230 



THE VOYAGE OF H.M.S. CHALLENGER. 



An examination of the table of Littoral species^ shows us a few species sucli as- 



Dorocidaris papillata. 

 Goniocidaris canaliculata. 

 Sphcerechinus granulans. 

 Echinus acutus. 

 Echinus raagellanicus. 

 Echinocyamus 2n(s{llus. 



Spatangus p)urpureus. 

 Maretia alta. 

 Echinocardium australe. 

 Hemiaster cavernosus. 

 Brissop)sis lyrifera. 

 Brissopsis luzonica. 



Fihularia australis. 



which have an extensive bathymetrical range, in some cases even an extraordinary one ; 

 the geographical range of the greater number of these species is at the same time very 

 extended. But out of the great number of the species I have called littoral, in spite of 

 the great bathymetrical extension of some of them, we find that of the two hundred 

 and ninety-seven known species two hundred and one are enumerated as littoral, distri- 

 buted among the foUowinp; families and genera : — 



CiDARiD^ (15 species). 



Cidaris, 3. 

 Dorocidaris, 2. 

 Phyllacantlms 6. 

 Stephanocidaris, 1. 

 Goniocidaris, 3. 



Arbaciad^ (7 species). 

 Arbacia, 7. 



DiADEMATiD^ (ll species). 



Diadema, 2. 

 Ccntrostephanus, 3. 

 Echinothrix, 3. 

 Astrojjyga, 3. 



EcHiNOTHUKiDiE (2 species). 

 Asthenosoma, 2. 



EcHiNOMETRAD^ (32 species). 



Colohocentrotus, 2. 

 Heterocentrotus, 2. 

 Echinometra, 6. 



1 There are, of course, associated as littoral, species 

 beyond the Continental limits ; the exact bathymetrical 

 it could be stated. 



Parasalenia, 1. 

 Stomopneustes, 1. 

 Strongylocentrotus, 14. 

 Sphcerechinus, 3. 

 Pseudoholetia, 2. 

 Echinostrephus, 1. 



Temnopleukid^ (20 species). 



Temnop>leuri(s, 3. 

 Pleur echinus, 1. 

 Microcyphus, 2. 

 Salmacis, 5. 

 Mespilia, 1. 

 Amhlypneustes, 5. 

 Holopneustes, 3. 



Teiplechinid^ (20 species). 



Phymosoma, 1. 

 Echinus, 11. 

 Toxopneustes, 4. 

 Hippono'e, 3. 

 Evechinus, 1. 



which in some geographical districts do not extend upwards 

 range is given in the lists of the geographical districts as far as 



