LIST OF ILLUSTRATIONS. 
Plates 1 to 7. — Professor W. C. Williamson on the Organization of the Fossil Plants 
of the Coal-measures. 
Plates 8 & 9. — Mr. H. N. Moseley on the Structure and Relations of certain Corals. 
Plates 10 to 15. — Dr. R. von Willemoes-Suhm on the Development of Cirripedia. 
Plates 16 to 18. — Mr. F. M. Balfour on the Development of the Spinal Nerves in 
Elasmobranch Fishes. 
Plates 19 to 31. — Professor Owen on the Fossil Mammals of Australia. 
Plate 31*. — Mr. Charles S. Tomes on the Development of the Teeth of Fishes. 
Plates 32 & 33. — Mr. G. J. Romanes on the Locomotor System of Medusae. 
Plate 34. — Professor Osborne Reynolds on the Refraction of Sound by the Atmosphere. 
Plates 35 & 36. — Mr. W. Crookes on Repulsion resulting from Radiation. 
Plate 37. — Mr. Charles S. Tomes on the Development and Succession of the Poison- 
fangs of Snakes. 
Plate 38. — Mr. J. A. Broun on the Variations of the Horizontal Force of the Earth’s 
Magnetism. 
Plates 39 to 43. — Dr. Herbert Watney on the Minute Anatomy of the Alimentary 
Canal. 
Plate 44. — Dr. J. Hopkinson on the Residual Charge of the Leyden Jar. 
Plates 45 & 46. — Mr. J. Priestley on the Physiological Action of Vanadium. 
Plates 47 & 48. — Mr. E. C. Baber on the Minute Anatomy of the Thyroid Gland of 
the Dog. 
Plates 49 to 51. — Professor W. Turner on the Placentation of the Lemurs. 
Plate 52. — Dr. Viktor von Lang on the Friction between Water and Air. 
Plate 53. — No Plate. 
Plates 54 to 6 2. —Mr. W. K. Parker on the Structure and Development of the Skull 
in the Batrachia. 
Plates 63 to 65. — Dr. C. W. Siemens on determining the Depth of the Sea without the 
use of the Sounding-line. 
