REPORT ON THE ASTEROIDEA. 



471 



Southern Ocean : Three species between the parallels of 40* and 60* S. 



*Pteraster affinis, off Kerguelen. * Pteraster rugatus, from 

 between Kerguelen and Heard Islands. *Pteraster semireticulatus, 

 off Marion Island. 



Pacific : Two species between the parallels of 70" (?) N. and 60° S. 



* Pteraster stellifer, off the western coast of South America. 

 Pteraster aporus, from Bering Sea. 

 /3. Bathymetrical range: 10 to 2021 fathoms. 



Greatest range of one species: Pteraster pulvillus, 50 to 2021 fathoms. 

 Excepting Pteraster militaris and Pteraster sordidus, none of the other 

 species extend into the Abyssal zone. Pteraster caribbaeus and Pteraster 

 stellifer occur in the Continental zone. 



y. Nature of the Sea-bottom : Mud, sandy clay, or gravel. 



Pteraster affinis and Pteraster caribbseus on mud. Pteraster militaris on 

 sandy clay or shelly ground. Pteraster rugatus on coarse gravel. Pteraster 

 stellifer on Blue mud. 



The species collected by the Challenger are indicated in the foregoing list by an 

 asterisk. 



Chorological Synopsis of the Species. 



1. Pteraster militaris, Mutter and Troschel. 



Asterias militaris, O. F. Miiller, 1776, Zool. Dan. Prodr., p. 234, No. 2828. 



Asteriscus militaris, Miiller and Troschel, 1842, System der Asteriden, p. 44. 



Pteraster militaris, Miiller and Troschel, 1842, System der Asteriden, p. 128, tab. vi. fig. 1. 



Locality.— Station 49. South of Halifax, Nova Scotia. May 20, 1873. Lat. 

 43° 3' 0" N., long. 63° 39' 0" W. Depth 85 fathoms. Gravel, stones. Bottom tempera- 

 ture 35 o- Falir. ; surface temperature 40°"5 Fabr. 



