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Show 212 MR. P. L. SCLATER ON CASUARIUS SALVADORII. [Feb. 19, Anous cinereus (Neb.), Finsch and Hartl. F. Central-Polynesiens, p. 239 (1867), Phoenix group, 3° 8'S., 171° W., nee Gould. Hab. Pacific, from a little north of the Equator; Christmas Island; the Ellice group, 9° S., 179° E., whence there are two specimens in, the British Museum recently obtained by the Rev. S. J. Whitmee; the Phcenix group ; and Honden Island, Low archipelago. ANOUS CTNEREUS, Gould. Pelecanopuspelecanoides, G. R. Gray, L. Birds Brit. M . iii. p. 180 (Australia, presented by Sir T. Mitchell). Anous cinereus, Gould, P.Z.S. 1845, p. 104 (N.E. Australia); id. B. Australia, vii. pl. 76 (1848), Norfolk I. and N.E. coast Australia. Procelsterna albivitta, Bp. Compt. Rend.xiii. 1856, p. 773 ; Gould, Hand-b. B. Austr. ii. p. 420 (1865); Grav, Hand-1. iii. p. 123 (1871). Sterna cinerea, Schlegel, M . P.-Bas, Sternee, p. 38 (1863), Australia. Anous albivittatus, Finsch, P. Z. S. 1877, p. 776 (Eua, Friendly group). Hab. Norfolk Island; N.E. Australia and the Tonga or Friendly group, in about 22° S., 175° W . It is presumably the species observed by Mr. E. L. Layard in the Fiji group. The range of these two species appears to be nearly parallel, that of A. cceruleus being the more northerly. A. cceruleus is smaller than A. cinereus, Gould, and is darker all over, especially on the underparts, which are blue-grey, whereas in A. cinereus they are nearly white. The differences are too great to be explained away as being due to age, and I admit the distinctness of the two species; but they are very closely allied. The fact of their being found in such close proximity within so limited an area is very remarkable. February 19, 1878. Prof. Mivart, F.R.S , V.P., in the Chair. Mr. P. Geddes read a memoir on the mechanism of the odontophore in certain mollusca. In this paper the view of Cuvier that the movements of the radula depend upon those of the underlying cartilages was substantially revived. Arguments were adduced against the more recent theory of Prof. Huxley that it runs like a chain-saw, the cartilages merely forming a pulley-block. The use of bacteria as food by Limnceus was also described in the memoir, which will be published in the Society's ' Tranasctions.' Mr. Sclater exhibited the skin of a fine adult Cassowary, which had recently been acquired for the collection of the British Museum. The specimen was labelled " Wandamrnen, May, 1876," and was |