THE VOYAGE OF THE < CHALLENGER.' 369 



A. Fulmareae 



Ossifraga, Fulmarus, Adamastor, Daption. 



B. (Estrelatese 



(Estrelata, Cookilaria, Pterodroma, Thalassceca, Pagodroma. 



C. PrioneaB 



Priori, Halobcena. 



D. Procellarieae 



"* Unguibus compressis" ; Bulweria, Oceanodroma, Thalassidroma, 



Procellaria. 

 u ** Unguibus depressis"; Fregetta, Pelagodroma, Oceanites. 



E. Puffineae 



Majaqueus, Thiellus, Nectris, Puffinus. 



1866. In this year Dr. Elliott Coues completed his Critical Review of 

 the family Proeellariidas commenced in 1864 *. 



This is the most complete account yet published of the synonymy and 

 distribution of the species of this group, which is divided into 24 genera, 

 containing 92 species (17 of these being doubtful). Following Bonaparte, 

 the same three subfamilies are adopted, the Procellariinae, as before, 

 being subdivided into five groups. 



The genera composing these are as follows : 

 Section Procellariese 



Oceanodroma, Cymochorea, Halocyptena (gen. nov.), Procellaria, 



Oceanites, Freyetta, Pelagodroma. 

 Section PuffineaB 



Majaqueus, Adamastor, Thiellus, Nectris, Piiffinus. Exp. vol. ir. 



Section (Estrelateze P fc - xi - P- 7- 



(Estrelata, Pagodroma, Daption. 

 Section Prioneae 



ffalobcena, Pseudoprion, Prion. 

 Section Fulmareae 



Fulmarus, Thalassceca, Ossifraga. 



Although the names of these five sections are the same as Bonaparte's, 

 yet the genera included in them are, it will be seen, different, the arrange- 

 ment in many respects being more natural. 



1867. Eyton in his ' Osteologia Avium ' f describes briefly some of the 

 more salient features of the osteology of Ossifraga gigantea, Diomedea 

 exulans and fuliyinosa, Puffinus major (and another undetermined species), 

 and Thalassidroma oceanica(= e ? Oceanites). The skeletons of the Ossifraga, 

 Diomedea exulans, and Thalassidroma are figured, with details of some of 

 the bones. 



* Proc. Ac. Nat. Sci. Philad. 1864, pp. 72-91 (part 1), and pp. 116-144 (part 2) ; 

 loc. cit. 1866, pp. 25-33 (part 3), pp. 134-197 (parts 4 and 5). 

 t London, 1867, pp. 221-225. 



