. Bulletin of the Department of Geology. Geology. 98 University of California Publications. [Geology this paper are open to some question, the degree of which is scarcely fully indicated by the query marks used by the author. Family HYBODONTID^E. Genus Hybodus Agassiz. 1. Hybodus shastensis Wemple, Bull. Dept. Geol., Vol. V, p. 73. Three small teeth of a species of Hybodus from the upper Triassie of the Shasta region at the locality known as Bear Cove, in the Museum of the University of California. One of these, No. 10,255, has been made the type of a species called Hybodus shastensis, by Miss
. Bulletin of the Department of Geology. Geology. 98 University of California Publications. [Geology this paper are open to some question, the degree of which is scarcely fully indicated by the query marks used by the author. Family HYBODONTID^E. Genus Hybodus Agassiz. 1. Hybodus shastensis Wemple, Bull. Dept. Geol., Vol. V, p. 73. Three small teeth of a species of Hybodus from the upper Triassie of the Shasta region at the locality known as Bear Cove, in the Museum of the University of California. One of these, No. 10,255, has been made the type of a species called Hybodus shastensis, by Miss Edna M. Wemple. This specimen has a con- ical crown, rising from a broad lunate root, of which the breadth is twice the height of the crown. The crown is rather pointed, nearly erect, and on one side of the base are two much smaller cusps well separated from the large one with a slight rounded denticle between. Two similar cusps exist on the other side, according to Miss Wemple, but Fig. 1. Hybodus shastensis Wemple. they are more or less obscured in the speci- Upper Triassie, Shasta mm whk-h is partly imbedded in hard, County, California. Type specimen. black calcareous rock. The whole crown of the tooth is striated, rather coarsely when we consider the size of the tooth. This species is certainly a Hybodus and it is allied to the European Hybodus grossiconus of Ag'assiz. The following description is from Miss Wemple's manuscript: "Type, one detached tooth. No. 10,255, Univ. Cal. Col. Vert. Palae. From the Upper Triassie at the west end of Bear Cove, Shasta County, California. "The crown supports a high, robust, principal cone with a broad base. There are five lateral denticles. The upper portion of the principal cone is rather sharply narrowed. The lateral denticles, two on one side and three on the other, all are short and robust with narrowed tips. "The sides of the principal cone and all of the denticles are cut into numerous strongly marked ridges. The cro
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