LIST OF ILLUSTRATIONS. 
Plate 1.—Sir Richard Owen on Additional Evidence of the Affinities of the Extinct 
Marsupial Quadruped Thylacoleo carnifex (Owen). 
Plates 2 to 5.—Dr. H. Gadow on the Cloaca and the Copulatory Organs of the 
Amniota. 
Plate *3.—Professor T. Carnelley. Mr. J. S. Haldane, and Dr. A. M. Anderson 
on the Carbonic Acid, Organic Matter, and Micro-organisms in Air, more 
especially of Dwellings and Schools. 
Plate 7.—Dr. C. E. Beeyor and Professor Y. Horsley on a Minute Analysis 
(Experimental) of the Various Movements produced by .stimulating in the 
Monkey different Regions of the Cortical Centre for the Upper Limb, as 
defined by Professor Ferrier. 
Plates S and 9.—Mr. J. W. Hulke on Polacanthus Foxii, describing the Dorsal 
Shield-and some Parts of the Endoskeleton, imperfectly known in 1881. 
Plates 10 to 13.—Professor H. Marshall Ward on the Structure and Life-History 
of Entyloma Ranunculi (Bonorden). 
Plates 14 to 16. —Professor H. G. Seeley on the Structure, Organization, and 
Classification of the Fossil Reptilia. 
Plates 17 to 20.— Mrs. G. C. Frankland and Dr. P. F. Frank land on some New 
Micro-organisms obtained from Air. 
Plates 21 to 24. —Professor W. C. Williamson on the Organization of the Fossil 
Plants of the Coal-Measures. 
Plate 25.—Mr. G. Massee on Gasterolichenes: a New Type of the group Lichenes. 
Plate 26.—Mr. E. B. Poulton on the Cause and Extent of a special Colour-relation 
between certain exposed Lepidopterous Pupae and the Surfaces which imme¬ 
diately surround them. 
Plates 27 and 28.—Mr. O. Thomas on the Homologies and Succession of the Teeth in 
the Dasyuridse, with an Attempt to trace the History of the Evolution of 
Mammalian Teeth in general. 
Plates 29 to 31. —Mr. W. H. Caldwell on the Embryology of Monotremata and 
Marsupialia. 
Plates 32 and 33.—Professor H. Marshall Ward on the Tubercular Swellings on 
the Roots of Vida Faba. 
