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Show 110 MR. J. E. HARTING ON ARCTIC BIRDS. [Feb. 7, EXPLANATION OF PLATES VI. & VIa. Fig. 1. Right lachrymal of R. americana, seen from the side. 2. Right lachrymal of R. darwinii, seen from the side. In both, a marks the surface of articulation with the skull. 3. Ethmoido-nasal region of R. americana, viewed from above. 4. Ethmoido-nasal region of R. darwinii, viewed from above. In both, E marks the horizontal plate of the ethmoid, F the frontals, N the nasals. and I the tip of the nasal process of the intermaxillary. 5. Superior extremity of left tibia of R. darwinii, seen from the inner side, with the epiphysis, a, epiphysis, seen from above. 6. Superior extremity of left tibia of R. americana, showing the strongly developed procnemial process, a, Une indicating the junction of epiphysis. 7. Upper extremity of right tarso-metatarsus of R. darwinii, showing the tarsal element in situ and the separated heads of the three metatarsals. 8. Inferior surface of tarsal element of R. darwinii. 9. Superior surface of heads of three metatarsals of R. darwinii. 10. Upper extremity of right tarso-metatarsus of R. americana, showing anchylosis of tarsal element and of heads of the three metatarsals. 11. Right side of posterior part of pelvis of R. darwinii. 12. Right side of posterior part of pelvis of R. americana. 13. Left coracoid of R. darwinii. 14. Sternal extremity of left coracoid of R. americana. 15. Second and third metacarpals of R. darwinii. 16. Metacarpus and os magnum (a) of R. americana. 2. Catalogue of an Arctic Collection of Birds presented Mr. JOHN BARROW, F.R.S., to the University Museum at Oxford; with Notes on the Species. By JAMES E D M U N D HARTING, F.L.S., F.Z.S. [Received January 6, 1871.] A recent donation by Mr. John Barrow, F.R.S., to the University Museum at Oxford has afforded ornithologists an opportunity of examining an interesting collection of birds from high northern latitudes. Through his interest at the Admiralty, Mr. Barrow was enabled to enlist the services of several naval officers who took part in the various arctic expeditions which were fitted out from time to time between the years 1848 and 1855 ; and through their exertions the present collection was brought together. These officers were:-Capt. Sir Leopold McClintock, F.R.S., Capt. (now Vice-Admiral) Collinson, C.B., H.M.S. 'Enterprise,' 1850-54 ; Mr. Anderson, Surgeon to the 'Enterprise;' Capt. (now Rear-Admiral) Moore, H.M.S.'Plover,' 1849-50; the late Lieut. Elliot, H.M.S. ' Phoenix,' 1853-54 ; Mr. Holman, Surgeon to the 'Phoenix;' Dr. McCormick, H.M.S. 'North Star,' 1852-53; Capt. Penny, H.M. discovery-ship 'Lady Franklin;' Capt. (now Rear- Admiral) Richards, H.M.S. 'Assistance,' 1854; the late Lieut. W . Hulme Hooper, R.N., 1851; Mr. Abernethy, Ice-master to the 'Felix,' 1851. |