42 



THE VOYAGE OF H.M.S. CHALLENGER. 



List of Osteological Material examined* 



Oce.vxitiiu:. 



Oceanites oceanicus, ..... Skeleton. 



Fregetta melanogastra, .... Do. 



Garrodia nereis, ..... Bones of trunk, and of limbs. 



Pelagodroma marina, .... Limb-bones. 



Proceli.aiuih.k. 



Cymochorea leucorrhoa, 

 Proeellaria pelagica, 

 Bulwcria coin iiihin a, 

 CEstrelata " grisea" . 



„ sp. inc. (also named grist us) 



„ lessoni 

 Majagueus cequinoctialis, 

 Puffinus anglorum, 

 „ dbseurus, 

 „ brevicauda, . 

 Adamastor dnereus, . 

 Daption eapensis, 

 Aeipetes antarcticus, . 

 T/ialasscosa glacialoides, 

 Ftdrnarus glacial/*, 

 Ossifraga gigantea, 

 Prin, i desolatus, 



„ vittatus, 

 Pelecanoides urinatrix, 

 Diomedea exulans, 



„ brachyura, 

 Tlialassiarche melanqphrys, 



„ cnlmiuata, 



Pho'liitria fnl 'iiji no*tt , 



1 



(Ey ton Coll.). 



(incomplete). 



Skeleton. 



Do. 

 Limb-bones. 



Skeleton. 



Do. 

 Two skulls. 

 Skeleton. 



Do. 



Do. 



Do. 

 Skeleton. 

 Skeleton (Eyton Coll.) and skull 



Do. and two skulls. 



Do. 



Do. 



Do. 



Do. 

 Skull. 



Skeleton, and sternum. 

 Skeleton and skull. 



Do. 



Do. (Eyton Coll.). 

 Skull. 

 Two skulls. 



and skull. 



and three skulls. 



TJie skull (vide PI. VI. figs. 1-6). — The rostrum is long, and strongly-hooked apicaHy. 

 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 arc 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 premaxillse. In the Diomedeinpe 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 Diomedeina?. There 

 may be a couple of small ossifications in the floor of the nasal capsules near their anterior 

 extremity, continuous anteriorly with the prernaxillse, united together in the median line, 

 and externally abutting on the outer and lower wall of the nostril. 



