. Bulletin of the British Museum (Natural History). THE MORPHOLOGY OF THE HEAD OF THE HAWFINCH ft. d. m. 379 A. m. p. ft. d. m. I. ft. d. I. Fig. 4. Coccothraustes coccothraustes. a, Diagrammatic view of the right side of the head, eye and eye muscles removed to expose the jaw muscles in the orbit. B, Dia- grammatic dorsal view of the right orbit. A ., M. Adductor mandibulae posterior; E. md., M. Ethmo-mandibularis ; Pst., M. Pseudotemporalis (M. Adductor mandibulae internus) ; , M. Pterygoideus dorsalis lateralis; , M. Pterygoideus dorsalis mediahs ; Qmd., M. Ouadrato-mandib
. Bulletin of the British Museum (Natural History). THE MORPHOLOGY OF THE HEAD OF THE HAWFINCH ft. d. m. 379 A. m. p. ft. d. m. I. ft. d. I. Fig. 4. Coccothraustes coccothraustes. a, Diagrammatic view of the right side of the head, eye and eye muscles removed to expose the jaw muscles in the orbit. B, Dia- grammatic dorsal view of the right orbit. A ., M. Adductor mandibulae posterior; E. md., M. Ethmo-mandibularis ; Pst., M. Pseudotemporalis (M. Adductor mandibulae internus) ; , M. Pterygoideus dorsalis lateralis; , M. Pterygoideus dorsalis mediahs ; Qmd., M. Ouadrato-mandibularis ; //, Optic nerve. M. QUADRATO-MANDIBULARIS (Text-fig. 4) The M. Quadrato-mandibularis forms a thin sheet of muscle, almost devoid of tendinous tissue, underlying the Ms. Pseudotemporalis and Adductor mandibulae posterior. It extends from the quadrate to the mesial surface of the processus coronoideus. The muscle arises from both surfaces of the orbital process and as far as the neck of the quadrate where part of the pars profunda of the M. Adductor. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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