172 



COLLECTIOirS PBOM UELAl^EBIA. 



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

 the tropical Une, 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). 



Q} O ^ 



Hi 





1. 



2. 



a 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 



17. 

 18. 

 19. 

 20. 

 21. 

 22. 

 23. 

 24 

 25. 

 26. 

 27. 

 28. 



CSdaris metularia 



Phyllacanthus annulifera . . 



baculosa 



Diadema Betosum 



Astropyga radiata 



Salmacis alexandri 



bicolor , 



sulcata 



Temnopleunia toreumaticus 



granulosus .' 



bothryoides 



Ecbinus angulosus 



darnleyensis 



Toxopneustes pileolus 



Tripneustes angulosus 



Strongylooentrotua erythro- 



grammus 



Echinometra lucunter 



Kbularia Tolva 



Olypeaster humilis 



scntiformis 



Laganum depressum 



deoagonale 



Echinoneus cyclostomuB 



Maretia planulata 



Lovenia elongata 



Breynia aiistralaBisB 



Bohinocardium australe , 



Brissus uuicolor 



Metalia etemalis 



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