330 
SELACHII. 
47220 a, 47220 b. Two specimens, shown, of the natural size, in 
PI. XI. figs. 22, 23; Gault, Folkestone. Gardner Coll. 
47220 C, 47220 d. Two smaller teeth, one anterior, one from the 
side of the jaw ; Gault, Folkestone. Gardner Coll. 
39219. Tooth as large as the type specimens, but less elevated and 
referable to a more posterior situation in the jaw : Gault, 
Folkestone. Bowerbank Coll. 
Synechodus sulcatus (Davis). 
1888. Odontaspis sulcata, J. W. Davis, Trans. Doy. Dublin Soc. [2] 
vol. iv. p. 25, pi. v. figs. 11-13. 
1888. Synechodus sulcatus , A. S. Woodward, Geol. Mag. [3] vol. v. 
p. 499. 
Type. Detached teeth ; Colonial Museum, Wellington, New Zea¬ 
land. 
A species known only by the lateral teeth, which are much com¬ 
pressed. The cones are well separated, each having a broad base 
and an elongated slender extremity; and the lower half in all is 
marked by a few widely-spaced vertical wrinkles. 
Form. Sf Loc. Cretaceo-Tertiary (Black Grit Series) : Amuri Bluff, 
Xew Zealand. Qu /x 
P. 2314. Imperfect dental crown. By exchange, 1876. 
Undetermined species of Synechodus are indicated by the follow¬ 
ing teeth:— 
48954. Anterior tooth, measuring 0-008 from side to side, and half 
of a tooth of corresponding size from the middle of the 
ramus of the jaw; Upper Chalk, Norwich. The teeth are 
very suggestive of S. dubrisiensis , but are distinguished by 
the breadth and compression of the lateral denticles. 
Bayfield Coll. 
P. 5846. A still larger anterior tooth, measuring 0-009 from side to 
side, differing from the foregoing in its much greater height 
and the smoothness of the coronal surface; Upper Chalk, 
Norwich. Presented by B. B. Woodward, Esq., 1888. 
48953. Anterior tooth much resembling that of S. recurvus, but 
somewhat larger, and with the lateral cones more di¬ 
vergent ; shown, of the natural size, in PI. XII. fig. 7; 
Upper Chalk, Norwich. Bayfield Coll. 
P. 5847. A less perfect similar tooth; Upper Chalk, Norwich. 
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