100 GUIDE TO THE FOSSIL REPTILES, AMPHIBIANS, FISHES. 
Wall-case 
17 . 
Table-case 
30 . 
Table-case 
30 . 
Table-case 
30 . 
Wall-cases 
16 - 18 . 
Table-cases 
30 - 32 . 
Wall-case 
16 . 
Table-case 
30 . 
Sub-order 7.—Anaeanthini. 
Cod-fishes are discovered first in the Oligocene black 
slates of Glarus, Switzerland, which were probably deposited 
in comparatively deep sea. The fossils belong to an extinct 
genus, Nemopteryx , and are exhibited in Wall-case 17. 
Typical flat-fishes, resembling small turbots (Bhombus), 
are exhibited from the Upper Eocene of Monte Bolca; and 
there are soles (Solea kirchbergana) from the fresh-water 
Lower Miocene of Wurtemberg. 
Sub-order 8. —Percesoces. 
Although these are intermediate between the old bony 
fishes and the highest spiny-finned fishes, nothing is known 
with certainty concerning extinct members of the sub-order 
below the Upper Eocene. Good specimens of Atherina , 
Mugil , and Sphyrwna , are exhibited from the Upper Eocene 
of Monte Bolca, and from the Lower Oligocene of Aix in 
Provence. 
Sub-order 9. —Hemibranehii. 
The “ pipe-fishes/’ “ sea-horses,” and their allies date 
back to the Upper Eocene, and several fine examples are 
shown in Table-case 30. Calamostoma is a “ sea-horse ” 
with a well-developed tail-fin, from the Upper Eocene of 
Monte Bolca. 
Sub-order 10.—Aeanthopterygii. 
The highest bony fishes wdth spiny fins first appear in 
the Upper Cretaceous, and nearly all the principal groups 
are represented among Eocene fossils. It is remarkable that 
they have undergone scarcely any change during the Tertiary 
period. Even so curious a fish as Mene (Fig. Ill) is repre¬ 
sented by typical skeletons in the Upper Eocene of Monte 
Bolca (Wall-case 17, Table-case 31). 
As might be expected, most of the Cretaceous Acantho- 
pterygii belong to the comparatively primitive family 
Berycidse. The wonderfully well preserved specimens of 
Hoplopteryx (Fig. 109) from the English Chalk are especially 
noteworthy. Homonotus is another genus from the English 
Chalk, while Acrogaster, Pycnosterinx, and Dinopteryx are 
