438 
SEIACTIII. 
Type. Detached teeth. 
A species of moderate size, the teeth comparatively robust and 
broad, the coronal margin often feebly crimped upon the basal ex- 
tensions. 
Form. ^ Loc. Eocene: South Carolina and Alabama, U.S.A. 
28103. About seventy-five teeth ; South Carolina. Ptirchased, 1852. 
47006. Two teeth ; South Carolina. 1876. 
P. 5747. Seven tooth ; South Carolina. History unknown. 
P. 1220. Six teeth ; South Carolina. Eyerton Coll. 
P. 1220 a. Eleven teeth ; Clarke’s Co., Alabama. Eyerton Coll. 
P. 2338. Twenty teeth ; Clarke’s Co., Alabama. Enniskillen Coll. 
The following specimen may also be referred to this subgenus : — 
36330. Largo tooth, measuring 0*02 across the base, having the 
lateral extensions of the crown faintly plicated ; named 
Lamna euryhathrodon, C. C. Blake, The Geologist, vol. v. 
(1862), p. 316 ; Miocene, Aspinwall, Darien. 
Purchased, 1862. 
The following species have also been founded upon detached 
teeth, but there are no examples in the Collection : — 
Carcliarias (Aprionodon) acanthodon: Oaleocerdo acanthodon, H. 
Le lion, Prelim. Mem. Poiss. Tort. Bolg. 1871, p. 0, wood- 
cut. — Pliocene ; Belgium. 
(?) Carcharias {Aprionodon) basisulcatus : O.vyrhina hasisuleata,Yj. 
Sismonda, Mem. 11. Accad. Sci. Torino, [2J vol. x. (1849), 
p. 45, pi. ii. fig. 40 ; 0. 0. Costa, Paloont. llogno Napoli, 
pt. ii. (1854-56), p. 83, pi. vii. %s. 19, 20, 25 {non 
fig. 1 8). — Miocene ; Turin. 
Carcharias {Aprionodon) brevis, J. Probst, Wiirtt. .Tahresh. 
vol. xxxiv. (1878), p. 122, pi. i. fig. 4.— Molasse ; Bal- 
tringen, Wurtemberg. 
Carcharias {Aprionodon) frequens, hV. Dames, Sitzungsb. k. preuss. 
Akad. Wiss. 1883, pt. i. p. 143, pi. iii. fig. 7 a-p. — Lower 
Tertiary ; Birkot-el-Qurfin, Egypt. 
Carcharias {Aprionodon) stellatus, J. Probst, tom. cit. p. 121, pi. i. 
— Molasse; Baltringon. 
iv. HYPOPBION. 
The upper teeth of this subgenus are scarcely distinguishable 
from those of Galeiis, and extinct species arc thus difficult of deter- 
