12 
SECTION I. 
CONCH1FERA CRASS1PEDA . 
The foot of the animal thick, the shell gaping conside- 
rably. This section contains four families : Tubicolaria, 
Pholaderia, Solenacea, and Myaria. 
TUBICOLARIA. 
Inhabiting a tube. 
TEREDO. 
GENERIC CHARACTER: Tube testaceous, cylindrical, 
flexuous, open at both ends, not belonging to the shell, and 
covering the animal. Shell bivalve, placed posteriorly, 
on the outside of the tube. 
* T. NAVALIS. Lin. Pen. Brit. Zo., vol. 4, p. 147. 
Stew. Eiem., vol. 2, p. 423. Mont. Test. Brit., vol. 2, 
p. 527. Fleming’s British Animals, p. 454. The posterior 
valves or pallets, Crouch’s Intr., pi. 2, fig. 10, b, the jaw 
10 a. Anger Worm. 
This animal enters wood that has been penetrated by Sea 
Water, and soon enlarges its habitation ; devouring tor- 
tuously in the direction of the fibres, and filling its intestines 
with the saw dust, to a state of great distension. It pene- 
trates to the length of about a foot, in a chamber something 
less than an inch in diameter ; and is capable of retracting 
itself, or turning in an inclinod direction, to avoid any 
formidable obstacle. At first these animals do not eat into 
each others chambers; and when this has happened, they 
retreat and take a new direction. But when their numbers, 
and the complexity of their habitations have increased, the 
substance of the wood may be found pierced in all directions, 
so as at last to fall asunder; and like' the fabled hero of 
antiquity, the life of the animal depending on the existence 
of the log, the whole perish together. 
Their mode of increase is uncertain ; but at an early 
period of their lives they must possess a free existence, for 
they enter wood that has never been deeply immersed ; and 
that, contrary to former opinion, they are permanent inha- 
bitants of our sea, appears from the fact, that they have been 
found in wood belonging to vessels, sailing from our own 
ports, that have sunk on our coast ; and the timbers or 
which have been afterwards recovered. 
* T. MALLEOLUS. Flem. Brit. An., p. 454. 
This species is smaller than the former; it is probably 
more rare, and in my observation, the tube is more slight 
and thin. As however, my remarks are derived from son'® 
that had not penetrated deeply, I do not feel confident 11 
the general want of solidity of the tube ; tor in the T. Navali** 
even when of considerable size, the tube is often found 9 - 
