| OCR Text |
Show 1046 ON THE OSTEOLOGY OF THE PYGOPODES. [ Dec. 19. pro. = prootic. so.I. - supraorbital ledge. JB£.--= pterygoid, sq. - squamosal. q. - quadrate. sq.p.- squamosal prominence. s.a. =supra-angular. .sg./)W. = squamoso-parietal wing. i.e. = sagittal crest. t.f.= temporal fossa. A-.O. = supraoccipital. *V.-^trigeminal foramen. so.g. = supraorbital groove. v. = vomer. Fig. 1. Dorsal aspect of the skull of Podicipes cristatus (p. 1020), to show the well-developed sagittal crest, temporal fossae, coronal ridge, squamoso-parietal rings, the free lachrymal, and the feeble supraorbital grooves. Fig. 2. Dorsal aspect of the skull of Colymbus septentrionalis (p. 1020), to contrast with fig. 1, with the great development of the supraorbital grooves and ridges and the lachrymal fontanelle. Fig. 3. Lateral aspect of fig. 2 (p. 1021), showing the conspicuous cerebellar prominence, temporal fossa, and supraorbital ledge. Fig. 4. Lateral aspect of the skull of a nestling Podicipes cristatus, outer view (p. 1030), to show the unclosed sutures. Fig. 5. Lateral aspect of the skull of a nestling Podicipes cristatus, inner view, to show the unclosed sutures. Fig. 6. Ventral view of skull of an adult Colymbus septentrionalis (p. 1026), to show the schizognathous palate. Fig. 7. Lateral aspect of a portion of the pterygoid and palatine of Colymbus glacialis (p. 1032), to show the hemipterygoid. |
