LIST OF ILLUSTRATIONS. 
Plates I. to III. — Drs. J. Plucker and J. W. Hittorf on the Spectra of Ignited Gases 
and Vapours. 
Plates IV. to IX. — Professor Huxley on the Osteology of the genus Glyptodon. 
Plates X. & XI. — Staff-Commander Evans and Mr. A. Smith on the Magnetic Cha- 
racter of the Armour-plated Ships of the Royal Navy. 
Plates XII. to XIX. — Mr. W. K. Parker and Professor T. R. Jones on some Forami- 
nifera from the North Atlantic and Arctic Oceans. 
Plate XX. — Professor Kopp on the Specific Heat of Solid Bodies. 
Plates XXI. and XXII. — Professor Beale’s New Observations upon the Minute Anatomy 
of the Papillae of the Frog’s Tongue. 
Plates XXIII. to XXVII. — Professor W. Thomson on the Embryogeny of Antedon 
rosaceus , Linck ( Comatula rosacea of Lamarck). 
Plates XXVIII. & XXIX. — Professor Roscoe on a Method of Meteorological Regis- 
tration of the Chemical Action of Total Daylight. 
Plates XXX. to XXXV. — Mr. E. W. Binney on some Lower-coal-seam Fossil Plants. 
Plates XXXVI. to XXXVIII. — Mr. W. H. Flower on the Cerebral Commissures of 
the Marsupialia and Monotremata. 
Plates XXXIX. to XLI. — Professor Owen on the Marsupial Pouches, Mammary 
Glands, and Mammary Foetus of the Echidna Eystrix. 
