PLATES IN VOL. IIL 



Plate I. Hypnum pyrenaicum. — Dici-anum glaucum. — Polytrichum al- ' 

 pinum. 

 II. Isothecium Philippianum. 



III. Southbya tophacea. 



IV. New species of Sargassum. 



V "l 



Yj' > Anatomy of Eolis. 



VII. Structure of Muscular Fibre. 



VIII. Synalissa vulgaris. — Cystocoleus ebeneus. — Coccochloris Brebis- 



sonli. 

 IX. 1 

 X. J- New species of Sargassum. 



XII. 1 

 XIV f^^^ species of Excavating Sponges, 



xv!j 



XVI. Structure of Vogmarus Islandicus. 



ERRATUM. 



Page 6, 9 lines from top,/or ll.'j to 180, read 115 to 130. 



