. The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 105 Superfieial to this ventral region in tlie rays, arising from the fascia of the ventral longitndinal nmscle (the coraeomandihnlaris), is a depressor rostri {, fig. 107). This is inserted far forward between the end of the propter- ygium and the tip of the rostrum {Raja). It has a balancing effect on the levator rostri (see fig. 105, ) previously described. Deeper Muscles of Pharynx The interbranchials of more specialized Elasmobranchs are usually more completely separated from the constrictors into distinct bundles

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. The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 105 Superfieial to this ventral region in tlie rays, arising from the fascia of the ventral longitndinal nmscle (the coraeomandihnlaris), is a depressor rostri {, fig. 107). This is inserted far forward between the end of the propter- ygium and the tip of the rostrum {Raja). It has a balancing effect on the levator rostri (see fig. 105, ) previously described. Deeper Muscles of Pharynx The interbranchials of more specialized Elasmobranchs are usually more completely separated from the constrictors into distinct bundles than are 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 Daniel, J. Frank (John Franklin), 1873-1942. Berkeley,Calif. , University of California press

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