AMPHITHOfi rubricata. 
419 
specimen being a dried one it does not fairly represent 
the living animal, which has the back somewhat elevated 
near the middle rather than depressed. The eyes are 
nearly round, and occupy a position on a lobe between 
the superior and inferior antennae. The superior antennae 
are about two-thirds the length of the animal ; the 
peduncle reaching to the extremity of the penultimate 
joint of the peduncle of the inferior ; the flagellum is 
long and slender, represented much too short in the 
figure, being probably broken in the long-preserved 
specimen of Montagu. The inferior antennae are one- 
third shorter than the superior, and the flagellum is 
scarcely longer than the last joint of the peduncle. 
The first two pairs of legs are nearly of the same size. 
The wrists are as broad anteriorly as the hands ; the 
hands are ovate, having a slightly-defined palm, and the 
fingers are serrated in the young but scarcely so in the 
adult specimens, while in the very young there is but a 
single subapical tooth and several hairs. The next two 
pairs of legs are short, but have the thighs broad. The 
fifth pair are very short, but the two last are longer 
and have the distal extremities not narrowed, and fur- 
nished with two or three short stiff spines which assist 
in perfecting the prehensile grasp of the finger when 
it shuts. The last pair of caudal appendages terminate 
in a foliaceous plate and well-developed hooks. 
The colour of adult specimens is a brilliant crimson, 
spotted with several large blotches of white with small 
spots of black near their margins. By the aid of the 
microscope the colour is perceived to be due to a close 
network of stellate pigment covering a corneous ground. 
In the very young animal this corneous tint universally 
prevails except the few white blotches. When the 
animal is somewhat grown some small spots of red are 
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