568 Recenthj published Ornithological Works. 



which will theu form by far the most haudy and convenient 

 manual on the subject yet published. 



115. Shufeldt on the Osteology of Circus hudsonius. 



[Osteology of Circus hudsonius. By R. W. Slmfeldt, M.D., C.M.Z.S. 

 Reprinted from the Jouvn. Comp. Medicine & Surg-. April 1889.] 



Dr. Shufeldt's object in the present memoir is " simply to 

 present a detailed account of the osteology of a good repre- 

 sentative American Hawk.'^ This, we need hardly say, he 

 has well accomplished, though we are not quite sure that 

 Circus ought to have been selected as a typical Falconine 

 bird. As is always the case in Dr. Shufeldt's memoirs, the 

 figures are clearly drawn and distinctly cut. 



116. Shufeldt on the Osteology of the Anseres. 



[Observations upon the Osteology of the North-American Anseres. By 

 Dr. R. W. Shufeldt. Proc. U.S. Nat. Mus. xi. p. 215.] 



Dr. Shufeldt gives us here a good account of the osteology 

 of some of the North-American Auatidse, such species as 

 Mergus serrator, Somateria dresseri, Spatula clypeata, Glau- 

 conetta islandica, and Bernicla hutchinsi being selected for 

 illustration. It would be very good of the author to examine 

 a larger series of forms of this family, and to show us how it 

 may be divided most naturally into subfamilies. This is one 

 of the groups in which osteological structure could not fail 

 to be of primary importance in the indication of affinities. 



117. Shufeldt on the Osteology of the Water-Birds. 



[Contributions to the Comparative Osteology of Arctic and Sub-Arctic 

 Water-Birds. Part III. By R. W. Shufeldt, M.D., C.M.Z.S. Journ. 

 Anat. & Physiol, xxiii. p. 400.] 



We have already noticed the first two parts of this series 

 of memoirs [supra, pp. 252, 393). The third, now before 

 us, contains a further account of the Alcidse, and deals with 

 the skeletons of Synthiborhamphus , Brachyrhamphus, and 

 Cepphus. When the Alcidae are finished we hope that the 

 author will be able to state the results arrived at in a more 

 definite form. 



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