Coal; its history and uses . Fio. 19. Hinder end of mandible of Mastodonsaurus (left-hand figure)and Loxomma. if to give additional leverage to muscles which passedfrom the crown of the skull to the hinder extremity ofthe jaw. Such additional leverage is well adapted to aslow, heavy, and powerful machine. Loxomma, on thecontrary, which, if our conjecture respecting its food bewell founded, needed above all things rapidity in themovement of its jaws, has the condyle at the very end ofthe lower jaw, and loses whatever mechanical advantagemay be due to the post-articular process. It gains intime
Coal; its history and uses . Fio. 19. Hinder end of mandible of Mastodonsaurus (left-hand figure)and Loxomma. if to give additional leverage to muscles which passedfrom the crown of the skull to the hinder extremity ofthe jaw. Such additional leverage is well adapted to aslow, heavy, and powerful machine. Loxomma, on thecontrary, which, if our conjecture respecting its food bewell founded, needed above all things rapidity in themovement of its jaws, has the condyle at the very end ofthe lower jaw, and loses whatever mechanical advantagemay be due to the post-articular process. It gains intime what it loses in force. The accompanying illustration (fig. 20) shows somedetails of the skull of Loxomma,—the mucous grooves 124 COAL. upon the face, which occur in most Labyrinthodonts, butvary much in pattern and degree of development; theexternal nostrils; the large and irregular orbits, which,as in recent Crocodiles, no doubt lodged muscles, glands,and other soft tissues, besides the eye-balls themselves;and the two s
Size: 1782px × 1402px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlo, booksubjectcoal
