pycxodoxtidje. 
251 
An imperfectly defined species, somewhat smaller than the type, 
of nearly similar proportions, bnt apparently differing in its rela¬ 
tively smaller head. Vertebral axis at origin of dorsal fin slightly 
above the middle point between the dorsal and ventral borders of 
the fish. 11 vertical series of scales, each completed at the ventral 
margin with a coarsely serrated ridge-scale. 
Form. Sf Loc. Upper Cretaceous : Island of Lesina, Dalmatia 1 . 
P. 5947. Small specimen 0*115 in length, the hinder portion 
obscured by a thin film of matrix. Purchased , 1889. 
Ccelodus rosthorni, Heckel. 
1856. Ccehdus rosthormi, J. J. Heckel, Denksclir. k. Akad. Wiss., 
math.-naturw. Cl. vol. xi. p. 213, pi. v. 
Type. Hinder two-thirds of fish ; Eosthorn Collection, Klagenfurt. 
An imperfectly defined species, attaining a length of at least 0'5, 
remarkable for its much elongated trunk and the great inter- 
digitating expansion of its neural and haemal arches. Vertebral 
axis at origin of dorsal fin slightly above the middle point between 
the dorsal and ventral borders of the fish. Dorsal fin with 51, and 
anal with 41 rays. 
Form. S)' Loc. Upper Cretaceous : Comen, Istria. 
Hot represented in the Collection. 
Ccelodus grandis (Costa). 
1853. Pycnodus grandis , 0. G. Costa, Atti Accad. Pontan. vol. vii. 
p. 20, pi. iii. figs. 1-3, 5. 
(?) 1853. Pycnodus a chillis, 0. G. Costa, ibid. p. 23, pi. iii. figs. 7-10. 
[Splenial dentition.] 
1856. Ccelodus grandis, J. J. Heckel, Denkschr. k. Akad. Wiss., math.- 
naturw. Cl. vol. xi. p. 203. 
1882. Ccelodus grandis, F. Bassani, ibid. vol. xlv. p. 232. 
Type. Hearly complete fish. 
A small, imperfectly-known, deep-bodied species, the maximum 
depth of the trunk considerably exceeding its length from the 
pectoral arch to the base of the caudal fin; head with opercular 
apparatus occupying about one-quarter of the total length of the 
fish. Vertebral axis at origin of dorsal fin very slightly above the 
1 A fish from the Cretaceous of Mt. S. Agata, near Gradisca, Istria, is also 
described as closely related to this species by F. Bassani, Jakrb. k. k. geol. 
Eeichsanst. vol. xxxiv. (1884), p. 405, pi. ix. fig. 3. 
