ASTEROIDEA. 



193 



A. rubens, ditto to 110 fms., A. muelleri, ditto, 53 to 433 fms., A. murrayi, 

 W. coast Scotland and Ireland. 



Fam. 10. Brisingidae. Arms long, marked off from the disc (Fig. 139). 

 Marginals absent or vestigial. Abactinal skeleton absent or present only 

 on the ovarian regions. Tube-feet biserial. Genital organs opening on 

 the sides of the arms. Somewhat ophiurid-like in appearance. For the 

 most part in deep water. 



FIG. 139. Odinia elegans E. Per., abactinal view (after E. Perrier). 



Hymenodiscus Perr. ; Gymnobrisinga Studer ; Brisinga Asbjornsen ; 

 Odinia Perr. ; Freyella Perr. ; Colpaster Slad. ; Brisingaster de Loriol ; 

 Labidiaster Liitken. British species : Brisinga endecacnemos and coronata, 

 E. N. Atl., 100 to 1,300 fms. 



The starfishes of the abyssal regions of the ocean belong to the families 

 Brisingidae. Pedicellastridae, Zoroaster idae, Stichasteridae, Pterasteridae, 

 Pentagonasteridae, Archasteridae, Porcellanasteridae. But these are not 

 exclusively abyssal, having littoral representatives in various parts of the 

 world. 



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