( 2 ) 



JOURNAL 



OF THE 



KOYAL MICROSCOPICAL SOCIETY. 



VOL. III. No. 3. 



CONTENTS. 



Transactions of the Society— pace 



XI. On a Parasitic Sponge op the Order Calcarea. By 

 Prof. P. Martiu Duncan, M.B. (Lond.), F.R.S., V.P.R.M.S. 

 (Plate X.) 377 



XII. The Genus Ravenelia. By M. C. Cooke, M.A., LL.D. 



(Plate XI.) 384 



XIII. On the Double and Treble Staining of Animal Tissues 



FOR Microscopical Investigations; with a Note on 

 Cleaning Thin Cover-glasses. ByHeneage Gibbes, M.B., 

 F.B.M.S 390 



XIV. On some New Species of Nitzschia. By A. Grunow, Hon. 



F.K.M.S. (Plates XIl. and XIII.) 394 



XV. On the Illumination of Objects under the Higher 



Powers of the Microscope. By James Smith, F.R.M.S. 398 



Record of Current Researches relating to Invertebrata, 



Cryptogamia, Microscopy, &c. .. .. .. .. 400 



Zoology. 



Formation of Oca aiid caries 400 



Destruction of Ova and Spermatozoa 4(10 



Theory of the Ovum 401 



Development of the Germ-layers of the Rabbit 401 



Production of Sex 404 



Oriqiii of the Sexes 405 



Dichogamous Animals 405 



Or/fjin of the Utd Corpuscles of Mammalian Blood 40G 



EpUhelial Cells 407 



Living Curtilacjinous Cells 407 



Growth o^ a Function of Cells 408 



Animal Cellulose 409 



Influence <f Light on Animah 4(t9 



Alcohol in Animal Tissues during Life and after Death 4il 



Changes in Form, Movements, Sfc 412 



Process of Digestion in the Livertebrata .. .. 412 



Fffects of Poisons on Invertebrata .'. 41H 



Distribution of Chlorophyll in Itivertebrata 413 



Pelagic Fauna of the Lakes of Tessi a and Italy 413 



Divelopment (f the Pulmonate Gasteropoda. 414; 



Development of Lymn feus stagnalis 415 



Formation of the Shell in the Snails 417 



