LIST OF ILLUSTBATIONS. 
Plates 1 to 5. —Professors G. D. Liveing ancl J. Dewar on the Ultra-Violet Spectra 
of the Elements. 
Plates 6 and 7. —Professor T. G. Bonney on a Collection of Bock Specimens from the 
Island of Socotra. 
Plates 8 to 17. —Mr. W. K. Parker on the Skeleton of the Marsipobranch Fishes.— 
Part I. The Myxinoids ( Myxine and Bdellostoma). 
Plates 8, 10, 14, 15, and 18 to 26.—Mr. W. K. Parker on the Skeleton of the 
Marsipobranch Fishes.—Part II. Petromyzon. 
Plates 27 to 34. —Professor W. C. Williamson on the Organization of the Fossil 
Plants of the Coal-Measures. 
Plates 35 and 36. —Messrs. W. De La Bue and H. W. Muller on the Electric 
Discharge with the Chloride of Silver Battery. 
Plates 37 and 38. —Dr. W. B. Carpenter on Orbitolites tenuissima. 
Plates 39 to 41.— Professor Owen on the Affinities of Thylacoleo. 
Plates 42 to 44.— Mr. H. M. Ward on the Morphology and the Development of the 
Perithecium of Meliola, a Genus of Tropical Epiphyllous Fungi. 
Plate 45. — Dr. T. S. Humpidge on the Atomic Weight of Glucinum (Beryllium). 
Plate 46. —Professor Owen on the Pelvic Characters of Thylacoleo carnifex. 
Plate 47. —Professors A. W. Beinold and A. W. Buoker on the Limiting Thickness 
of Liquid Films. 
Plates 48 and 49. —Professor H. N. Martin on the Direct Influence of Gradual 
Variations of Temperature upon the Bate of Beat of the Dog’s Heart. 
Plates 50 and 51.—Mr. S. J. Hickson on the Ciliated Groove (Siphonoglyphe) in the 
Stomodaeum of the Alcyonarians. 
Plates 52 to 67. —Dr. E. B. Wilson on the Development of Benilla. 
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. BeyNolds on the Motion of Water, and of the Law of 
Besistance in Parallel Channels. 
