THE PELAGIC FAUNA AND FLORA. 191 
greater. Indeed, if their habits were similar to those of like 
animals at the present day, they must have supplied a large part 
of the animal food of deep-sea forms. The heteropods are rep- 
resented by abundant specimens of Firoloidea (Fig. 112), many 
fully sixteen inches long, associated with Pterotrachea; Carina- 
ria is also frequently seen. 
We know only enough of the habits of our cephalopods to 
be able to state that some of the species, like Stenoteuthis, 
Fig. 112. — Firoloidea. 4. 
Stauroteuthis, and the giant squids of Newfoundland, are un- 
doubtedly pelagie at times, although the majority of the spe- 
cies known to come from our coast have been dredged from 
considerable depths. Many of the cephalopods have great 
Fig. 114. — Spirula 
"oh 
ry 
Peronii. 
iy. 
Fig. 115. — Argonauta. 
$. (Verrill.) 
E EREA 
URAL 
Fig. 113. — Argonauta. 3. (Verrill.) 
freedom of locomotion, and equal fishes in their migrations, 
often moving in schools. But it will always be difficult to fix 
