short, but I think, sufticienl descriptions and figures of the more prominent features. 

 These species are: 



Cha'todiadema japonicum. 

 Opechiiuis spectabilis. 

 Pleurechinus variegatus. 

 — maculatus. 



Microcyphus elegans. 



anmilatus. 

 Gijmnechinns versicolor. 



— inconspicuus. 



For the more difficult genera analytical tables of the species are given, 

 which, I hope, will prove useful, so that future faunistic reports can be somewhat 

 more reliable than is the case with several of the previous ones. 



Copenhagen, November 1903. 



Th. Mortensen. 



