Pisces — Teleostei. 
75 
order Amioidei, represented by the genera Caturus , Leptolepis , 
Thrissops, &c. 
Order V.— TELEOSTEI. 
The remaining Wall-cases (Nos. 16 — 18) contain the order of 
Teleostei (fishes with a well-developed, bony skeleton). The 
E sodden (the pike), Glupeidce (the herrings), and Salmonidce 
(the salmon and trout), including the genera Esox, Glupea , 
Osmeroides , with the Percidce (or perches), Perea , Smerdis, &c. 
Wall-cases Nos. 17 and 18 contain the Cretaceous, spiny- 
finned fishes of the genera Beryx and PLoplopteryx , and the Eocene 
fishes from the Canton Glaris slates, of the genus Anenchelum , 
&c., together with the Percidce (perch family), and the curious 
thread-fin, Gastronemus , from Monte Bolca. 
The Table-cases follow the same arrangement as is observable 
in the Wall-cases, varied only by the size and number of the 
specimens by which each family is represented. 
This terminates the series of Vertebrate fossils, and in the 
next Gallery we commence with the Invertebrata (animals 
without a backbone) — such as Cuttlefishes, Snails, Oysters, 
Insects, Crabs and Lobsters, Worms, Sea-urchins, Corals, &c. 
Invertebrate Animals. 
Sub-Kingdom 1. — Mollusca (Soft-bodied animals). 
Division A. — Mollusca (proper). 
Class 1. — Cephalopoda. 
In Narrow Gallery (No. 7 on Plan) are displayed the fossil 
Cephalopoda,* being the first section of the Invertebrate 
animals and the highest division of the Molluscan Class. 
The animals of this class are all marine, and are provided 
with long feelers or tentacles (sometimes called feet) attached 
to the head around the mouth, whence the name Cephalopoda, 
or “head-footed,” is derived. Here are placed the fossil repre- 
sentatives of the existing Octopus , and the Squids and Cuttle- 
fishes, the delicate Paper Nautilus and Spirilla, also the Pearly 
Nautilus. These are divided into two great groups, the 
Pibranchiata, or two-gilled, and the Tetrabranchiata , or four- 
gilled Cephalopods. 
The first of these includes the most active free-swimming 
forms to which all the living genera belong. One solitary 
form, a survivor of the second or Tetr abranchiate division, 
namely “the Pearly Nautilus,” is still found living in the 
Indian Ocean. 
* From K£^aX>), head, and irovg , iroSog , a foot ; hence “ head-footed.” 
Fossil 
Fishes. 
Gallery, 
No. 6. 
Wall-cases, 
Nos. 16 to 
18. 
Wall-cases, 
Nos. 17 and 
18. 
Table-cases, 
Nos. 49 to 
56. 
Mollusca. 
Cephalo- 
poda. 
Gallery, 
No. 7 
on Plan. 
