PLATE XXII. 



PAGE 



Ki;:. 1 . Cosoinium Woetheni, Prout 41 2 



1. View of specimen, natural size. 



1 a. Enlargement of a part of surface, so as to show one of the dimples and 



the pores. 



Fig. 2. COSOINIUM ELEGANS, Pl'OUt 413 



2. Poriferous side, natural size. 



2 </. One of the dimples with the surrounding pores, magnified. 



Fig. 3. Cosoinium plumosum, Prout 414 



3. Specimen showing the poriferous surface, natural size. 



3 a. Opposite side, showing the cup-shaped cavities, natural size. 



3 b. One of the dimples and the pores, magnified. 



Fig. 4. Cosoinium Miohelinia. Prout 414 



4. Specimen showing the poriferous side, natural size. 



4 a. One of the cup-like cavities, enlarged, showing the dimples and the 



surrounding pores. 



Fig. 5. Cosoinium sagenella, Prout 415 



5. Specimen, natural size, showing the cup-shaped cavities and surface 



pores. 

 D a. One. of the surface cavities, enlarged, so as to show the dimples and 

 pores. 



Fig. (5. COSOINIUM TUBERCULATUM, Pl'OUt 415 



6. Specimen showing the dimples and pores, natural size. 



Fig. 7. Cosoinium asteeia, Prout 41 G 



7. Poriferous surface, natural size. 



7 a. One of the star-shaped dimples, and surrounding pores, magnified. 



Fig. 8. Cosoinium esohaeense, Prout 416 



8. Poriferous surface, natural size. 



8 a. One of the dimples, with the pores, magnified. 



Fig. 9. Ctoi.opoea fungia, Prout 419 



!). Specimen showing the under side, natural size. 



'■) a. Surface striae of same. 



9 h. Pores on opposite side, somewhat magnified. 



Fig. 10. Ctolopoea disooidea, Prout. (See also, pi. xxi, fig. 2, 2<r.). . . .420 



10. Under side of a specimen, natural size. 



10 a. Enlarged surface of same, showing the appearance of the bases of the 

 pores, as seen through the epitheca. 



