<S8 SYSTEMATIC PALEONTOLOGY 



to a sharp point, more or less twisted; anterior margin arched, some- 

 what sinuous, and finely serrated; margin below the posterior notch 

 short, with comparatively small serrations." 



The teeth of this species are quite abundant in the Eocene of South 

 Carolina, Alabama and Virginia, and occur somewhat plentifully in the 

 Miocene of Maryland and adjoining states. The illustration given in 

 Plate XXXII, Fig. 9, is of an average-sized individual. 



Occurrence. — Choptank Forjmation. Greensboro. Calvert For- 

 mation. Charles county near the Patuxent river, Fairhaven, 3 miles 

 south of Chesapeake Beach, Plum Point. 



Collections. — Maryland Geological Survey, Philadelphia Academy of 

 Natural Sciences, Museum of Comparative Zoology. 



Galeocerdo latidens Agassiz. 

 Plate XXXII, Fig. 10. 



Galeocerdo latidens Agassiz, 1843, Poiss. Foss., vol. iii, p. 331, pi. xxvi, figs. 22, 23 



(? figs. 20, 21). 

 Galeocerdo latidens Eastman, 1901, Md. Geol. Survey, Eocene, p. 109, pi. xiv, fig. 8. 



This species is of rare occurrence in the Maryland Tertiary, only a 

 single example being known from the Xanjemoy formation (Eocene) of 

 Woodstock, and scarcely a dozen from the Miocene of Fairhaven and 

 Charles county. The teeth exhibit considerable variation in form, some 

 of them approaching closely to the type of G. adancus except that they 

 are more strongly serrated on the posterior margin {cf. Plate XXXII, 

 Figs. 10, 11). 



Occurrence. — Choptank Formation. Governor Run. Calvert For- 

 mation. Fairhaven, Charles county near the Patuxent river. 



Collections. — Maryland Geological Survey, Philadelphia Academy of 

 Natural Sciences, Museum of Comparative Zoology. 



Galeocerdo aduncus Agassiz. 

 Plate XXXII, Fig. 11. 



Galeocerdo aduncus Agassiz, 1843, Poiss. Foss. vol. iii, p. 231, pi. xxvi, figs. 24-28. 

 Galeocerdo aduncus Gibbes, 1849, Jour. Acad. Nat. Sci. Phila., 2nd sen, vol. 1, p. 191, 

 pi. XXV, figs. 54-.58. 



