VI CONTENTS. 



PAGE 



E. A. Minchin, M.A., F.R.S. Some Details in the Anatomy of the 



Rat Flea (Ceratophyllus fasciatus). (Plates 26-32) . .441 



Arthur Dendy, D.Sc., F.R.S. President's Address. The Bio- 

 logical Conception of Individuality .... 465 



W. Williamson, F.R.S.E., and Charles D. Soar. F.L.S., 

 F.R.M.S. British Hydracarina : The Genus Lebertia. 

 (Plates 33 and 34) 479 



J. W. Gordon. A " New " Object Glass by Zeiss (Figs. 1 and 2) 515 



G. T. Harris. Microscopical Methods in Bryological Work . 52 ! 



Proceedings, etc. 



Proceedings from October 27th, 1914, to February 23rd, 1915, 



inclusive . . . . . . . . .537 



Forty- ninth Annual Report, 1914 . . . . . .551 



Report of the Treasurer, 1914 . . . . . . 558 



Obituary Notice : F. W. Millett, F.G.S., F.R.M.S. . . . 559 



PART No. 77, NOVEMBER 1915. 



Papers. 



M. A. Ainslie, R.N., B.A., F.R.A.S. An Addition to the Ob- 

 jective (Figs. 1 and 2) ..... 561 

 A. A. C. Eliot Merlin, F.R.M.S. Notes on Diatom Structure . 577 

 G. T. Harris. A Note on the Slides of Fissidentaceae in the 



Q.M.C. Cabinet 581 



A. E. Hilton. Further Notes on the Cultivation of Plasmodia 



of Badhamia utricularis ...... 585 



James Burton. Hydrodictyon reticulation .... 587 



E. M. Nelson, F.R.M.S. Various Insect Structures . . . 593 



J. W. Evans, D.Sc, LL.B. (London). The Determination of 

 Minerals under the Microscope by means of their Optical 



Characters (Plates 35-37) 597 



David Bryce. On Five New Species of the Genus Habrotrocha 



(Plates 38 and 39) 631 



Notices of Books (Plate 40) ...... 643 



Proceedings, etc. 



The Club Cabinet, Additions to . . . . .646 



Proceedings from March 23rd to June 22nd, inclusive . . 653 



Obituary Notice : E. A. Minchin, M.A., F.R.S. (Portrait) . 669 



Index to Volume XII. . . . . . . . 673 



