. Breviora. 1994 COCHLEOSA URUS FLORENSIS FROM NOVA SCOTIA 7. Figure 1. Cochleosaurusflorensis Rieppel. Reconstruction of skull based large- ly on MCZ 4342 in A) dorsal view and B) ventral view. of the premaxilla. Similar ridges are seen in the eryopoid tem- nospondyls Zatrachys (Langston, 1953), but unlike in the latter a deep longitudinal trough, nearly devoid of sculpturing, runs up the middle of the central depression, gradually becoming broader and more shallow as it passes anteriorly between the orbits onto the snout, where it terminates as an expansive, shallow depression between and an
. Breviora. 1994 COCHLEOSA URUS FLORENSIS FROM NOVA SCOTIA 7. Figure 1. Cochleosaurusflorensis Rieppel. Reconstruction of skull based large- ly on MCZ 4342 in A) dorsal view and B) ventral view. of the premaxilla. Similar ridges are seen in the eryopoid tem- nospondyls Zatrachys (Langston, 1953), but unlike in the latter a deep longitudinal trough, nearly devoid of sculpturing, runs up the middle of the central depression, gradually becoming broader and more shallow as it passes anteriorly between the orbits onto the snout, where it terminates as an expansive, shallow depression between and anterior to the external nares. The lacrimal bears a low but distinct rounded ridge that passes anteroventrally across its surface. Anteromedial to the ridge, its concave surface bears only muted ornamentation, as in Chenoprosopus but in contrast to C. bohemicus, where no difference in texture occurs (personal observation). Chenoprosopus shows similar, sparsely ornamented depressions on the snout, but apparently not in the postorbital region (Langston, 1953). The well-developed nasals equal the frontals in midsagittal length, but as in Chenoprosopus, the unusually long antorbital region is primarily formed by the remarkably large premaxillae,. 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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