., 3 specimens. 



St. 51. Off Eddystone Rock, East Falkland Island, 1 05-1 15 m., fine sand, 18 specimens. 



St. WS 72. Falkland Islands, 51° 07' S, 57° 34' W, 79 m., sand and shell, 5 specimens. 



St. WS 79. Falkland Islands, 51° 01' 30" S, 64° 59' 30" W, 131-132 m., fine dark sand, 5 speci- 

 mens. 



St. WS 83. 14 miles south, 64° W of George Island, East Falkland Island, 137-129 m., fine green 

 sand and shell, i specimen. 



St. WS 84. 7J miles south, 9° W of Sea Lion Island, East Falkland Island, 75-74 m., coarse sand, 

 shell, stones, 17 specimens. 



St. WS 91. Tierra del Fuego, 52° 53' 45" S, 64° 37' 30" W, 191-205 m., fine dark sand and shell, 

 I specimen. 



St. WS 93. West Falkland Island, 51° 51' S, 61° 30' W, 133-130 m., grey sand, i specimen. 



St. WS 97. Falkland Plateau, 49° 00' 30" S, 61° 58' W, 146-145 m., i specimen. 



St. WS 225. Falkland Islands, 50° 20' S, 62° 30' W, 162-161 m., green sand, shells and pebbles, 

 I specimen. 



St. WS 226. Falkland Islands, 49° 20' S, 62^ 30' W, 144-152 m., i specimen. 



St. WS 249. Falkland Islands, 52° 10' S, 57" 30' W, 166 m., fine brown and green sand, shells, 

 stones, I specimen. 



St. WS 583. Falkland Islands, 53° 39' S, 70° 54^' W, 14-78 m., 1 specimen. 



St. WS 801. South-east of Cape Tres Puntas,' 48° 26!' S, 61° 28' W, 165 m., i specimen. 



St. WS 824. Falkland Islands, 52° 29;^' S, 58° 27J' W, 146-137 m., 3 specimens. 



St. WS 825. Falkland Islands, 50° 50' S, 57° 15^' W, 135-144 m., i specimen. 



This species has been erroneously reported from the Antarctic Archipelago by 

 Koehler, as noted under synonymy of L. annidatiis. Even specimens from as near the 

 Falkland area as Shag Rocks are referable to annulatiis. 



The two species are readily distinguishable by the persistence, in radiosns, of the 

 abactinal arcs of plates to the end of the ray ; by the smaller crossed pedicellariae of the 

 transverse integumentary cushions, relatively few abactinal straight pedicellariae, and 

 by large primary abactinal spines of disk in addition to distinctly smaller secondary ones. 

 Although there are no specimens of radiosus large enough to compare with the fully 



