SPONGES 



45 



Fifi. 40. 



Histological elements, a, collencytes from Thenea mnrimta; h, chondrenchyme, from 

 cortex of CortiriuM mmlelahrum (Uw uiisliiulfd bodies are microscleres) ; c, cystenchynie, from 

 Pitch ifnuttUnia Johniitrtiiil (partly iliagraminatic) ; d, desiiiacyte, from Dntfivinstra Normtmi; c, 

 myocytes in continuity with coUencytes, from Cinachyra harhatu .- /, tlu'socyte, from Thenea 

 viuricata ; ij, clioanocyto, from Sycnn rajihaiius; h-n, scleroblasts ; h and i of rlialidi, from 

 Craniella cranium : j,\>f a, triaene, from .S7WWf« / /.-, of a tetracladine desma, from ThcnncUa 

 winhaei; I, of a si^inasijire, from Vronielht cranivii) ; m, of a draj:ma, from Iii.-yrin(iii ilissimilis; 

 ns, of a sterraster, from (leodia barrdli. (Figs. 6 and tj after Schulze, the rest after bollas.) 



