REPORT ON THE ASTEROIDEA. 



595 



and extending into the Southern Ocean in the neighbourhood of 

 Kerguelen and Heard Islands. 



Pacific : One species between the parallels of 45° and 55° S. 



Labidiaster radiosus, from the Trinidad Channel, west coast of 

 Patagonia, and extending through the Strait of Magellan to the east 

 coast of Patagonia and Rio de la Plata {fide Kinberg). 



yS. Bathymetrical range: 30 to 800 fathoms. 



Greatest range of one species: Labidiastcr annulatus, 75 to 800 fathoms. 



y. Nature of the Sea-bottom : Labidiaster radiosus on sand ; Labidiastcr annulatus 

 on Volcanic mud, Green mud, and coarse gravel. 



Cliorological Synopsis of the Species. 



1. Labidiaster radiosus (Loven), Liitken (PL CVIII. fig. 2). 



Labidiaster radiosus (Loven, M.S.), Liitken, 1871, Videnskab. Medd. naturh. Eoren. i Kj0benhavn, 

 p. 293. 



Locality. — Station 313. Near the Atlantic entrance to the Strait of Magellan. 

 January 20, 1876. Lat. 52° 20' 0" S., long. 67° 39' 0" W. Depth 55 fathoms. Sand. 

 Bottom temperature 47°'S Fahr. ; surface temperature 48° '2 Fahr. 



Remarks. — In addition to the excellent description given by Liitken, this species has 

 recently been exhaustively described by Studer, 1 who also made a careful examination of 

 its anatomical structure, and illustrated a number of the more important details. I have 

 therefore limited myself to a single figure of Labidiaster radiosus, which I have given for 

 the purpose of comparison with the new species. 



2. Labidiaster annulatus, n. sp. (PI. CVIII. fig. 1). 



Rays forty to forty-five. E = 165 to 190 mm. ; r = 33 mm. R> 5 r. Breadth of a 

 ray at about 20 mm. from the disk, 6 to 7 mm. 



Rays elongate, delicate, and cylindrical ; constricted at the base, where they are closely 

 crushed together, then gradually swelling slightly, the ray being broadest at about the 

 1 Anhaiuj z. d. Abhandl. d. k. preuss. Alcad. d. Wiss. Berlin, vom Jahre 1S84, p. 14, Taf. ii., iii. 



