( 2 ) 



JOURNAL 



OF THE 



EOYAL MICROSCOPICAL SOCIETY, 



VOL. III. No. S. 



CONTENTS. 



Tkansactions of tue Society — ,.a,:b 



XX. On the Structure and Function of the Scale-Leaves of 

 Lathrea squamabia. By W. H. Gilburt, F.R.M.S. (Plate 



XVII.) 737 



XXI. On Daylight Illumination with the Plane Mirror. An 

 Appendix to Part I, of the *' Theory of Illuminating 

 Apparatus." By tlie late Dr.. H. E. Fripp, Ex-off. F.R.M.S. 



(Figs. 66-70) 742 



XXII. On an Improved Finder. By W. Webb. (Figs. 71 and 72) 750 



XXIII. On Tollbs' Interior Illuminator for Opaque Objects. By 

 William A. Rogers, F.R.M.S. ; with Note by R. B. Tolles, 



F.R.M.S. (Figs. 73 and 74) .. .. .. .. 754 



Record of Current Researches relating to Inveutbbkata, 



Cbyptogamia, Microscopy, &c. .. .. .. .. 759 



Zoology. 



Development of the liaJibit 759 



Development of the " Glomerulus of the Ilead-Kidney^' in the Chick .. .. 75.) 



Cellular Evolution of Frotoplcmm 7G0 



Imperfection of the Geological Record 7G0 



Mollusca of the ' Chdknger ' Expedition 7G1 



Antiquity of certain Subordinnte Types of Fresh-iualer and Land Mollusca 7(J3 



Development of the Digestive Tract in the Mollusca 7ti3 



Action of Poisons on the Cephali'puda 7(i4 



Begeneration of the Head in Gastropods 765 



Activity and Structure of the Muscles of Mollusca Acepltala 76.5 



Pedal Glands of the Tellinidx 765 



Anatomy of the Bullidea 766 



Development of Teredo .. .. 770 



Development uf Lingula 772 



Struiure of Adeona 773 



New Genus of Polyzoa 774 



Little-hnoxvn Organ of the Dymenoptera 774 



Honey-hearing Ants 775 



Stru-ture of the Lampyridx with reference to thuir Phosjihurescencc .. .. 777 



Influence of Temperature in producing Varieties of Lepidoiitcra .. .. 170 



Protective Attitude of the Caterpillar of the Lobster Mutk 780 



Odoriferous Apparatus of Sphinx ligustrl 7; 



Spinning Organs (f Insect Larvie 781 



Parthenogenesis in iJalictus • 7M1 



Gulls produced hy Aphides 782 



