PLATES IN VOL. L 



Plate I. Propagation of the Desmidiese and Diatomeae. 

 IL New British Shells. — New sjiecies of Vaginula. 

 III. Fecundation and Development of CEdogonium. 



IV 1 



' I New Insects from Madeira. 



VI. Structure and Affinities of Myricacese, Platanese, Chloran- 

 thacese, &c. 



VII. Hislopia lacustris. 



VIII. Nidification of the Crustacea. 



IX. Palaeozoic Bivalved Eutomostraca. 



X. Palaeozoic Bivalved Entomostraca. — Trevelyana Ceylonica. 



XI. Structure of Chondi-ostachys. 



XII. Camptouyx Theobaldi. — Tanysiphon rivalis. — Novaculina 

 Gangetica. 



