PLATE V. 



FIG. 



1. BRETTIA TUB^FORMIS, p. 28. After a sketch by 

 Mr. R. S. Boswell. 



2-5. CELLULARIA PEACHII, p. 34. 



6. FLUSTRA BARLEEI, p. 122, nat. size. From a drawing 



by Mr. Alder. 



7. 3 zocecia, with avicularia. 



8. - , zooecia, showing the immersed ooecia. 



