428 
SELA.CHII. 
1854. Sphyrna plana, E. Hubert, Mdm. Soc. G4ol. France, [2] vol. v. 
p. .854, pi. xxvii. fig. !). 
1888. Corax falcalus, A. S. Woodward, Pvoc. Geol. Assoc, vol. x. 
p. 29.8 (in part). 
Type. Detached teeth. 
A small species; principal teeth with a much elevated slender 
crown, notched prominently at the base of the hinder margin, and 
less so upon the anterior margin, thus j)roducing a broad posterior 
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. ^ Loc. Danian : Holland and Belgium. . Upper Senonian : 
S.E. England and N. France. 
42987. Two teeth, one being almost symmetrical and erect ; Maas- 
tricht Bods, Holland. Van Breda Coll. 
44842 a. Almost symmetrical erect tooth ; Maastricht. 
Presented by Benjamin Bright, Esq., 1873 . 
42986. Two posterior teeth ; Maastricht. Van Breda Coll. 
P.2355. Posterior tooth ; Maastricht. Ennislnllen Coll. 
28719. Two teeth ; Craie phosphatee, Ciply, near Mens, Belgium. 
Purchased, 18 . 53 . 
P. 5557. Tooth ; Ciply. By exchange, 1888. 
■P. 5826. Eight teeth ; Poudingue do Malogne, Ciply. 
Presented by Mans. A. J/ouzeau de Lehaie, 1888 . 
35904. Imperfect tooth ; Limbourg. Purchased, 1860 . 
35650. Two teeth ; Upper Chalk, Norwich. Bayfield Coll. 
36916. Tooth ; Norwich. Presented by — Hill, Esq., 1862 . 
48947, 48956 e. Seventeen teeth, more or less perfect ; Norwich. 
Baifield Coll. 
P. 5812. F our teeth ; Norwich. IHstory unlcnown. 
P. 1208, P. 2354. Two abraded dental crowns, the second figured 
by Agassiz, tom. cit. pi. xxvi. a. fig. 50 {Oorax qjlanus) ; 
Aix-la-Chapello. Egerton ^ Ennislcdlen Colls. 
P. 2350 a. Tooth either of this or a closely allied species, larger than 
the typical teeth ; Eocene, Alabama, U.S.A. 
En n isk'illen Coll. 
