428 
SELA.CHII. 
1854. Sphyrna plana , E. Hebert, M&n. Soc. G6ol. France, [2] vol. v. 
p. 354, pi. xxvii. fig. 9. 
1888. Corax faleatus, A. S. Woodward, Proc. Geol. Assoc, vol. x. 
p. 293 (in part). 
Type. Detached teeth. 
A small species; principal teeth with a much elevated slendei 
crown, notched prominently at the base of the hinder margin, and 
less so upon the anterior margin, thus producing a bioad posteiioi 
denticle and a less distinct anterior denticle. Coronal serrations 
feeble, often absent. 
The present writer has examined microscopical sections of these 
teeth, and confirmed Agassiz's determination of the absence of an 
internal cavity. — 
Form. Sf Loo. Danian : Holland and Belgium. Upper Senonian : 
S.E. England and N. France. 
42987. Two teeth, one being almost symmetrical and erect; Maas¬ 
tricht Beds, Holland. Van Breda Coll . 
44842 a. Almost symmetrical erect tooth ; Maastricht. 
Presented by Benjamin Bright , Esq., 1873. 
42988. Two posterior teeth ; Maastricht. 
P. 2355. Posterior tooth; Maastricht. 
Van Breda Coll. 
Enniskillen Coll. 
28719. Two teeth; Craie phosphatee, Ciply, near Mons, Belgium. 
Purchased. 1853. 
P. 5557. Tooth ; Ciply. B V exchange, 1888. 
P. 5825. Eight teeth ; Poudingue de Malogne, Ciply. 
Presented by it Ions. A. Houzeau de Leliaie , 18S3. 
35904. Imperfect tooth ; Limbourg. Purchased , 18b0. 
35650. Two teeth ; Upper Chalk, Norwich. Bayfield Coll. 
38916. Tooth ; Norwich. Presented by — Hill , Esq., 1862. 
48947, 48956 e. Seventeen teeth, more or less perfect; Norwich. 
Bayfield Coll. 
P. 5812. Four teeth; Norwich. History unknown. 
P. 1208, P. 2354. Two abraded dental crowns, the second figured 
by Agassiz, tom. cit. pi. xxvi. a. fig. 56 ( Corax planus) ; 
Aix—la—Chapelle. Egerton Enniskillen Colls. 
P. 2350 a. Tooth either of this or a closely allied species, larger than 
the typical teeth ; Eocene, Alabama, U .S.A. 
Enniskillen Coll. 
