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Show 316 DR. G.J. ROMANES ON THE MENTAL [ June 4, EXPLANATION OF PLATE XXXII. Diagrammatic representation of affinities of Birds according to their intestinal convolutions. All the names between the two concentric rings refer to Birds which are cycloccelous. All the birds within the inner concentric circle are orthoccelous. Underlined names refer to telogyrous formation. Eelationship is indicated by the excentric circles and by dotted connecting lines. June 4, 1889. Osbert Salvin, Esq., F.R.S., Vice-President, in the Chair. The Secretary read the following report on the additions to the Society's Menagerie during the month of May 1889 :- The total number of registered additions to the Society's Menagerie during the month of May were 172 in number. Of these 121 were acquired by presentation, 6 by exchange, 9 by deposit, 21 by purchase, and 15 by birth. The total number of departures during the same period, by death and removals, was 124. Amongst these I may call attention to an albino variety of the Cape Mole-Rat (Georychus capensis), presented to the Menagerie, May 1st, by the Rev. G. H. R. Fisk, C.M.Z.S. The ordinary colour of this Rodent is a uniform grey ; the present specimen, however, is nearly pure white with black eyes. It lives entirely under the earth like a Mole, and is an interesting animal, though hardly suitable for public exhibition. Mr. H. E. Dresser exhibited and made remarks on some eggs of the Adriatic Black-headed Gull (Larus melanocephalus) and of the Slender-billed Gull (Larus gelastes), which had lately been obtained at their nesting-places in the marshes of Andalusia by Cob Hanbury Barclay, F.Z.S., and himself. The following papers were read :- 1. On the Mental Faculties of the Bald Chimpanzee (Anthropopithecus calvus). By G E O R G E J. R O M A N E S, F.R.S., F.Z.S. [Eeceived June 4, 1889.] The female Chimpanzee, which has now been in the Society's menagerie for nearly six years \ has attracted general notice, not only on account of her peculiar zoological characters, but perhaps still more on account of her high intelligence. This is conspicuously displayed by the remarkable degree in which she is able to understand the meaning of spoken language-a degree which is fully equal to that presented by an infant a few months before emerging from 1 Cf. Bartlett, P. Z. S. 1885, p. 673, pi. xii. |
