MCERA GROSSIMANA. 
351 
is quite as long as the tail, and therefore is half the 
length of the animal. The eyes are kidney-shaped, and 
generally black. The superior antennae are long, being 
about half the length of the animal, hut the peduncle 
forms at least two-thirds of its length, the secondary 
appendage consequently appearing to be placed nearer 
to the distal extremity than is usually the case. The 
inferior antennae, likewise, have the peduncle forming a 
considerable portion of the entire length of the organ, 
which, however, does not reach beyond the extremity of 
the peduncle of the superior. The coxae of all the legs 
are short, and are but slightly developed in the form of 
plates, clearly demonstrating the true relation of this 
joint to the rest of the leg. The first pair of legs are 
small, and have the hand but slightly dilated : it is oval 
in form, and has the palm convex and imperfectly 
defined. The second pair of legs have the hand very 
large (whence the specific name) ; the hand is as long 
as the head and the first two segments of the body, its 
width being rather more than half its length ; the 
superior and inferior margins are not parallel, and are 
fringed with fasciculi of hairs; the palm is slightly 
oblique, and furnished with one or two obtuse teeth, and 
defined by a small sharp tooth. The walking legs are 
nearly of the same length ; the last three have the thighs 
but slightly dilated, their posterior margin being 
serrated. The caudal appendages are long, but the last 
pair is the shortest, and scarcely reaches beyond the 
extremity of the preceding pair. The central caudal 
appendage consists of two ovate plates, with the distal 
extremity emarginate, the centre of which is armed with 
a long and a short hair. 
When alive the animal is very transparent ; its colour 
being faint yellow, tinted with rose. 
