SELACHII. 
37161. Elongated tooth ; L. Chalk, Dover, Kent. Purchased, 1863, 
P. 5879. Much elongated tooth ; Southeram. 
Presented by the Rev. E. A. Illingworth. 
P. 2148. Similar tooth ; Susses. Egerton Coll . 
P. 2752. Imperfect similar tooth; Southeram. Enniskillen Coll. 
P. 5397. Fragments of three similar teeth, associated; Lewes. 
Presented by P. E. Coombe, Esq., 1888. 
P. 5398. A comparatively short much rounded tooth, pertaining 
either to this species or to A. levis ; referred to the latter 
by the present writer in Proc. Geol. Assoc, vol. s. p. 290: 
Lewes. Presented by P. E. Coombe, Esq., 1888. 
The following specimens may pertain either to Acrodus or Ces- 
tracion :— 
22492. Two small teeth with a longitudinal ridge-fold, and the ' 
lateral markings semi-reticulate, of the form named Aero- i P7 
dus semirugosus, T. Plieninger, Wiirtt. Jahresh. vol. iii. / 
(1847), p. 227, pi. ii. tig. 17; Corallian, Schnaitheim, i 
Wiirtemberg. Purchased, 1848. 
The following species have also been founded upon detached teeth, 
but there are no examples in the Collection :— 
Acrodus a ffinis, A. E. Peuss, 'V erstein. bolim. Kreideform. pt. i. 
(1845), p. 1, pi. ii. tigs. 3, 4; A. Fritsch, Kept. u. Fische 
bohm. Kreideform. 1878, p. 15, tig. 37; H. B. Geinitz, 
Palaeontogr. vol. xx. pt. ii. (1875), p. 212.— Planerkalk ; 
Bohemia and Saxony. 
Acrodus angustus, C. G. Giebel, Fauna d. Vorw., Fische (1848), 
p. 327.—Lias; Quedlinburg. 
Acrodus emmonsi, J. Leidy, Proc. Acad. Nat. Sci. Philad. 1872, 
p. 163. “Acrodus, Emmons, N. Carolina Geol. Surv. 
185 L p. 244, tig. 97.—Miocene ; North Carolina ” (?). 
04662 ■Acrodus flemingianus, L. G. de Koninck, Quart. Journ. Geol. Soc. 
voL xix - (1863), p. 17, pi. viii. tig. 5.—Productus Lime¬ 
stone; Salt Range, Punjab, India. 
Acrodus humilis, J. Leidy, Proc. Acad. Nat. Sci. Philad. 1872, 
p. 163; Ext. Vert. Fauna West. Territ. (U.S. Geol. Surv. 
Territ. vol. i. 1873), p. 301, pi. xxxvii. tig. 5.—Cre¬ 
taceous ; New Jersey. 
