510 otph;vb Peocellariifoemf.s. 



spyrofi — Haloboenaii Prion, ïcb TpeTtefi bi» KaiecTBi nepexcuHHxt 

 BBeHBeBi, Daption h Pagodroma h bt» Ka T iecTB'E Hanôojrhe innEi- 

 hhxtj h ôojrïie 6jiu3i;hx'b Meacay coôofl Thalassoeca, Priocella, Ful- 

 marus n Ossifraga, oopamas coBepmeHHO B^pHo BHHMame Ha to, 

 ^to Priocella n Thalassoeca Hejib3a bh;tejist& H3t nocjrE;xHJiro kom- 

 njieKca h othochtb, KaKt sto jrEjiaeT'B Salvin, bi. nojrrpynny, co- 

 CToamyio iist Oestrelata, Puffinus etc. 



., Ossifraga" ,iimiiQ'rb~PYCB,KFT, „is undoubdetly themosthighly 

 specialized of the Procellariinae. With this genus Fobbes has pia- 

 ced Fulmarus, Priocella (Thalassoeca), Thalassoeca (Aeipetes), and a 

 little further removed Pagodroma and Daption. The study of the 

 skeleton seems to confirm the wisdom of this". „ Prion '^roBopnrï. 

 oht. bt> MOHorpachin GrODMAN'a, „ in many respects resenables Dap- 

 tion, but in its pelvis recalls Bulweria and Oestrelata" . Othoch- 

 TejiBHO Pelecanoides ohi. BHCKa3HBaeTca Taict: „the members of 

 the last stand well apart from those of the first-named (Procella- 

 riinae Pycraft) differing conspicously in the characters of 

 the seuil. Other well marked différences, such as the relati- 

 vely great elongation of the sternum, the flattening of the 

 wing-bones and the elongation of the ribs and pelvis are to be 

 set down to adaption, and are therefore of no importance from a 

 systematic point of view. But in the great width of the basi-tem- 

 jjoral platform, and the prominent basipterygoid processes, the 

 Pelecanoidinae stand alone, recalling the Penguins in thèse parti- 

 culars and in the form of pterygoids". „The Diomedeidae hâve 

 undergone spécialisation in many ways, in regard to the skeleton 

 as in other characters. The palate shows this specialization very 

 markedly, for though schizognathous, it approaches very near to 

 becoming desmognathus. Basipterygoid processes are absent. The 

 thoracic vertebrae bear no hypapophyses. The corpus sterni is 

 conspicously pneamatic; and the carina merges into the sternal 

 plate some distance cephalad of the metasternum. The humérus 

 is pneumatic, and the crista inferioris inflated along its preaxial 

 border. The hypotarsus is simple, and the fibular ridge feebly 

 developed. In ail thèse characters the Diomedeidae differ from the 

 rest of the group. Further, this family must be divided into three 

 gênera — Diomedca, Thalassogeron and Phoébetr ia, of wlich Phoebetria 

 is probably the most primitive". 



TaKHM-B OÔpaSOMT,, nOBn^HMOMy HeCOMH'EHHO, ^to npe^cTaBH- 

 Te.Tn pojta Pelecanoides hb^suotcs KpanHHMT. qjieHOMT. rpynnn co 



