OX ANNELIDA. 
93 
The oesophagus of the arenicola can, at the will of the 
animal, be unrolled externally, and form a sort of proboscis, 
all bristling with small tubercles. There are neither jaws nor 
teeth. The stomach extends towards the tenth gill. Its 
membrane is of a fine yellow colour, on which the vascular 
net-work of which we have spoken, is very agreeably drawn. 
At the anterior part of the body are on each side fi ve blackish 
pouches, which probably serve as testicles, and on the junc- 
tion of the cesophagus and stomach are two other conical and 
muscular pouches, of the use of which we are ignorant. The 
eggs are small grains of a yellowish colour, which swim in 
the interior of the body. 
This worm is very common on most sandy coasts. Fisher- 
men employ it as the best bait for catching sea-fisli. It even 
forms an object of commerce, and is sold dear enough in 
those places which do not produce it. It is found in the 
sand, at about a foot and a half or two feet in depth. Its 
retreat is discovered by small cordons of sand which it has 
voided, and which close the orifice of its hole. Its external 
colour is reddish, and it changes into a dark green. When 
it is touched it emits a liquid, of the colour of bile, which 
causes spots upon the fingers difficult to remove; but in the 
month of August it only sends forth a milky fluid. On draw- 
ing it lather slightly by the tail, the latter separates into seve- 
lal articulations, without any appearance of tearing. 
The Amphinome is a genus of marine worms, originally 
established by Bruguieres. The characters consist in an 
elongated body, more or less flatted, each articulation of which 
supports a pair of gills in the form of tufts, or little plumes, 
and in a mouth without jaws. Each articulation supports 
besides two tufts of hairs, or stiff setse, most frequently ac- 
companied, each of them, with a fleshy filament more or less 
long. The head supports a certain number of similar fila- 
ments, and sometimes an ornament in the form of a crest. 
