PLATE X. 



Figs. 1-3. Verongia hivsuta (?), Hyatt. 



Fio-. 1. An entire specimen (the central cavity is opened by means of a longi- 

 tudinal incision) ; natural size. 



Fig. 2. Portion of its skeleton ; natural size. 



Fig. 3. Portion of a skeletal fibre, . . . . . . x 280 



Figs. 4-7. Verongia teniiissima (?), Hyatt. 



Fig. 4. An entire specimen ; natural size. 



Fig. 5. Portion of its skeleton ; natural size. 



Fig. 6. Pavement-epithelium of the outer surface, . . . . x 240 



Fig. 7. Portion of a section through parenchyma, showing the arrangement 

 of the canal system as well as the histological jiroperties of 

 the species, — S, spermospores ; R, " Eeservenahrungs-Material " 

 formations of F. E. Schulze, . . . . . x GOO 



