1-22 



THE VOYAGE OF H.M.S. CHALLENGER. 



The following list will serve as a convenient means of reference and may appropriately 



find a place here : — 



Now referred to the Genus indicated in the 

 following terms: — 



Plutonastcr (?) agassizii, Verrill, sp. 



Species erroneously referred to the Genus 

 Arehaster. 



Archastcr agassi~ii, Verrill .... 

 Arehaster americanus, Verrill .... 

 Arehaster andromeda, (Miiller and Troschel, sp.), Lutken 

 Arehaster arcticus, (Sars, sp.), Perrier 

 Arehaster bairdii, Verrill .... 

 Arehaster bifrons, Wyville Thomson 

 Archastcr christi, (Dliben and Koren, sp.), Perrier 

 Arehaster coronatus, Perrier .... 

 Arehaster echiuulatus, Perrier. 

 Arehaster efflorescens, Perrier .... 

 Arehaster excavatus, Wyville Thomson . 

 Archastcr flora:, Verrill ..... 

 Arehaster formosus, Verrill .... 

 Arehaster grandis, Verrill .... 

 Archastcr hesperus, Miiller and Troschel . 

 Arehaster insignis, Perrier .... 

 Archastcr luci/cr, Valenciennes, M.S., in Perrier 

 A rc/t nster magnificus, Bell .... 

 Arehaster mirabilis, Perrier .... 

 Arehaster parelii, (Diiben and Koren, sp.), Sars 

 Arehaster pulcher, Perrier .... 

 Arehaster robustus, Verrill .... 

 Arehaster sepilus, Verrill .... 

 Arehaster simplex, Perrier .... 

 Arehaster subinermis, (Philippi, sp.), Perrier . 

 Arehaster tenuispinus, (Diiben and Koren, sp.), Sars 

 Archastcr vexiUifcr, Wyville Thomson . 



Psilaster andromeda, Miiller and Troschel, sp. 

 Leptoptychaster arcticus, Sars, sp. 



Plutonaster bifrons, Wyville Thomson, sp. 

 Psilaster andromeda, Miiller and Troschel, sp. 

 Pont aster coronatus, Perrier, sp. 

 Pontaster ecliinulatus, Perrier, sp. 



Leptoptychaster kerguelenensis, Smith. 

 Bathybiaster (?) or Psilaster (?) 



Dytaster (?) grandis, Verrill, sp. 

 Craspidaster hespei-us, Miiller and Troschel, sp. 



Dorigona longimana, Mobius, sp. 

 Moiraster magnificus, Bell sp. 

 Pontaster mirabilis, Perrier, sp. 

 Tethy aster parelii, Diiben and Koren, sp. 

 Pontaster (?) pulcher, Perrier, sp. 



Pararchastcr simplex, Perrier, sp. 

 Tethyaster subinermis, Philippi, sp. 

 Pontaster tenuispinus, Diiben and Koren, sp. 

 Bathybiaster (?) vexillifer, Wyville Thomson, sp. 



I have considered it best to withhold any expression of opinion on the generic affinities 

 of some of these forms, as I have not had an opportunity of studying specimens, and I feel 

 unable to form a correct judgment from the descriptions alone. In two or three cases 

 where the description seemed to warrant a surmise I have hazarded a determination, and 

 have placed a (?) after the genus. 



CJiorology of the Genus Arehaster. 

 a. Geographical distribution : — 



Indian and S. Pacific Oceans : Two species between the parallels of 20° N. and 

 40° S. 



Arehaster angulatus has its metropolis at Mauritius, and extends 

 to Australia. There is a specimen recorded from Java in the Berlin 

 Museum, named and mentioned by Miiller and Troschel, 1 but the 

 1 System der Asteriden, p. 66. 



