272 



THE VOYAGE OF H.M.S. CHALLENGER. 



The list of species marked here as Pacific includes not only the strictly littoral Pacific 

 species, but also the Indo-Pacific species, and sucli Indo- African species as encroach to 

 the eastward upon the southern Iwundary of the Chinese and Japanese districts, the west- 

 ward boundary of the Pacific, and the northern limits of the Australian realm. 



Of the species collected by the Challenger there have only been found among the 

 littoral species Rhinohrissushemiasteroides, Schizaster japonicus and Moiropsis daudicans 

 which were not previously known. ■ Of these Schizaster japonicus is probably a Japanese 

 and Chinese species, while Moiropsis daudicans, and perhaps Schizaster japonicus may 

 be East Indian species which find their south-eastern limits at the western edge of the 

 Pacific district. 



The range of Astropyga pulvinata, Brissopsis luzonica, Strongylocentrotus eurytho- 

 grammus (an Australian species), of Ccelophurus maillardi (an East Indian species), of 

 Pleurediinus hothyryoides, Pseudoholetia Indiana, Salmacis dussumieri, S. glohator 

 (Australian), Salmacis rarispina (Indian), Evechinus chloroticus (a New Zealand 

 species), Laganum putnami, Maretia alta, Temnopleurus hardwicki, Temnopleurus 

 reynaudi (Japan and China species), Lovenia elongata (Sandwich Islands), and Metalia, 

 maculosa have been greatly extended, while Echinus acutus is another eminently 

 Atlantic species which has found its way far into the Pacific to the Kermadec Islands, 

 and Dorocidaris papillata and Echinus elegans to the Philippine Islands. 



As probably representative continental species of the Pacific we must class Dorocidaris 

 hracteata, Asthenosoma gracile, A. pellucidum, A. grubii,, Catop>ygus recens, and 

 Linopneustes murrayi ; as probably continental representatives of the East Indian 

 fauna, Cottaldia forhesiana, Podocidaris prionigera, and Micropyga tuberculata; of 



