444 MR. W. p. SLADEK ON THE ASTEROIDEA 



a representative form of the N.- Atlantic A. irreffularis type ; and 

 Grihrella densispina I am disposed to consider an indejDcndent 

 development from C. sanguinolenta of the N. Atlantic. Of the 

 remaining Starfish, Aster acantliion rubens is the widely spread 

 Atlantic and circumpolar Asteroid ; Astropecten japoniciis is con- 

 fined to Japanese waters ; and Astr. polyacantlius has a very exten- 

 sive distribution, extending from the lied Sea on the west to the 

 Piji Islands on the east, and reaching northward to Japan — the 

 most important feature which is thus rendered prominent being 

 the presence of northern or representative northern species of 

 Starfish in the Korean seas. 



Turning now to the Echinoidea, it will be found that, of the ten 

 which have been enumerated above, five are additions to the 

 Japanese fauna, viz. Temnopleurus Iteynaudi, T. toreumaticus, Sal- 

 macis sulcata, Ecliinolampas oviformis, and Schizasier ventricosus. 

 Of these, Temnopleurus Reynaudi has hitherto been ranked as a 

 more southern form, and having an extension westward as far as 

 Ceylon ; and similarly T. toreumaticus, which has a still greater 

 westerly stretch to the Persian Gulf. Salmacis sulcata is likewise 

 a more southern species, and with a distribution westward as 

 far as the Eed Sea ; jEchinolampas oviformis is quite a western 

 form in relation to Japan ; and ScMsasfer ventricosus occupies a 

 southern area which ranges eastward to the Fiji Islands. Of the 

 remaining five, which are known Japanese forms, two have a very 

 wide distribution, viz. Echinometra lucunter and EcTiinanthus tes- 

 tudinarius, the former extending from the Red Sea to Australia 

 and thence eastward to the Society Islands, and the latter occupy- 

 ing nearly the same area, but with a still greater easterly exten- 

 sion, reaching to California ; Echinocardium australe extends south- 

 ward to New Zealand and westward to South Africa, — none of 

 the Echinoids above mentioned having a more northerly extension 

 than some portion of the Japan islands. Strongylocentrotus inter- 

 medius reaches from Seghalion to Australia ; and Temnopleurus 

 HardwicJcii is the only one whose limits extend no further south- 

 wards than Japan, whilst it reaches a latitude as far north as 

 Unalaska. 



Erom this conspectus it will be seen that all the Echinoidea, 

 with the exception of a single instance, are those occupying a 

 habitat which has a more southern and, in general, also a more 

 westerly extension than the locality under notice. 



It is especially noteworthy in this collection of specimens from 



