CONTENTS. 



TRANSACTIONS OF THE SOCIETY. 



PAGE 



I. — On the Male Genital Armature of the Dermaptera. Part III. : Euder- 

 maptera. By Malcolm Burr. 3I.A. D.Sc. F.L.S. F.E.S. Communicated 

 by Johu Hopkiiisou, V.-P. K.M.S. (Plates I-IV) 1 



II.— Fifth List of New Eotifers since 1889. (Period 1912-1915.) By Charles 



. F. Rousselet, F.R.M.S 19 



III. — The Foraminifera of the Shore-sands and Shallow Water Zone of the 

 South Coast of Cornwall. By Edward Heron-Allen, F.L.S. F.G.S. 

 F.ii.S. F.R.M.S., and Arthur Earland, F.R.M.S. (Plates V to IX) .. 29 



IV. — The Supposed Exhibition of Purpose and Intelligence by the Foraminifera. 



By Sir Ray Lankester, K.C.B. F.E.S 133 



V. — Statoblasts of Fresh- water Polyzoa. By C. F. Rousselet 141 



VI.— Alien Olitrochsets in England. By The Rev. Hilderic Friend, F.R.M.S. 



(Figs. 1 to G) 147 



VII. — Amstutz Optical Micrometer. By Marshall D. Ewell. (Fig. 7) .. ,. 158 



VIII. — Prolegomena towards a Study of the Progress and Development of Vision 

 and Definition under the Microscope. (1G73-1848.) By E. Heron- 

 Allen, F.L.S. P.R.M.S., and Charles F. Rousselet, F.R.M.S 160 



IX. — A Case of Apparent Intelligence exhibited bv a Marine Tube-building 



Worm, Terebella conchilega. By Arnold T. Watson, F.L.S. (Figs. 11, 12) 253 



X.— Studies in Marine Biology. By F. Martin Duncan, F.R.P.S. (Figs. 



13,14,15) ' 257 



XI. — Alien Oligochsets in England. By Tlie Rev. Hilderic Friend. (Figs. 



16 to 20) 262 



XII. — Some Suggestions regarding Visual Efficiency in the Use of the Microscope 



and other Optical Instruments. By J. W. Purkis, A.R.C.Sc. .. .. 272 



XIII. — The Life-history of Mycetozoa, with special reference to Ceratiomyxa. 



By Gulielma Lister. (Plates X, XI) 361 



XIV. — Originative Factors in Evolution. By Professor J. Arthur Thomson, 



M.A.LL.D 437 



XV. — On Certain Parasites of the Mouth in Cases of Pyorrhoea. (Preliminary 

 Communication.) By Elen Pixell Goodrich, D.Sc, and M. 3Ioseley. 

 (Plates XII-XYII) 513 



XVI. — Studies in Pleomorphism in Typhus and other Diseases. By Edward 



C. Hort, M.D 528 



XVII. — New Tank, and I'und-weed Holder, to "be used with the Greenough 



Microscope. By Sydney C. Akehurst, F.R.M.S. (Plates XVIII-XIX) 534 



