PLATE XVI. 



FIG 1 .lin/ina:i<t MH: Kirkp., nut. size, p. H. 



FIG. 2. S,vi,ion of same through a poral tuln-, cortex un.l choanosome , 



FIG! ;t. Ktxl of n lanjrr poral tube, showing poral sirvc ( x KM. 



FIG. 4. Style (raw) (x I 1 )')). 



FIG r> stnm^yle ( x 1 00) ; 5a, fmthCT enlarged. 



Pl(1 c, Stylocordyla /HWWI/W Loven var. ff< var. ., nat. size, p. 



FII;' 7 Krtosoma I micro-styles (X 100); 7a ( X :.OdV 



FIG. H. Smaller ox.-;, of thu head of the sponge ( 



FIG 0. Hrteroxea (x 100). 



FIG in Lsinrc oxca of stem, with central BwclliiiK ( X 



FIG,;. . ., . iSftLta >^ R. * i( - - *" n - vat " n;a - Bize ' p - 



FIG 1-. Cortical tyle ( X 100). 



FIG. l:i. l>itto (X 100 1. 



FIG. H. Tyle from radiating skeletjfi fibre (X 



