40 ROYAL SOCIETY OF CANADA 
Pram NI 
Fig. 5.—Leucosolenia cancellata (page 27). Twice the natural size. 
Fig. 5a. Vertical section through the specimen figured ; X 6. 
Fig. 5b. Part of the same section ; X 42. 
Figs. 5c, 5d. Gastral quadriradiate spicules; X 272. 
Fig. 5e. Triradiate spicule ; X 272. 
Fig. 6.—Sycon Eglintonensis (page 29). Twice the natural size. 
Fig. 6a. Part of a horizontal section ; X 60. 
Fig. 6b. Gastral quadriradiate spicule ; X 272. 
Fig. 6c. Gastral triradiate spicule ; X 272. 
Fig. 6d. Tubar triradiate spicule ; X 272. 
Fig. 6e. Large oxeote spicule ; X 136. 

