. Breviora. 12 BREVIORA No. 367 of which are nonpedicellate; replacement teeth much in evidence (Fig. 7). The palatine arch presents no unusual features. Metapterygoid- quadrate foramen well developed. Hyomandibular well separated from mesopterygoid. Facial bones (Figs. 5-6). Facial bones present no unusual features. Circumorbital series complete. Nasal bone tubular, laminar projections minute. Antorbital slender, struthke. Infra- orbitals six; infraorbitals 2-4 gradually increasing in size over ones preceding them. Infraortibal 1 not enlarged. Infraorbitals 3 and 4 with tubes from postorbital
. Breviora. 12 BREVIORA No. 367 of which are nonpedicellate; replacement teeth much in evidence (Fig. 7). The palatine arch presents no unusual features. Metapterygoid- quadrate foramen well developed. Hyomandibular well separated from mesopterygoid. Facial bones (Figs. 5-6). Facial bones present no unusual features. Circumorbital series complete. Nasal bone tubular, laminar projections minute. Antorbital slender, struthke. Infra- orbitals six; infraorbitals 2-4 gradually increasing in size over ones preceding them. Infraortibal 1 not enlarged. Infraorbitals 3 and 4 with tubes from postorbital branch of cephalic sensory canal system leading to their posterior margin (Fig. 5). Posterior bony margin of gill cover formed largely by sub- opercle; subopercle with well-developed, dorsally-projecting spine at anteroventral end. Preopercle with a slender tubular extension dorsally. Suprapreopercle absent. Visceral arches (Figs. 8-10). Hyoid arch without unusual fea- tures. Branchiostegal rays five (as in Hemiodus, Argonectes), first four articulating with ceratohyal, fifth with epihyal. Proxunal end of fourth where it connects with ceratohyal greatly expanded (see Fig. 9). premaxillary maxillary palatine dentary coronomeckelian bone opercle. subopercle articular Interopercle preopercle Figure 6. Jaws, jaw suspension, and opercular bones of Micromischodus siigillatus (internal view).. 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. , Museum of Comparative Zoology, Harvard University
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