. Bulletin of the Department of Geology. Geology. 108 University of California Publications. [Geology forms of the teeth, it is not easy to determine species in this genus. This species is distinguished by the flatness and breadth of the crown of its teeth. The inner edge of the tooth is quite flat, the outer or front not much convex. We refer to Isurus planus, about 200 specimens of various sizes, but all relatively short and broad. These are from Barker Ranch, in Kern County, and from near Oil City. Some are nearly erect, and narrowly Fig. 9. Isurus planus (Agassiz). Miocene of
. Bulletin of the Department of Geology. Geology. 108 University of California Publications. [Geology forms of the teeth, it is not easy to determine species in this genus. This species is distinguished by the flatness and breadth of the crown of its teeth. The inner edge of the tooth is quite flat, the outer or front not much convex. We refer to Isurus planus, about 200 specimens of various sizes, but all relatively short and broad. These are from Barker Ranch, in Kern County, and from near Oil City. Some are nearly erect, and narrowly Fig. 9. Isurus planus (Agassiz). Miocene of Kern County, California. Some which we suppose to be outer teeth are very much more curved, and have a marked reentrant angle. These would seem at first sight to indicate a distinct species, but we are convinced that both straight and hooked teeth came from the same shark. The root in Isurus planus is very broad, and its basal margin is but little curved, usually not crescent-shaped. The largest teeth of this type are one and one-half to two inches in length. The largest specimen of all, two and one-fifth inches high, was ob-. 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 University of California, Berkeley. Dept. of Geology. Berkeley : The University Press
Size: 1806px × 1384px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectgeology, bookyear1902
