PLATES IN VOL. XVL 



Plate I. British Cuscutae. 

 II. British Annelides. 



III. British Diato'macese. 



IV. Scolex Acalepharum. — Development of Annelides. — Anatomy of 



Sagitta. 



VI. y Anatomy of Actaeon. 



VII. J 

 VIII. Artamus mentalis. 



IX. Gnathodon strigirostris. 

 X. Spirulina and Coleochaete. 



XI. New Crustacea. 

 XII. Anatomy of some Zoophytes. 



•^jy* JNew Spongiadse. 



XV. British Annelides. 



ERRATA, 

 p. 351, line 26 from top, for Robert Dairs read Robert Davis. 

 — 357, last line, foot note, /or hood read head. 

 In the Meteorological Table for March (May Number), the average temperature observed at 

 Sandwick Manse, Orkney, is stated to be 48-40 instead of 3972. 



