LIST OF ILLUSTRATIONS. 
Plate I. — Major-General Sabine on the Decennial Magnetic Inequality at Hobarton. 
Plates II. III. IV. V. — Mr. H. J. Brooke on the Geometrical Isomorphism of Crystals. 
Plates VI. VII. — Mr. John Lubbock on Two Methods of Keproduction in Daphnia, and 
on the Structure of the Ephippium. 
Plates VIII. IX. — Professor Owen on the Scelidothere. 
Plates X. XI. — Mr. George Eainet on the Structure and Development of the Cysti- 
cercus celluloscB, as found in the Muscles of the Pig. 
Plates XII. XIII. XIV. — The Rev. Thomas P. Kirkman on Autopolar Polyedra. 
Plate XV. — Mr. P. H. Gosse on the Dioecious Character of the Rotifera. 
Plate XVI. — Professor Owen on the Foetal Membranes and Placenta of the Elephant. 
Plates XVII. XVIII. XIX. XX. XXI. XXII.— Professor Bunsen and Dr. H. E. 
Roscoe’s Photo-chemical Researches. — Parts I. II. 
Plate XXIII. — Dr. Marcet on the Immediate Principles of Human Excrements. 
Plates XXIV. XXV. XXVI. — Mr. F. Curret on the Fructification of certain Spheeri- 
aceous Fungi. 
Plate XXVII. — Professor Bunsen and Dr. H. E. Roscoe’s Photo-chemical Researches. 
—Part III. 
Plates XXVIII. XXIX. XXX. — Mr. Airy’s Account of the Construction of the New 
National Standard of Length, and of its principal Copies. 
Plates XXXI. XXXII. XXXIII. — Mr. Hodgkinson’s Experimental Researches on the 
Strength of Pillars of Cast Iron. 
