90 



NATURAL HISTORY OF BIRDS. 



Another group is rcpresentcil l)y the i.'«?n"^ Prion, very rpniarkalilo for its very 

 peculiar and In-oail bill, which is provided with a fringe of lamella,', somewhat similar 

 to those of tlie clucks. 



The well-known 'Cape pigeon' {Daption capense) also shows nuliments of 

 lamelhe, Imt is rather referable to the next irrouj), including the fulmars. The liinl 

 rejjresented in the cut is the /'''uloiarKx f/lacin/is, already mentioiieil in the Intrixluc- 

 tion for its remarkable dichromatism. Tm this grouj) also belong the giant fulmar 

 {Ossifrnt/ii iihiiiiited), from tlie southern seas, nearly as large as the smaller albatrosses, 

 and dichromatic, like its northern relative. The last grou]> comprises several genera 



Fio. 38. — Futmarus glacialis, arctic fulmar. 



of shearwaters (which are characterized by a four-nntche<l sternum), including the very 

 remarkable genus JhiJii-eria, which has a wedge-shaped tail, and the highly specializol 

 muscular f<irniula AX. 



The third and last family of the Tubinares are the Pelecaxoidid.e. In their 

 e.\ternal appearance they present a striking resemblance to several of the smaller a\iks, 

 being adajjted to tlie same mode of life, and this adajitation has not only affected 

 their external characters, the length of wings, etc., but also some of their anatomical 

 features; for instance, the compressed form of the wing bones, the elongated sternum, 

 and the very long and oblicjuely placed ribs, have been modified in the same direction, 

 so as to resemble the corresponding ]>arts of auks and guillemots, though these analo- 

 gies do not indicate any nearer relationship; of course, the opposite view being only 

 founded ii])on a comiilele iuisconce]>tion <«f their whole structure. Compared with 

 other Tubinares, we note that the end of the nasal tubes, on top of the bill, is cut off 



