. Contributions to the anatomy of birds . jrypMtsthan in any other member of the family. The remainder and nnde-scribed half of each torn mm running backwards is flat or slightlyrounded, and includes on either side about the anterior fourth ()to the seventh of the maxillary (Pseudogryphits). Owing to the deepsides, the inferior aspect of the upper mandible is very much scoopedout, and strongly reminds one of a well-shaped canoe; two sharp littleridges, one on either side, start from the tip of the beak here, and runbackward as far as the palatine articulation, being nearly parallel witht
. Contributions to the anatomy of birds . jrypMtsthan in any other member of the family. The remainder and nnde-scribed half of each torn mm running backwards is flat or slightlyrounded, and includes on either side about the anterior fourth ()to the seventh of the maxillary (Pseudogryphits). Owing to the deepsides, the inferior aspect of the upper mandible is very much scoopedout, and strongly reminds one of a well-shaped canoe; two sharp littleridges, one on either side, start from the tip of the beak here, and runbackward as far as the palatine articulation, being nearly parallel withthe tomial edges at the middle of their course. The maxillo-palatinefissure is wide and sub-elliptical in outline, terminating posteriorly byan opening in its arc that leads into the true inter-palatine cleft. (, PI. XX.) In all of the CathartkJce we find just within the lower oorder of eachnostril a diminutive bony shelf, formed partly by the palatine, partlyby the lateral £>rocesses of the intermaxillary; following this along. Cathartes aura, towards the tip of the beak we find it to terminate in a conical socketon either side. In C. atnrata they can be seen just within the anteriormargin of each nostril, while in Pseudogryplius they are a full centimetrebeyond. the bony nostrils in these birds are placed upon the sides of the supe-rior mandible and very nearly in their same planes. In form theyassume more or less of an oval outline, being long and narrow in atrata,high and broad in the Californian Condor and the Turkey Buzzard. In Pseudogryplius and Sareorhamphus,\ess so in Cathartcs, their inferiorand posterior margins blend with the transverse plate of the ethmo-tur- shufeldt.] OSTEOLOGY OF THE CATHALITID^E. 743 binal coming from within-, this can hardly be said of G. atrata, as thelatter bone in this Vulture is so far removed backwards into the rhinalcavity. The forms of the nostrils among the Cathartidw can be betterstudied from the various figures in the plate
Size: 1454px × 1719px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1882
