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Show 2 markedly smaller tban either, and with a distinct pygal band. Skull of an adult male only 198 m m . in basal length. Hab. S. of Daua River, Boran Country. Type. B.M. No. 4.1.20.1. Presented to the British Museum by A. E. Butter, Esq. Mr. MACLEOD YEARSLEY, F.R.C.S., exhibited an aneurysm of the abdominal aorta from a Jaguar and photographs of one in a Turtle. Both specimens were in the College of Surgeons' Museum, the latter being Hunterian. The aorta in the case of the Jaguar was extensively atheromatous. A communication from Mr. GUY A. K. MARSHALL, F.Z.S., entitled " A Monograph of the Coleoptera of the Genus Hippo-rhinus Schh.," was read. It contained an enumeration of the 138 known species of the genus, of which 50 were described as new. A paper on " Proposed Additions to the accepted Systematic Characters of certain Mammals " was read by Dr. W A L T E R KIDD, F.Z.S., in which two groups of phenomena were considered. First, the arrangement of hair on the naso-frontal region was dealt with and two leading types described; second, the distribution of whorls in certain forms was held to be of sufficient importance to be included in the description of the species and genera. In both divisions of the subject the results were shown to agree with accepted classification. Dr. W. G. RIDEWOOD, F.Z.S., read a short paper on " Some Observations on the Skull of the Giraffe," based upon the examination of a series of sections taken at right angles to the median plane of the head, and more or less transverse to the axis of the skull. The investigation was primarily undertaken with the object of arriving at an explanation of the fact that the bases of the paired horns or ossicusps of the adult are much more hollowed out than are those of the young animal; but other features of interest concerning the extent and relations of the cranial sinuses were also dealt with. Mr. F. E. BEDDARD, F.R.S., read a note on the brains of the Potto (Perodicticus potto) and the Slow Loris (Nycticebus tardigradus), and made some observations upon the arteries of the brain in certain Primates that had died in the Society's Menagerie. Dr. C. W. ANDREWS, F.Z.S., gave a description of the bones of the pelvis and hmd-limb of Mullerornis betsilei, one of the small forms of birds of the family ^Epyornithidaj. Except for their smaller size and relatively more slender proportions, no important differences from the corresponding bones of such species as ^pyornis mulleri or hildebrandti were observed, and no light was |