Flambe] SPONGES FROM THE ATLANTIC COAST OF CANADA 211 



Fig. (x— Si/con pi'otectuni (piige 206). Twice the natural size. 



Fig. 6a. Triradiate spicule of the tubar skeleton ; x 272. 

 FigvS. (^b, 6c, M. Dermal triradiate spicules ; x 272. 

 Fig. 6e. Quadriradiate spicule ; x 272. 

 Fig. 6/. Oxeote spicule ; x 136. 



Fig. Of/. Arrangement of dermal triradiate spicules at the entrance of one 

 of the radial tubes ; x 272. 



Fig. l.~Grantia Canadensis (Tp-A^e. 208). Twice the natural size. 



Fig. la. Triradiate spicule ; x 272. 



Fig. lb. Quadriradiate spicule ; x 272. 



Fig. 7c. Oxeote spicule ; x 136. 

 Fig. 8. — CranieUa Logani (page 209). Natural size. 



Fig. Sa. Somal oxeote spicule ; x 60. i 



Fig. 8b. Cortical oxeote spicule ; x 136. 



Figs. 8c, 8(1. Cladal ends of protriasnes ; x 136. 



Figs. Se, 8/. Cladal ends of immature protritenes; x 136. 



Fig. Sg. Cladal end of anatritene ; x 136. 



Fig. 8/i. Cladal end of immature anatrisene ; x 136. 



Fig. 8i. Sigmaspires ; x 272. 

 Fig. 0. — Portion of an anchor-like spicule (page 210) ; x 60. 



Figs. 9a, 96. 9c. Cladal ends of anchor-like spicules ; x 136. 



Fig. dd. Slender hexact ; x 60. 



Figs. 9e, 9/. Pentacts ; x 60. 



Fig. 9g. Portion of dictyonal skeleton of a sponge ; x 60. 



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