LIST OF ILLUSTRATIONS. 
Plate 1. — Rev. S. Haughton on the Tides of the Arctic Seas. 
Plate 2. — Dr. J. Hopkinson on the Electrostatic Capacity of Glass. 
Plates 3 to 5. — Mr. C. S. Tomes on the Structure and Development of Vascular 
Dentine. 
Plates 6 to 8. — Messrs. W. De La Rue and H. W. Muller on the Electric Discharge 
with the Chloride of Silver Battery. 
Plates 9 to 14. — Mr. J. N. Lockyer and Dr. Schuster on the Total Solar Eclipse of 
April 6, 1875. 
Plates 15 to 18. — Messrs. W. De La Rue and H. W. Muller on the Electric 
Discharge with the Chloride of Silver Battery. 
Plates 19 to 25. — Professor W. C. Williamson on the Organization of the Fossil 
Plants of the Coal-Measures. 
Plate 26. — Dr. J. P. Joule on a New Determination of the Mechanical Equivalent ot 
Heat. 
Plates 27 to 33. — Mr. W. K. Parker on the Structure and Development of the Skull 
of the Common Snake ( Tropidonotus natrix). 
Plates 34 to 44. — Mr. H. N. Moseley on the Structure of the Stylasteridse, a Family 
of the Hydroid Stony Corals. 
Plates 45 to 47. — Mr. J. F. Bullar on the Development of the Parasitic Isopoda. 
Plates 48 and 49. — Professor W. Turner on the Placentation of the Apes, with a 
Comparison of the Structure of their Placenta with that of the Human Female. 
Plates 50 and 51. — Professor E. A. Schafer on the Nervous System of Aurelia aurita. 
Plates 52 to 54. — Mr. B. T. Lowne on the Modifications of the Simple and Compound 
Eyes of Insects. 
Plates 55 to 57. — Mr. T. W. Bridge on the Osteology of Polyodon folium. 
Plates 58 to 65. — Mr. A. Sanders on the Anatomy of the Central Nervous System in 
Vertebrate Animals. 
Plates 66 to 70. — Dr. T. R. Robinson on the Determination of the Constants of the 
Cup Anemometer by Experiments with a Whirling Machine. 
