448 
SELACniI. 
fiahocerdo hnisshmis, E. D. Cope, Proc. Acad. Nat. Sci. Philad. 
18G7, p. 141. — Miocene; United States. 
(?) Oaleocerdo marehemw, T. C. Winkler, Archiv. Mus. Teylor, 
vol. iv. (1870), p. 10, pi. i. figs. 10, 11, 12.— Heorsian 
Beds ; Belgium. (? Prionodon.) 
Oaleocerdo priscus (Zigno), E. Bassani, Bond. 11. Aeoad. Sci. Eis. 
e Matem. 1888, p. 375 : Oaleodes jyriscus, J. J. Hockcl, 
Sitmngsl). math.-nat. Cl. k. Akad. Wiss. Wien, vol. xi. 
(1854), p. 324. — Upper Eocene ; Chiavon, Vicontin, 
Italy. 
Oaleocerdo productua, L. Agassiz, Amor. Journ. Sci. [2] vol. xxi. 
(1850), p. 273. — Tertiary ; Ocoya Creek, California. 
Oaleocerdo suhlcevis, G. von Munster, Beitr. Petrofakt. vii. (1840), 
p. 20 : Oaletis sublcevis, G. von Munster, op. cit. v. (1842), 
p. 00. — Miocene ; Vienna Basin. 
Oaleocerdo vincenti, A. Daimerics, Ann. Soc. Boy. Malacol. Beige, 
Proc.-Verb., Juno 1888, p. liv (name only). — Heorsian 
Beds ; Belgium. 
Eossil vertebrae of Oaleocerdo have boon described by C. Hasse, 
Natiirl. Syst. Elasmobr., Besond. Tbcil (1882). Some resembling 
those of the existing O. iigrinus are recorded from the Molassc of 
Baltringen, Wurtomberg (p. 200, pi. xxxvi. fig. 17), and the Crag 
of Antwerp (p. 200, pi. xxxvi. fig. 18) ; others resembling those of 
the existing 0. arcticus are recorded from the Swiss Molasso (p. 202, 
pi. xxxvii. figs. 25, 20), and from the Miocene of Germany and 
Erance (p. 202, pi. xxxvii. figs. 27-32). Vertebra) from the Sam- 
land Eocene are also described by E. Nootling, loc. cit. p. 99, pi. ix. 
figs. 0-10. 
Genus HEMIPRISTIS, Agassiz. 
[Poiss. Eoss. vol. iii. 1843, p. 237.] 
Syn. Dirrhkodon, 0. B. Khmzingor, Verhandl. k. k. zool.-bot. Gesoll. 
Wien, vol. xxi. 1871, p. 004. 
Principal teeth elevated and triangular, more or less curved or 
inclined backwards, with both coronal margins coarsely serrated, 
except towards the apex ; root well-divided into two divergent 
branches. Upper tooth relatively largo, broad, and flat ; anterior 
lower teeth slender, subulate, inwardly curved, and destitute of 
denticulations or with one or two minute points at the base. 
This genus was originally founded by Agassiz upon fossil teeth 
from the Molasso of Wiirtomberg, but a living species of the fish 
{II. elowjatus) has subsequently been discovered in the lied Sea. 
