MONTAGUA MONOCULOIDES. 
55 
is composed of many small jointlets,* each having several 
cilia. The inferior pair are shorter than the superior, 
and less robust. The mandibles are long and narrow, 
and furnished with a serrated cutting margin. The 
outer pair of foot-jaws have the third and sixth joints 
respectively longer than the fourth and fifth conjoined: 
the seventh terminating in a sharp point. The first 
pair of legs are short and slender, having the first joint 
not developed into a scale ; the hand is longer than the 
wrist, and developed in the same form as that of the 
second pair; the palm is very oblique, and defined from 
the inferior margin by a very obtuse angle. 
The second pair of legs have the first joint large, 
scale-like, narrow, increasing in breadth gradually from 
the body, and reaching so far in front as to cover the 
appendages of the mouth ; the wrist is short ; the hand 
long, ovate ; the palm oblique, slightly convex, and de- 
fined by an obtuse angle, armed with two short sharp 
spines, against which the apex of the slightly-curved 
finger impinges. The third pair of legs have the first 
joint more largely developed than that of the preced- 
ing pair of limbs, and with the inferior margin fringed 
with minute equidistant cilia, situated within the edge ; 
the foot is slightly bent, having the margins parallel, 
and armed upon the inner distal extremity with two 
short sharp spines, against which the finger impinges 
near the base, thus giving the foot a prehensile capa- 
bility. The fourth pair of legs are like the third, but 
have the first joint still more largely developed, being not 
only produced anteriorly, parallel with the preceding, but 
extending as far back as the penultimate pair of legs. 
* The term jointlet, or articulus, is used to indicate its distinction from 
a joint : some authors have described the flagellum as a single joint, and 
others as if every articulus was a distinct joint. 
