CESTBACIOSTIDa:. 
277 
26027. Tooth with imperfect crown, but complete root ; Tilgate 
Forest. Dixon Coll. 
P. 4919 a. Three imperfect smaller teeth, with higher median cone ; 
Hastings. Dawson Coll. 
P. 4680. An abraded tooth ; Lower Greensand, Isle of Wight. 
Presented hij C. Westendarp, Esq., 1884. 
The following specimens may indicate late Cretaceous species of 
Hybodus, but the determination in each case is uncertain : — 
45311. Group of eight naturally associated teeth and fragments, in 
form and proportions much resembling the Ehsctic teeth 
named Hybodus cloacinus; English Chalk. 
Purchased, 1872. 
P. 5878. iledian portion of a very robust large tooth, the principal 
cone measuring O'OKJ in height, and O'Ol in breadth at 
the base, and the coronal surface almost smooth ; Chalk, 
Knapton, Yorkshire. Bean Coll. 
The following species have also been founded upon detached teeth, 
but there are no examples in the Collection : — 
Hybodus auavslus, L. Agassiz, Poiss. Foss. vol. iii. (1843), p. 191, 
pi. xxiv. 6gs. 9, 1.5 ; (?) H. von Meyer, Palteontogr. vol. i. 
(1849), p. 227, pi. xxviii. tig. 45 ; H. Eck, Form. bunt. 
Sandst. u. Muschclk. Oberschlesien (1865), p. 119 (non 
Gervais, Zool. et Pal. Fran^., Poiss. p. 12, pi. Ixxvii. fig. 6). 
— Muschelkalk ; E. France, (?)and Silesia. 
Hybodus attenuatus, H. von Meyer and T. Plieniuger, Beitr. Pal. 
AViirltembergs (1844), p. 110, pi. xii. figs. 33, 34, 72, 76. 
H. bimaryinntus, Aleyer & Plieninger, op. cit. p. 114, 
pi. xii. figs. 27, 53, 60, 84. — Rhaitic ; Stuttgart. 
Hybodus cristatus, A. E. lleuss, Verstein. bohm. Kreideform. pt. i. 
( 1 845), p. 2, j)l. ii. fig. 20. — L. Planerkalk ; Bohemia. 
Hybodus injlatus, L. Agassiz, tom. r-it. p. 186, pi. xxiii. fig. 42. 
— Inferior Oolite; Caen, Yormandy. 
Hybodus Iceuperianm, T. C. Winkler, Archiv. Mus. Teyler, vol. v. 
(1880), p. 116, pi. vi. figs. 15, 16. — Keuper; Wurzburg. 
Hybodus mahrothi, II. B. Geiniiz, Ilyas (1861), p. 27, pi. iv. 
fig. 4. — Kupferschiefer ; Gera, Saxony. 
Hybodus non-striatus, T, C. Winkler, tom. cit. livr. 2, p. 121, 
pi. vi. figs. 17, 18. — Keuper ; Wurzburg. 
Hybodus orthoconus, Meyer & Plieninger, op. cit. pp. Ill, 119, 
pi. xii. figs. 77, 85, 87, 89. — Rhaitic ; Stuttgart. 
Hybodus pusillus, W. Duuker, Xordd. Wealdenbild. (1846), p. 68, 
pi, XV. fig. 23. — AVcaldcn ; X. (iermany. 
