EXPLANATION OF THE PLATES IN BPJEF. 



PLATE I. 



Fig. 1. Flustra Lineata. a, enlarged, with polypes protruding. 



2. Flustra Foliacea. 



3. Valkeria Cuscuta, enlarged ; a, nat, size ; h, two tentacles ; 



c, tentacles bent inwards ; d, enlarged, showing the gradual 

 aversion of the animal. 



4. Crisia Denticulata, enlarged ; a, nat. size. 



5. Gemellaria Loricata, enlarged ; a, nat. size. 



6. Sertularia Rosea, enlarged ; a, nat. size. 



7. Cellularia Ciliata, enlarged ; a, nat. size ; 6, one of the 



birds' heads ; c, cell and bird's head, much enlarged. 



8. Campanularia Stringa, enlarged: a, nat. size. 



9. Campanularia Volubilis, enlarged. 



10. Serialarla Lendigera. 



11. NoTAMiA BuRSARiA, enlarged; a, natural size; 6, two pairs 



of polype cells, with the tobacco-pipe appendages. 



PLATE II. 



Fig. 1. Cardium Rusticum (Tuberculatum). 



2. Pagurus Bernhardi, in a Periwinkle shell. 



