CAECHAKHDiE. 
439 
mination. The following specimens, however, probably represent 
an unknown Eocene form : — 
P. 4104 a. Three small teeth, one showing three broad posterior 
denticulations ; Woolwich and Heading Bods, Chislehurst, 
Kent. Presented by Sydney C. Cockerell, Esq., 1883. 
The following species has also been founded upon detached teeth, 
but there are no examples in the Collection : — 
Carcharicts (Hypoprxon) sinyularis, J. Probst, Wiirtt. Jahresh. 
vol. xxxiv. (1878), p. 123, pi. i. figs. 5, 6. — ilolasse; 
Baltringen. 
Another tooth, from the Tertiary of Xgembak, Java, has been 
doubtfully assigned to this subgenus by K. Martin, Samml. geol. 
Reichs-Mus. Leiden, [1] vol. iii. (1883), p. 30, pi. ii. fig. 24. 
V. PRIONODOK. 
Carcharias (Prionodon) egertoni (Agassiz). 
1837. Carcharias minor, L. Agassiz in Egerton’s List of Fossil Fishes. 
1843. Corax egertoni, L. Agassiz, Poiss. Foss. vol. iii. p. 228, pi. xixvi. 
figs. 6, 7. 
1847. Glyphis mhulata, R. W. Gibbes, Proc. Acad. Nat ScL Philad. 
p. 208 . 
1849. Galeocerdo egertoni, R. W. Gibbes, Jonm. Acad. Nat Sci. 
Philad. [2] vol. i. p. 192, pi. xiv. figs. 68-69. 
1849. Glyphis sahdata, R. W. Gibbes, torn. cit. p. 194, pL xxv. figs. 
86,87. 
Type. Detached teeth ; British Museum. 
Upper teeth broad, triangular, prominently serrated, both margins 
slightly concave. Lower teeth probably narrower than the upper, 
robust, and prominently serrated. 
Form. ^ hoc. Eocene : South Carolina, U.S.A. Miocene : Mary- 
land, U.S.A. 
P. 2351. T}-pe specimen, figured by Agassiz, tom. cit. pi. xx.xvi. 
fig. 6; Maryland. Enniskillen Cull. 
P. 494. Larger tooth, figured ibid. fig. 7 ; Marjland. Eyerton Coll. 
P. 2352. Still larger tooth ; Maryland. Enniskillen Coll. 
41331. Two smaU teeth, one relatively narrow; Maryland. 
Purchased, 1869. 
P. 5746. Three teeth ; probably from Marjdand or South Carolina. 
47002. Tooth; Phosphate Beds, South Carolina. Ihirchased, 1876. 
