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Show 520 MR. H. SAUNDERS ON LAR1D.E [Julie 6, small cavities which rather increase in size towards the surface each gland. Anal Glands. There are constantly two anal glands, one on each side of the anus, in all iEluroids. The glandular structure may be a transverse band of follicles extending between the two anal glands, as in (at least some) Herpestes, Crocuta, and Proteles. The anal glands may be augmented to three pairs, as in Hyana brunnea 1, or even to five pairs, as in Crossarchus. These glands, together with the anus, may open into a deep anal pouch, as in the Hyanida, Crossarchus, Suricata, and Cryptoprocta; or the anus may open on the surface of the body, as in the Felida and almost all, if not all, the Viverrina. 2. On some Larida from the Coasts of Peru and Chili, collected by Capt. Albert H. Markham, R.N., with Remarks on the Geographical Distribution of the Group in the Pacific. By H O W A R D SAUNDERS, F.L.S., F.Z.S. [Received May 16, 1882.] (Plate XXXIV.) Capt. A. H. Markham, already well known for his circumpolar explorations, has availed himself of the opportunities afforded by his appointment to the command of H.M.S. 'Triumph,' on the South- Pacific station, and has sent home from there an interesting collection of birds. The specimens belonging to the Procellariida have been placed in the hands of Mr. Osbert Salvin, who has made that family his special study; and the present paper is limited to the Larida, of which the collection contains examples referable to 15 species. Amongst these is a specimen of that rarest of Gulls, and one of the rarest of all birds, Xema furcatum (the large forked-tailed congener of the circumpolar Xema sabinii), a species of which only two examples were previously known, and the rediscovery of which, after forty years' fruitless search, is due to the energy of Captain Markham. The following Larida were obtained between Payta, in 5° 11', and Coquimbo, in 30° S. lat. In addition to the original name of each genus and species, only those references are given which bear upon geographical distribution in the Neotropical Kegion. N^ENIA INCA (Lesson). Sterna inca, Lesson, Voy. 'Coquille,' ii. p. 731, Atlas, pl. 47 (1826). Nania inca, Boie, Isis, 1849, p. 189 ; Scl. & Salv. P. Z. S. 1871, p. 567 ; Saunders, op. cit. 1876, p. 667. [No. 28 ( cS adult), no. 29 (6 immature), Callao Bav, August 1881.] ' B In the latter the general hue of the upper parts is of a smoke- 1 Trans. Zool. Soc. vol. vii. p. 506. |