PLATE LIT. 



FIG. 



1. PALMICELLARIA SKENEI, p. 379; var. /3 (FOLIACEA), 



about nat. size ; from a beautiful specimen in the 

 possession of Dr. M'Intosh. 



2. - , usual form, nat. size. 



3. , zooecia. 



3 . , zocecium, showing position of the avicu- 



larium. 



4. , form BICORNIS. 



5, 6. PALMICELLARIA LOREA, p. 382 ; nat. size, and zooecia 

 magnified. 



7. CELLEPORA RAMULOSA, p. 401; slightly above nat. size. 



i 

 8. , zooecia. 



9. , a single cell, showing the spur at the 



base of the rostrum. 



