378 SELACHII. 
4490, 4494, 4496, 4499-4517, 4519, 4520, 4323, 4525, 4526, 
4528-4534, 4537, 4541-4548, 4551, 4556-4559. One 
tooth and forty-six dental crowns; Chalk, Sussex. 
Mantell Coll. 
25759, 25787—89, 25799, 25946 a. One complete, and twelve more 
or less imperfect teeth, the first figured by Dixon, op. 
cit. ; Chalk, Sussex. Dixon Coll. 
25799, 25767. Three teeth figured by Dixon (op. cit. pi. xxx. figs.,2j6, 
19, pi. xxxi. fig. 18) under the name of Lamna acuminata, 
the figure of the second also given by Agassiz {tom. cit. 
pi. xxxvii. a. fig. 54); Chalk, Sussex. Dixon Coll. 
25923 a. Four imperfect associated teeth ; Chalk, Sussex. 
Dixon Coll. 
41344. Five imperfect large teeth ; Chalk, Sussex. 
Purchased , 1869. 
43129. Small lateral tooth; Chalk, Sussex. Wetherell Coll. 
49958. Large lateral tooth ; Chalk, Lewes. Capron Coll. 
P.1263-4. Three anterior associated teeth, one showing a faint 
indication of a denticle: also three detached teeth: 
Chalk, Sussex. Ecjerton Coll. 
P. 1265. Five small dental crowns, probably of this species ; Chalk, 
Sussex. Egerton Coll. 
P. 5403. Broad tooth, with indications of lateral denticles ; Chalk, 
Sussex. Presented by P. E. Coombe , Esq., 1888. 
32346-7, 39434. Group of about fifty-seven naturally associated 
teeth, with remains of vertebras ; Chalk, Grays, Essex. 
Thirteen of the teeth are shown, of the natural size, in 
PI. XVII. figs. 9-21. 
Purchased , 1857, and Bowerbank Coll. 
20289. Small tooth ; Chalk, Greenhithe, Kent. Purchased , 1846. 
23158 a. Two imperfect teeth; Chalk, Kent. Purchased , 1849. 
39056. Lateral tooth ; Chalk, Kent. Bowerbank Coll. 
40546. Tooth; Chalk, Kent. 
Purchased, 1867. 
43095. Lateral tooth; Chalk, Gravesend, Kent. Wetherell Coll. 
44585. Two small lateral teeth; Gravesend. Purchased, 1873. 
44840. Two teeth ; English Chalk. 
Presented by Benjamin Bright , Esq., 1873. 
