250 
ACTLNOPTERYGII. 
supplemented within by a small row, and all the outer teeth 
showing frequent tendency to irregular subdivision. Neural and 
haemal arches of axial skeleton of trunk not expanding sufficiently 
to encircle the notochord. Pin-rays robust, closely articulated, and 
much divided distally. Pelvic fins present; dorsal and anal fins 
high and acuminate in front, low and fringe-like behind, the former 
occupying at least the hinder half of the back and the latter some¬ 
what shorter, arising more posteriorly ; caudal fin deeply forked, 
with a convexity in the middle. Scales ornamented with reticulating 
rugse and punctations, and occupying only the anterior half of the 
trunk in advance of the median fins. 
Ccelodus saturnus, Heckel. 
1856. Ccelodus saturnus, J. J. Heckel, Denkschr. k. Akad. Wiss., 
matk.-naturw. Cl. vol. xi. p. 207, pis. iii., iv. 
1863. Ccelodus saturnus, R. Kner, Sitzungsb. k. Akad. Wiss., math.- 
naturw. Cl. vol. xlviii. pt. i. p. 138. 
1867. Ccelodus saturnus, R. Kner, ibid. vol. lvi. pt. i. p. 198. 
Type. Nearly complete fish. 
The type species, attaining a length of about 0*5. Maximum 
depth of the trunk equalling about one-half, and length of head 
with opercular apparatus one-quarter of the total length of the fish. 
Vertebral axis at origin of dorsal fin midway between the dorsal 
and ventral borders of the fish. Teeth of median series on the 
vomer about twice as broad as long, those of the first lateral series 
little elongated and obliquely set, those of the outer series smaller 
and round or antero-posteriorly elongated. Teeth of the principal 
(inner) series on the splenial bone attaining a breadth about five 
times as great as their length, all nearly destitute of apical indent; 
those of the next outer series half as large, and about three times 
as broad as long : those of the outermost series comparatively small 
and round. Dorsal fin with 65 rays, occupying more than half of 
the back ; anal fin with 48 rays arising more posteriorly. 14-15 
vertical series of scales. 
Form. Sf Log. Cretaceous : Goriansk, Istria. r 
Not represented in the Collection. 
Ccelodus suillus, Heckel. 
1856. Ccelodus suillus, J. J. Heckel, Denkschr. k. Akad. Wiss., matk.- 
naturw. Cl. vol. xi. p. 217, pis. vi., vii. 
1882. Ccelodus suillus, F. Bassani, ibid. vol. xlv. p. 201. 
Type. Fish, wanting caudal fin ; Museum of Gymnasium, Zara. 
