CONTENTS 



TRANSACTIONS OF THE SOCIETY. 



PAQK 



I.— On some Foraminifera from the North Sea, etc., <iredge<l by the Fisheries 

 Cruiser ' Goldseeker ' (International North Sea Investigations — 

 Scotland). II. On the Distribution of Saccamina sphaerica (M. Sars) 

 and Psaminosphxra fu>^ca (Schulze) in the North Sea : particularly 

 with reference to the suggested identity of tlie two species. By 

 Edward Heron-Allen, F.L.S. F.G.S. F.R.M.S., and Arthur Earlaud, 



F.R.MS. (Plates I, II, III, IV) 1 



II.— The Unpublished Papers of J. J. Lister. By A. E. Conrady. (Fig.s. 1-3) 27 

 J. J. Lister on the Limit to Definiag-Power, in Vision with the Un- 

 assisted Eye, the Telescope, and the Microscope. (Fig. 4) 34 



III. —The President's Address : *' Bedellus immortalis." By H. G. Plimmer, 



F.R.S., etc. (Plate V) 121 



IV.— African Tardigrada. By James Murray, F.R.S.E. (Plates VI, VII) .. 136 



V —Report on Lenses and other Optical Apparatus of the Lister Legacy. 



By Edmund J. Spitta. L.R.C.P. F.R.A.S 145 



Vi —South American Rotifera. By James Murray, F.R.S.E. (Plates IX 



audX) ^^^ 



VII —Convection-Current Circulation in Laboratory Aquaria : an Aid to the 

 Rearino- of Pelagic Larvae. By James F. Gemmill, M.A. M.D. D.bc. 



(PlatelX) .. 24/ 



VIII —Notes on Chirocephalus diaphanus and Artemia salina. By H. J. Wad- 



dington, F.L.S ^^^ 



IX— British Enchytr^ids. By the Rev. Hilderic Friend, F.R.M.S. (Figs. 



22-35) .. .. ^•'^ 



X —On some Foraminifera from the North Sea, etc.. dredged by the Fisheries 

 Cruiser ' Gold^eeker ' (International North Sea Investigations -- 

 Scotland). III. On Cornuspira diffusa, a new type from the North 

 Sea. By Edward Heron-Allen, F.L.S. F.G.S. F.R.M.S.. and Arthur 



Earland, F.R.M.S. (Plate XII and Figs. 36. 37) ^'^ 



XI— South American Rotifera. Part II. By James Murray. F.R S.E. 



(Plates XIII to XV) .. "^"^^ 



XII.-The Measurement of Working Aperture. By Hamilton Hartridge, I\I.A. 363 

 Xin.-A Method of Investigating Diatom Structure. By Hamilton Hartridge. 



M.A. (Figs. 49, 50) •^^'' 



XlV.-South American Rotifera. Part lll-concludon. By .James Murray, 



F.R.S.E. (Plate XVIII) .. •• ***' 



XV.- Australasian Rotifera. By James Murray, F.R.S.E. (Plate XIX) .. 455 

 XVI -The Higher Bacteria (Sphxrotilus). By E.Moore Mumford. (Plate 



XX) 



XVII.-The Structure of the Nucleus. By K. J. Sheppard, F.R.M.S. (Plate ^^^ 



XXI and Figs. 66, 67) 



XVIII.-Notes on the Familv Cathypnidse. By James Murray, F.R.S.E. (Plates ^^_ 



XXII and XXIII) 



