REPORT ON THE ASTEROIDEA. 359 
Chorology of the Genus Porania. 
a. Geographical distribution :— 
Attantic: Three species,—two between the parallels of 35° and 70° N., and one 
between the parallels of 50° and 60° S. 
Porana pulvillus, off the coasts of Scandinavia and Britain. 
Porana grandis, off the coast of the United States of North America. 
Porania antarctica, from South Georgia (fide Studer), and extending 
into the Southern Ocean. 
SourHERN OcEaNn: Three species between the parallels of 40° and 60° 8. 
Porania glaber and Porania antarctica, from Kerguelen, the 
latter also off Marion Island, Prince Edward Island, and the Crozet 
Islands. Porania spiculata, off Heard Island, and extending into 
the Eastern Archipelago. 
Eastern ArcuipeLaco: One species between the parallels of 0° and 10° 8. 
Porania spiculata, off the Arrou Islands, and extending into the 
Southern Ocean to Heard Island. 
Paciric: One species between the parallels of 40° and 60° 8. 
Porana magellanica, off the coast of Patagonia, and in the Strait 
of Magellan. 
8. Bathymetrical range: 15 to 1600 fathoms. 
Greatest range of one species: Porania antarctica, 50 to 1600 fathoms. 
y. Nature of the Sea-bottom: Porania spiculata is found on Gravel, Volcanic mud 
and Green mud; Porania magellanica on Green sand; and Porania antarctica 
on Diatom ooze in 1600 fathoms. 
Chorological Synopsis of the Species. 
Ocean. Range in Fathoms. Nature of the Sea-bottom. 
Porania antarctica . ; Southern and Atlantic. 50 to 1600 Diatom ooze (1600 fathoms). 
Porania glaber . : : Southern. 30 to 127 ar abe 
Porania grandis . $ Atlantic. 66 to 373 oes 
Porania magellanica F Pacific. 45 Green sand. 
Porania pulvillus . : Atlantic. 15 to 106 ce a 
a : Southern Ocean and Coarse gravel, Volcanic mud and 
| Porania spiculata ° { Eastern Archipelago. \ dowreno { Green mud (800 fathoms). 
