[DAWSON ] 



FOSSIL SPONGES Trans. 18!i0. Sec IV.— Plate. HI. 



Fi(i. 11. 



lM(i. it. 



Fiii. 12. 



Protosi'onyiii cyathi- 



-Portion of PaUfosnccus IJawsoni. 

 L— Slab with Hiiiali specimen of Hyalosttlia Metissica ivt (a). 

 oritiis at (b) and fragment of Cynihophycun at (c). 



J^'iK- ^y.—Aviinthodivtija hixplda. Fragment of small specimen, partly encrusted witii pyrite. 

 ^Mg. 12.— Debris of Protosponi/ia. (All natural size.) 





127 



i 



