110 MR. J. E. HARTING ON ARCTIC BIRDS. [Feb. 7, 



EXPLANATION OF PLATES VI. & VTA 



Fig. 1. Right lachrymal of R. americana, seen from the side. 



2. Eight 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 S. 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. 

 C. Superior extremity of left tibia of R. americana, showing the strongly 

 developed procnemial process, a, line 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 meta- 

 tarsals. 



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. Eight side of posterior part of pelvis of R. darwinii. 



12. Eight 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 by 

 Mr. John Barrow, F.R.S., to the University Museum 

 at Oxford; with Notes on the Species. By James 

 Edmund Harting, F.L.S., F.Z.S. 



[Eeceived January 6, 1871.] 



A recent donation by Mr. John Barrow, F.R.S., to the University 

 Museum at Oxford has afforded ornitbologists 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 M c Clintock, 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. M c Cormick, 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. 



