266 THE VOYAGE OF H.M.S. CHALLENGER 



Magellan, the latter extending to the Atlantic side. * Pentagonaster 

 astrologorum, Pentagonaster auratus, and Pentagonaster magnificus, 



off the coast of Australia. 



Eastern Archipelago : Two species between the parallels of 10° N. and 10° S. 

 Pentagonaster inzequalis is supposed to be from New Guinea or 

 Amboina. /'< ntagonaster semilunatus is stated to have been found at 

 Celebes ; it extends into the Pacific, Indian, and Atlantic Oceans. 



Indian and Southern Oceans : Seven species between the parallels of 0° and 

 45° S. 



The following five species are recorded to be from Australia, viz., 

 Pentagonaster grandis, Gray (non Pentagonaster grandis, Perrier). 

 Pentagonaster nobilis, Pentagonaster ruber, Pentagonaster tuber- 

 cularis, and Pentagonaster australis ( = Pentagonaster procyon, Val.). 

 Pentagonaster sem ilunatus, from Zanzibar.and extending to the Atlantic 

 and Pacific. Pentagonaster tubercidatus, from Port Natal. 



The species obtained during the Challenger Expedition are marked in the foregoing list 

 with an asterisk. 



The locality of the following eight species is unknown, and their names have conse- 

 quently not been included in the foregoing lists :— 



Pentagonaster gibhosus, Perrier. 

 Pentagonaster lamarcM, Miiller and Troschel. 

 Pentagonaster luzonicus, Gray. 

 Pentagonaster nimnwillatiis, Miiller and Troschel. 



Pentagonaster minimus, Perrier. 

 Pentagonaster ornatus, Miiller and Troschel. 

 Pentagonaster punetatus, Lamarck. 

 Pentagonaster regularis, Linck. 



The types of the three following species are not to be found, and the names should 

 therefore be discarded in future : — 



Pentagonaster luzonicus, Gray. 

 Pentagonaster punetatus, Lamarck. 



Pentagonaster regularis, Linck. 



Several of the species-names of Gray and of Miiller and Troschel will probably have to 

 be discarded ultimately on account of being either duplicate names or synonyms; but as 

 most of these doubtful forms are represented only by single examples, and are not con- 

 cerned with the present report, I do not consider it desirable to interfere with them at 

 present. 



/3. Bathymetrical range: 20 fathoms to 1500 or 1930 fathoms. 



The depth of a large number of the species is not recorded, but the 

 majority of the older ones are probably from the Littoral zone. Of the 

 forms whose depth is known, Pentagonaster placenta and Pentagonaster 

 parvus are confined to the Littoral zone; Pentagonaster grenadensis, Penta- 

 gonaster arcuatus, and Pentagonaster japonicus to the Continental zone. 



