LIST OF ILLUSTRATIONS. 
Plates 1 to 44.—Mr. W. K. Parker on the Structure ancl Development of the Skull 
in the Batrachia. 
Plates 45, 46.—Dr. U. Pritchard on the Cochlea of the Ornithorhynchus platypus 
compared with that of ordinary Mammals and of Birds. 
Plates 47 to 54.—Professor W. C. Williamson on the Organization of the-Fossil 
Plants of the Coal-Measures. 
Plates 55 to 58.—Mr. W. Crookes on the Viscosity of Gases at High Exhaustions. 
Plates 59, 60. —Professors A. W. Reinold and A. W. Rucker on the Electrical 
Resistance of Thin Liquid Films, with a revision of Newton’s Table of Colours. 
Plates 61 to 63.— Mr. G. H. Darwin on the Tidal Friction of a Planet attended by 
several Satellites, and on the Evolution of the Solar System. 
Plates 64 to 66.— Professor Owen on some Remains of the Gigantic Land-Lizard 
(Megalania pvisca) from Australia. 
Plate 67.—Mr. J. Norman Lockyer on Spectrum Analysis in Connexion with the 
Spectrum of the Sun. 
Plates 68, 69.—Mr. E. C. Baber on the Minute Structure of the Thyroid Gland. 
Plates 70 to 76.—Mr. J. W. Hulke on the Polacanthus Foxii. 
Plates 77, 78.—Mr. J. N. Langley on the Histology and Physiology of Pepsin¬ 
forming Glands. 
Plates 79-85.—Mr. G. J. Rumanes and. Professor J. C. Ewart on the Locomotor 
System of Echinodermata. 
Plates 86-88. —Captain Abney and Lieutenant-Colonel Festing on the Molecular 
Grouping of Organic Bodie 
