172 



COLLECTIONS FKOM MELANESIA. 



It will be seen, then, that of the Echinicls 19 were found south of 

 the tropical line, and 11, or 57*5 per cent., were not found either 

 by the 'Alert' or ' Australian Museum' collectors within the tropics. 

 Of the Ophiurids 9 were found south of the line, and only one also 

 within it, so that of this class 88*8 per cent, were found only to the 

 south of the tropics. 



"When we turn to the lists of the ' Alert ' collections in the ' Aus- 

 tralian ' seas and in the western part of the Indian Ocean, we find a 

 very different story. 



Echinids. — Of the 28 species collected within the tropical seas of 

 Australia, four only, or 14-2 per cent., were found also at Port 

 Jackson, while no less than 23, or 72 per cent., were found also in 

 the tropical parts of the western Indian Ocean. 



Table III. — List of Echinoidea collected by the ' Alert ' (to which 

 is added a statement of such as are found also north of the 

 equator, but within the tropics). 



1. 

 2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 



17. 

 18. 

 1'.). 

 20. 

 21. 

 22. 

 23. 

 24. 

 25. 

 26. 

 27. 

 28. 

 29. 



Cidaris nietularia 



Phyllacanthus amiulifera 



baculosa 



Diadema setosum 



Astropyga radiata 



Salmacis alexandri 



bicolor 



sulcata 



Temncpleurus toreumaticus 



granulosus 



bothryoides 



Echinus angulosus 



danileyensis. 



Toxopneustes pileolus 



Tripneustes angulosus , 



Strongylocentrotus erythro- 



grammus 



Echinometra lucunter 



Fibularia vol va 



Clypeaster huinilis 



scutifbrmis 



Laganum depressum 



decagonale 



EcliinoneiiB cyelostonius 



Maretia planulata 



Lovenia elemgata 



Breynia australasia? 



Echinocardium australe . 



Brissus unicolor 



Met alia stcrnalis , 



S -u o 



Jus 



£ S a 



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