CASCHAKIIDjE. 
443 
Genus GALEOCERDO, Miiller & Henlo. 
[Syst. liesehreib. Plagiostom. 1841, p. 59.] 
Syn. Gdleodes, 3. 3. Ileckel, Sitzungsb. math.-nat. Cl. k. .\kad. Wias. 
Wien, vol. xi. (1854), p. 324. 
Snout short ; mouth crescent-shaped, the labieJ groove incon- 
spicuous. Spiracles minute. A pit on the tail, above and below, 
at the commencement of the caudal fin ; the latter with a double 
notch. Teeth subequal in both jaws, oblique, serrated on both 
margins, with a deep notch posteriorly. 
The fossil teeth of this genus, l>eing found detached, can often be 
only doubtfully separated from those of certain species of Car- 
rharim. 
Galeocerdo contortus, Gibbes. 
1849. Galeocerdo contortus, II. W. Gibbes, Joum. Acad. Nat. Sci. 
Philad. [2] vol. i. p. 193, pi. xxv. figs. 71-74. 
Type. Detached teeth. 
A species of moderate size. Teeth veiy robust, with elevated 
crown ; the apex above the posterior notch elongated, produced 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. 
Form. ^ Lor. Eocene : South Carolina and Alabama, TJ.S.A. 
Miocene : Virginia and Maryland, U.S.A. 
28100. Thirty-three teeth, some imperfect ; Eocene, South Caro- 
lina. Purchased, 1852. 
47001. Tooth; South Carolina. Purchased, 
P. 1213. Two teeth ; South Carolina. EgerUm Coll. 
P. 2347. Three teeth ; probably from South Carolina. 
Enniskillen Coll. 
P. 4098. Six teeth ; Charleston, South Carolina. 
By exchange, 1883. 
P. 5748. Six teeth ; probably from South Carolina. 
35610. Five teeth, more or less imperfect ; Eocene, Alabama. 
PrestrUed ly Prof. J. W. Mallet, 1859. 
P. 2349. Tooth ; Alabama. Enniskillen Coll. 
P. 2348. Tooth ; Miocene, Maryland. Enniskillen Coll. 
41333. Tooth ; Miocene, Marj land. Purchased, 1869. 
