. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Relationships of Stomiiforms • Fink and Weitzman 35 rostrodermethmoid vomer fronta. supraethmoid rftV-ethmoid cartilage ateral ethmoid outline of myodome bone Figure 2. Ethmoid region of D. taenia (USNM 206614; mm SL), dorsal view; right portion of rostrodermethmoid removed. olfactorium advehens, through which the olfactory nerve passes. The posterior sur- face of the ethmoid cartilage has a single, medial deep conical recess, the anterior myodome, in which the superior oblique eye muscles have their point of or
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Relationships of Stomiiforms • Fink and Weitzman 35 rostrodermethmoid vomer fronta. supraethmoid rftV-ethmoid cartilage ateral ethmoid outline of myodome bone Figure 2. Ethmoid region of D. taenia (USNM 206614; mm SL), dorsal view; right portion of rostrodermethmoid removed. olfactorium advehens, through which the olfactory nerve passes. The posterior sur- face of the ethmoid cartilage has a single, medial deep conical recess, the anterior myodome, in which the superior oblique eye muscles have their point of origin. Posterior to the lamina orbitonasalis, the cartilage is continuous with the trabecu- lum communis (Fig. 5) ventrally and the orbital cartilages dorsally. The trabecu- lum communis extends posteriorly from the ethmoid cartilage and lies just dorsal to the parasphenoid bone. A membra- neous interorbital septum extends from the trabeculum communis to the frontal bones above the orbit. The ethmoid ossifications include a single supraethmoid, a single rostroder- methmoid, a single ventral ethmoid, paired lateral ethmoids, and a single an- terior myodome bone. The supraethmoid is a perichondral ossification on the dor- sal cartilage surface. Posteriorly, the su- praethmoid has a slightly convex border, and its lateral edges meet the postero- medial borders of the olfactory recesses. Anteriorly, the supraethmoid border is more convex than the posterior border, and its lateral edges meet the anterome- dial border of the olfactory recesses. The supraethmoid ossification also covers the medial surface of the olfactory recess as the capsular portion of the supraethmoid. This capsular portion, primarily endo- chondral, is an approximately cone- shaped object with its apex near the dorsal midline. Laterally, the capsular portion is highly fenestrated. (In some more specialized stomiiforms and in the osmerid Spirinchus, the capsular portion of the supraethmoid is separate from the do
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