MAifVi.AM) (ii:oi,()(;ir,\L ^|■|t^'I•:Y 109 



liiiiiicd uciilis (Iocs not a|)|K';ii- to he pivsciit in tlic .M;ii-yl;iii<l Eocciw. Jiiid 

 the teeth of Galeocerdo rnnhir/ns. iiltliou^di \ci\v iilMiiidiiiit in lln- conv- 

 sponflint; horizons of A'ir^inia and South Carolina, arc likewise wantiiijr 

 in this state. Hi'iiii/iris/ls scnui is another coniiiion form in tiie Carolina 

 Eocene, and also in the Pliocene of the Atlantic Slope extending as far 

 north as Gay Head, ^lassachusctts, hut is apparently unknown in Ihi- 

 Eocene of !Mai'yland and A'irtzinia. 



Genus GALEOCERDO Miillci niul Hciile. 

 The teeth of this genus are serrated on hoth margins, have the pos- 

 terior edge deeply notched, and the apex more or less sharply inclined 

 backward. As already remarked, some sjiecies are very difficult to dis- 

 tinguish from Carcliarias, and in the case of the teeth referred to 

 G. minor by Gihhes, Emmons and Cope, comparisons show that these 

 really belong to species of Carcliarias. 



Galeoceedo latidexs Agassiz. 

 Plate XIV, Fig. 8. 



Galeocerdo latidens Agfassiz, 1843. Poiss. Foss., vol. iii, p. 231, pi. xxvi, fi;:^s. 22, 



23 {? figs. 20, 21). 

 Galeocerdo latidenx GLbbes, 1840. Jour. Acad. Nat. Sci. Pliila., 2iid ser., vol. i, 



p. 192, pi. XXV, tigs. .59-62. 



Description. — ''Teeth broad, mostly low-crowned, the largest meas- 

 uring about .024 cm. across the base. Anterior coronal margin only 

 slightly arched, except near the apex; apex above the posterior notch 

 small, narrow: margin below the posterior notch long, straight and much 

 inclined: root large. Serrations of the coronal margin very prominent." 



This species is not uncommon in the Maryland Miocene, but as yet 

 only a single example has been obtained from the Eocene of this state. 

 Its preservation is not so good as might be desired, and it is rather under 

 the average size attained by this species. 



Occurrence. — Xaxje^ioy Foematiox. Woodstock. 



Collection. — Maryland Geological Survey. 



Genus SPHYRNA Rafmesque. 

 The small teeth belonging to this genus are similar in both Jaws, 

 oblique, with a .slight posterior notch, and margins smooth or serrated. 

 Their resemblance to the teeth of Carcliarias has alreadv been noted. 



