LIST OF ILLUSTRATIONS. 
Plates 50 and 51.—Mr. S. J. Hickson on the Ciliated Groove (Siphonoglyphe) in the 
Stomodieum of the Alcyonarians. 
Plates 52 to 67. —Dr. E. B. Wilson on the Deveh>pment of Renilla. 
Plates 68 to 70.—Mr. W. Gardiner on the Continuity of the Protoplasm through 
the Walls of Vegetable Cells. 
Plate 71.—Mr. P. H. Carpenter on a new Crinoid from the Southern Sea. 
Plates 72 to 74.—Mr. O. Reynolds on the Motion of Water, and of the Law of 
Resistance in Parallel Channels. 
