The Voyage of H M S "Challenger" 



Echini PI JXX' 



■.*\ 



'M~. 



ff^~ ^\ . --*?> -'....1 ' , }. 



"f.^r- ■ .a* ^ , ^-.r 



-^fft''--^':^^ 





V 



^ 



° ^ ^fp:- :. 



"■2^. ! ; 



^^^31^^^' '■-* 





10' J^i 



;<;'^vrt^-^ y?' 



=\ -^ t^f^. 



v'- -r^ 











'«*iS*"' 



,:, a 



URECHINUS IMARESIANUS AAg-. 15 16 BRISSUS DAMESI AAg; 



