ROOM XI.] NATURAL HISTORY. 47 
stout oak planking of a ship. A fine specimen of this fish 
is in a Case over the Fire-place, and by the side of it a 
piece of oak plank pierced by the beak of a larger fish of 
this species. The fish itself is very rare, yet several well 
recorded instances of similar occurrences are known. In 
many genera of the Scomberoid family, the spines, which 
in most fishes support the front dorsal fin, instead of being 
united together, are separate and free. This is the case 
with the Pilot Fish ( Gasterosteus ductor ), and the Lichia 
(<Scomber glaucus). 
The next family of spinous fishes, the Tsenioids, resemble 
the Scombers in general appearance, but their bodies are 
very long and compressed on the sides, from whence they 
are called Riband Fish. One of these, the Garter Fish 
(.Lepidopus ), has the mouth long, and well armed with 
teeth, and the ventral fins reduced to small scales. This 
is the Zipotheca tetradens of Colonel Montague, who found 
it on the English coast. The Riband Fish ( Cepola ) differs 
in having a small oblique mouth and short muzzle, with 
the dorsal and anal fin united into a point at the tail. Over 
the Mantel-piece is also another fish of this family (Zo- 
photes), from the Mediterranean; its short head is sur¬ 
mounted by an elevated bony crest, from the top of which 
springs a long spinous ray, fringed behind by a broad mem¬ 
brane, and having the appearance of a feather. 
The family of Theutides combine with the small 
scales of the Scomberoid Fish the form and small mouth 
of the Cheetodon, but are furnished with a single row of 
teeth with cutting edges, and their fins are not scaly. 
They live on fuci and other marine vegetables. Several of 
the genera have sharp, retractile spines on the sides of the 
tail, which when drawn back are received in a groove, and 
from the wound they inflict they are often called Lancet 
Fish, or Surgeons. The Monoceros ( Naseus ) has the 
spines on the sides of the tail fixed and blunt, and the 
front part of the head produced into a horn. 
The Sea Mullets ( Mugil ), from the peculiarity of their 
form, have been separated into a distinct family, character¬ 
ized by having two dorsal fins, large scales, and a very 
broad flat head. 
The Blennies ( Blennius ) differ from the other spinous 
fishes, in their skin being slimy, from whence their name. 
