REPORT ON THE ASTEROIDEA. 239 
Genus Bathybiaster, Danielssen and Koren. 
Bathybiaster, Danielssen and Koren, Nyt Mag. f. Naturvidensk., 1883, Bd. xxvii. 4. Hefte, p, 285 ; Den Norske 
Nordhavs-Expedition, 1876-78, Zoologi, xi. Asteroidea, 1884, p. 94. 
This genus was established by Danielssen and Koren for a North Atlantic Asterid 
which had previously’ been described by them under the name of Astropecten pallidus. 
The structure and character of the genus and species are fully discussed and admirably 
illustrated in their monograph of the Asteroidea collected by the Norwegian North Atlantic 
Expedition. 
Chorology of the Genus Bathybiaster. 
a, Geographical distribution :— 
ATLANTIC: Two species between the parallels of 60° and 80° N. 
Bathybiaster pallidus off the Norwegian coast and Spitzbergen. 
Bathybiaster vexillifer in the Faerée Channel. 
Pactric: One species between the parallels of 45° and 55° 8. 
Bathybiaster loripes off the western coast of South America, near 
the entrance to the Strait of Magellan. 
SourHerN Ocean: One species between the parallels of 45° and 55° S. 
Bathybiaster loripes, var. obesa, off Kerguelen and Heard Island. 
6. Bathymetrical range: 75 to 1215 fathoms. 
Greatest range of one species: Bathybiaster pallidus, 412 to 1215 fathoms. 
y. Nature of the Sea-bottom: Bathybiaster loripes is found on Blue mud, and Bathy- 
biaster loripes, var. obesa, on Voleanic mud. Bathybiaster pallidus is found 
on Clay, and in its greatest depths on Biloculina clay. 
Chorological Synopsis of the Species. 
Ocean. Range in Fathoms. Nature of the Sea-bottom. 
Bathybiaster loripes , 5 . | Pacific. 245 Blue mud. 
Bathybiaster loripes, var. obesa. | Southern Ocean. 75 to 120 Volcanic mud. 
Bathybiaster pallidus, . | Atlantic. 412 to 1215 Clay. 
Bathybiaster veaillifer . . | Atlantic. 35 |S cece: 
1 Nyt Mag. f. Naturvidensk., 1877, Bd. xxiii. 3die Hefte, p. 62, tab. i. figs. 1-7. 
