. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Anatomy of Eocaecilia micropodia •Jenkins, Walsh, and Carroll 353. Figure 46. The jaw muscles in Ichthyophis glutinosus. (A) Lateral view of superficial muscles. (B, C) Lateral view of deep muscles, with the cranial vault resected (oblique hatching) to show origins within the adductor fossa. The muscles in plate B lie lateral to those in plate C. (D) Dorsal view of the adductor muscles with the cranial roof resected. (E) Isolated adductor muscles in posterior view. (AMP) occupies the most posterior por- tion
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Anatomy of Eocaecilia micropodia •Jenkins, Walsh, and Carroll 353. Figure 46. The jaw muscles in Ichthyophis glutinosus. (A) Lateral view of superficial muscles. (B, C) Lateral view of deep muscles, with the cranial vault resected (oblique hatching) to show origins within the adductor fossa. The muscles in plate B lie lateral to those in plate C. (D) Dorsal view of the adductor muscles with the cranial roof resected. (E) Isolated adductor muscles in posterior view. (AMP) occupies the most posterior por- tion of the adductor chamber and is sep- arated from the AME by V3 (Fig. 46B, D). The AMP originates from two areas of the quadrate: the lateral surface of the ptery- goid ramus and the medial surface of the palatine ramus. The insertion is within the mandibular fossa of the pseudoangular, which also transmits the mandibular ramus of V3 and the mandibular artery. In the upper portion of the adductor chamber, the adductor mandibulae inter- nus (AMI) is separated from the AME by branches of V2, and more ventrally, by con- nective tissue (Fig. 46C). The AMI origi- nates somewhat ventral to the AME, from a more medial position on the underside of the skull roof. Most of the AMI joins the AME to share the same insertion in the mandibular fossa. A slip of the AMI (the levator quadrati, Fig. 46E), which arises from a more inferior position within the adductor chamber, is separated from the AMI by a large blood vessel accom- panying the deep branch of V: and con- nective tissue. The slip converges to its at- tachment in a pit at the top of the ptery- goid ramus of the 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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