PLATES IN VOL. XVI. 
Puate I. British Cuscute. 
II. British Annelides. 
III. British Diatomacez. 
IV. Scolex Acalepharum.—Development of Annelides.—Anatomy of 
Sagitta. 
V. 
vr} Anatomy of Actzon. 
Vil. 
VIII. Artamus mentalis. 
IX. Gnathodon strigirostris. 
X. Spirulina and Coleochete. 
XI. New Crustacea, 
XII. Anatomy of some Zoophytes. 
ae } New Spongiade. 
XV. British Annelides. 
ERRATA. 
P. 351, line 26 from top, for Robert Dairs ead Robert Davis. 
— 357, last line, foot note, for hood vead head. 
In the Meteorological Table for March (May Number), the average temperature observed at 
Sandwick Manse, Orkney, is stated to be 49°40 instead of 38°72. 
