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Show 11 characters of the intestinal tract in the different Mammalian groups, and concluded with the inferences as to the affinities of these groups that the patterns supplied. Lieut.-Col. C. D elme-R adcliffe, M.Y.O., F.Z.S., gave an account, illustrated by a fine collection of specimens and a series of lantern-slid es, of the Natural History of Western Uganda, deduced from observations and collections made by him while acting as British Boundary Commissioner on the Uganda frontiers. Dr. H. G adow, F.R.S., read a paper on the Distribution of Mexican Amphibia and Reptilia. After a critical revision of the species recorded from Mexico, the Author stated that he grouped them according to the prevailing physical features of the country. It was found that Mexico had received its present fauna from both the Northern and the Southern Continents. The Northern immigrants had spread over high tablelands and mountains, whilst not a few species had descended into the hot lowlands, even into Central America and still further south. On the other hand, the Southerners were divided by the plateau into an Atlantic and a Pacific mass, each having had time to modify many of its members according to the very different physical features. Scarcely any of these Southerners had ascended the plateau, but they were not averse to ascending high outlying mountains. A comparative list of species confined to high altitudes was given, and the conclusion arrived at, with the help of geological data and the fauna of the Antilles, was that the exchange between the North and South took place during the Miocene epoch, at which period alone the Antilles were connected with Central America. Mr. G. A. B oulenger, F.R.S., described the new species of Reptiles discovered in Mexico by Dr. H. Gadow. Mr. G. A. B oulenger also presented a paper containing an account of the Batrachians and Reptiles collected in South Africa by Mr. C. H. B. Grant and presented to the British Museum by Mr. C. D. Rudd. Mr. F. E. B eddard, F.R.S., communicated some notes on the Anatomy of the Yellow-throated Lizard, Gerrhosaurus flavigularis. Mr. B eddard also presented notes on the Cerebellum in the Exanthematic Monitor, Varanus exanthematicus, and on the Cerebral Hemispheres in the Taraguira Lizard, Tropidurus hispidus. Mr. R ichard A ssheton, F.Z.S., communicated a paper on the Fcetus and Placenta of the Spiny Mouse, Acomys cahirinus. The paper pointed out that the foetus, received from the Society's Gardens, was covered by a thin epitrichium which was perforated |