. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Species o/'Saurocephalus. 481 nature of the remains * (although he confounded them with, an entirely distinct species); and his conclusions were con- firmed by Kichard Owen f. Dr. Leidy J corrected Agassiz's errors, and gave more accurate descriptions and figures of the maxillary than had been furnished by Harlan. No remains of Harlan's species, other than the maxillary referred to, have hitherto been described. Dr. E. W. Hil- gard § has reported the species as occurring in th
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Species o/'Saurocephalus. 481 nature of the remains * (although he confounded them with, an entirely distinct species); and his conclusions were con- firmed by Kichard Owen f. Dr. Leidy J corrected Agassiz's errors, and gave more accurate descriptions and figures of the maxillary than had been furnished by Harlan. No remains of Harlan's species, other than the maxillary referred to, have hitherto been described. Dr. E. W. Hil- gard § has reported the species as occurring in the Vicksburg group of the Eocene, but the identification was undoubtedly erroneous. Dr. William Spillman || has also included this species in his list of fossils belonging to the Tombigbee greensand of the Cretaceous at Columbus, Miss. Although this identification is less improbable than the former, we have nothing to confirm its correctness. Notwithstanding the scantiness of the material belonging to the type species, our knowledge of the genus Sauro- cephalus has been greatly increased through the descriptions of closely related and more perfectly preserved species. For this additional knowledge we are indebted to Cope and Newton, and more recently to Alban Stewart, of the Uni- versity of Kansas. For some time I have had in my possession some remains which on examination prove, in my judgment, to belong to Harlan's species. This material was collected for me in the region of Butte Creek canon, south of Wallace, Kan. ; and the horizon is undoubtedly that of the Niobrara Creta- ceous. My material consists of both the mandibles, the right maxilla, the pterygo-palatine arch, and a few other bones. The maxillary (fig. 1) is rather short and deep. The Fio- portion belonging in front of the palatine condyle is missing; but the condyle itself is present. The alveolar border is * Poiss. Foss. v. p. 102. t Odontography, p. 130, pi. 55. \ Trans. Amer. Philos. Soc. 1857, xi. pp. 91-9
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