THE VOYAGE OF H.M.S. CHALLENGER. 
List of Osteological Material examined. 
OcEANITID®. 
Oceanites oceanicis, 
Fregetta melanogastra, 
Garrodia nereis, 
Pelagodroma marina, 
PROCELLARIIDE. 
Skeleton. 
Do. 
Bones of trunk, and of limbs. 
Limb-bones. 
Cymochorea leucorrhoa, Skeleton. 
Procellaria pelagica, Do. 
Bulweria columbina, : 3 4 . Limb-bones. 
Cistrelata “ grisea,” . : ¢ : . Skeleton. 
% si ine. (also named griseus) ; . Do. i (pion (Ooi) 
3 lessoni : : : : . Two skulls. 
Majaqueus equinoctialis, ‘ 5 ; . Skeleton. 
Puffinus anglorum, . é é : ; Do. 
»  obscuras, ; ‘ : ; , Do. 
»  Orevicauda, . : : : 7 Do. (incomplete). 
Adamastor cinereus, . F é : . Skeleton. 
Daption capensis, Skeleton (Eyton Coll.) and skull 
Aeipetes antareticus, . : s 6 : Do. and two skulls. 
Thalasscea glacialoides, . é : 3 Do. 
Fulmarus glacialis,  . : c c : Do. 
Ossifraga gigantea, . . ; : ‘ Do. and skull. 
Prion desolatus, F : : ; ‘ Do. and three skulls. 
»  vittatus, ; F . : . Skull. 
Pelecanoides urinatrix, : . 0 . Skeleton, and sternum. 
Diomedea exulans,  . 6 Skeleton and skull. 
A brachyura, : ; : : Do. 
Thalassiarche melanophrys,  . ; d 5 Do. (Eyton Coll.). 
3 culminata, . : : . Skull. 
Pheebetria fuliginosa, p : ; . Two skulls. 
The skull (vide Pl. VI. figs. 1-6).—The rostrum is long, and strongly-hooked apically. 
It has no distinct hinge with the cranium proper, but the cranio-facial notch is large, 
and the nasal and premaxillary bones at their junction with the frontals so thin as to 
permit of a considerable amount of vertical movement of the beak. 
The nares are large and “ holorhinal,” their posterior boundaries being concave, and 
not extending, by some way, as far back as the posterior ends of the nasal processes of 
the premaxille. In the Diomedeine the nostrils are widely separated, and distinctly 
lateral in position; in the other forms they are closely approximated, and near the 
culmen. The nasal septum is but little ossified, most so in the Diomedeine. There 
may be a couple of small ossifications in the floor of the nasal capsules near their anterior 
extremity, continuous anteriorly with the premaxille, united together in the median line, 
and externally abutting on the outer and lower wall of the nostril. 
