PHRYXUS ABDOMINALIS. 235 
The mouth in the full-grown male, in which probably 
but little food is taken, is reduced to a small conical fleshy 
lobe on the underside of the head. 
The seven segments of the body are quite distinct, and 
the seven pairs of legs are affixed near the sides of the 
body beneath, and may be extended considerably beyond 
the sides, although generally hidden by being folded 
inwards close to the sides when at rest. 
The tail forms a subconical piece, having all its seg- 
ments closely soldered together with very slight indica- 
tions of the articulations. 
The female, when full-grown and distended with eggs 
(of which the number is immense), forms a large, nearly 
globular, mass, with one side of the body swollen to such 
a degree that it extends far beyond the limits of the 
head, absorbing the legs on this side, with the exception of 
the most anterior. This is exhibited in the lower figure on 
the left-hand side of our woodcut, where the mouth is in- 
dicated by the small dark-shaded portion resting ona 
somewhat heart-shaped base, having a leg with a dilated 
basal joint on either side, that of the right side succeeded 
by a series of folds, within which are attached the bases 
of the succeeding legs, whereas those of the left side are 
obsolete. These legs are slender, and terminated by an 
oval hand with a weak and curved finger, obtuse at 
its tip. 
The sides of the body of the female are provided with 
very large scales, not arranged in pairs, and which fall 
backwards so as to cover the body. 
The tail consists of five segments, of which the four 
basal ones are short and narrow, having on either side a 
large and a small fleshy lobe of an oval shape, but varying 
in size according to the side of the body to which they 
are attached; being the largest on the dilated side. The 
