. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. FIRST RECORD OF THE EXTINCT SHARK. SQUALICORAX FALCATUS. FROM CALIFORNIA The upper Cretaceous shark fauna in California has received little attention. Jordan and Hannibal (Bull. So. Calif. Acad. Sci., 22,1923) listed and discussed four questionable species, based on fragmentary teeth, from the upper Cretaceous Chico formation, near Martinez, California. Camp (Mem. Univ. Calif., 13, 1942) mentioned small sharks' teeth from the Garzas sand member of the Moreno forma- tion. Professor William J. M
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. FIRST RECORD OF THE EXTINCT SHARK. SQUALICORAX FALCATUS. FROM CALIFORNIA The upper Cretaceous shark fauna in California has received little attention. Jordan and Hannibal (Bull. So. Calif. Acad. Sci., 22,1923) listed and discussed four questionable species, based on fragmentary teeth, from the upper Cretaceous Chico formation, near Martinez, California. Camp (Mem. Univ. Calif., 13, 1942) mentioned small sharks' teeth from the Garzas sand member of the Moreno forma- tion. Professor William J. Morris, of Occidental College, recently gave the Los Angeles County Museum a single sharks' tooth (LACM 6459). This specimen (Fig. 1) was collected at LACM locality 1895,. Figure 1. Squalicorax falcatus from the Holz silt member of the Ladd formation, upper Cretaceous, southern California. Eight times natural size. near the town of Silverado, California, in the Santa Ana Mountains. The tooth is imbedded in a grey fossiliferous siltstone, with a pelecy- pod (Isocardia sp.), other shell fragments, and bits of altered wood. The rock containing the tooth was taken from the Holz silt member of the Ladd formation; which is of Senonian age (Popenoe, Calif. Div. Min. Bull. 170, 1954). Only the crown of the tooth is present, yet the shape and serra- tions are clear enough to identify it as a lateral tooth of Squalicorax 42. 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 Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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