CONTENTS. 



TRANSACTIONS OF TEE SOCIETY. 



PAGH 



I —On the Structure and Affinities of the Genus Porosphaera, Steinmann. 



By George J. Hinde, Ph.D. F.R.S. (Plates' I. and II.) 1 



II.— Microscopic Resolution : Note on a point in Lord Rayleigh's Paper of 



1896. By Professor J. D. Everett, F.R.S. 26 



III. — The Mouth-parts of the Nemocera,and their Relation to the other Families 



inDiptera. By W. Wesche, F.R.M.S. (Plates II1.-VIII.) .. .. 2S 



IV.— The President's Address : The Evolution of Vertebrate Animals in Time. 



By Dr. Henry Woodward, F.R.S 137 



V.— On the Vertical Illuminator. By Edward _M. Nelson 1K5 



VI.— The Influence of the Antipoint in the Microscopic Image shown Graphi- 

 cally. By Edward M. Nelson. (Figs. 47 and 48.) 2G9 



VII.— On a Microscope with Geometric Slides. By Keith Lucas. (Figs. 49-53.) 272 



VIII.— On Certain New Methods of Measuring the Magnifying Power of the 

 Microscope and of its Separate Elements. By A. E. Wright, M.D. 

 (Fig. 54.) 279 



IX.— A Direct Proof of Abbe's Theorems on the Microscopic Resolution of 



Gratings. By Prof. J. D. Everett, F.R.S 38 



X.— Report on the Recent Foraminifera of the Malay Archipelago collected 

 by Mr. A. Durrand, F.R.M.S.— Part XVI. By Fortescue William 

 Millett, F.R.M.S. (Plate X.) 489 



XL— Report on the Recent Foraminifera of the Malay Archipelago collected 

 by Mr. A. Durrand, F.R.M.S.— Part XVII. (Conclusion). By Fortescue 

 William Millett, F.R.M.S. (Plate XL) 597 



XII. — Theories of Microscopical Vision : a Vindication of the Abbe Theory. By 



A. E. Conrady, F.R.A.S. F.R.M.S. (Figs. 95-101) 610 



