PLATES IN VOL. XVII. 
Puate I. Fecundation in Plants. 
II. Delphinus Tursio. 
III. Anatomy of Aramus scolopaceus. 
IV. Hyperoodon Butzkopf. 
The teeth in fig. 1 have been incorrectly drawn ; they should have 
been represented sharp-pointed. 
Vv. 
vi } Development of Chara. 
VII. 
VIII. Anatomy of Trogon melanocephalus. 
IX. Geomalacus maculosus.—British Entomostraca, 
X. Development of the Ova of the Nudibranchiate Mollusea. 
XI. Corynactis viridis. 
