1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 2G3 



Well over this vomer, in the median line, the rostrum is extended as 

 a long spiculiform process. The anterior ethmoidal margin is sharp, 

 but becomes broad as the bone abuts against the region of the cranio- 

 facial hinge. Beyond this it is sometimes extended as a semiosseous 

 median supero-rhinal septum. 



The palatines are also unusually broad, their postero-external augles 

 being well rounded off. Laterally they are quite horizontal, but each 

 inner margin, just beyond the palatine heads, is turned down for a short 

 distance as a prominent inner carination. 



Thoroughly developed basi pterygoid processes meet to articulate with 

 others coming from the pterygoid bones themselves. Huxley found 

 those present also in the Giant Fulmar, and I have reason to suspect 

 their presence in the Shearwaters {Puffinus). 



In Kodgers' Fulmar the occipital condyle is hemispherical in form, 

 and the outline of the foramen magnum subcircular. 



I regret to say that I can offer nothing upon the hyoid arches of this 

 Fulmar, as that part of the skeleton has been lost in all the specimens. 



In the mandible the symphysis is short and sunken between the con- 

 vex ramal walls. It protrudes slightly in front as a blunt process. 



Fig. 4. Basal view of the skull of Fulmar us glacialis rodgersii; inaudible removed. 

 Fig. 5. Mandible of the same specimen, viewed from above. 



Fig. 6. The vomer of the same, from above. All these figures an- life size, and drawn by the author 

 *rom specimen 12G13 of the Smithsonian collection. 



Both superior and inferior borders of the bone are rounded and the 

 corouoid processes very feebly developed. 



Each surangular is pierced by an elliptical foramen, but the true 

 ramal vacuity is covered over by the extended growth of the mandib- 

 ular elements. 



