168 APHRODITA. 
The length of specimens apparently full-grown, including antenne 
and bristles, is eighteen lines, breadth three. Form nearly linear. From 
fourteen to perhaps eighteen pair of scales, always composed of two 
colours, cover the body ; each scale having the second colour as a broader 
or narrower partial marginal border on the interior side, which mar- 
gins meeting, produce a narrower red, brown, or black stripe, of various 
intensity, down the back of the animal. 
The colour of different specimens, therefore, is not only very differ- 
ent, but alternations ensue in the same specimens. 
The scales of the specimen, fig. 10, were wood-brown, with a cres- 
cent of the inner edge blackish-brown. ‘They were so thin as to expose 
the animal’s head of a reddish colour, which seems common to most 
of the Aphrodita. It had lost almost all the scales a week after being 
taken, when the body appeared of the faintest purple, the head more 
livid, exposing its four black eyes. About forty pencils bordered the 
sides, and a red line traversed the pearly belly. 
In five days longer only five of the original scales remained. 
Before this time, however, as the loss of the scales was gradual, 
small distinct circular marks appeared on the upper surface at the root 
of the pencils, indicating incipient regeneration. Their advances became 
sensible on the 15th of October, but the middle of the back remained 
bare, the scales being yet too small to cover it. In six days, however, 
the edges of each row met, when the margin was there coloured between 
crimson and purple, though for sometime remaining pale. On the Ist of 
November, scarcely any difference could be discovered between the ori- 
ginal scales and those regenerated. Their progress had advanced ; deep 
purple stained the margin of the whole on the 12th. Already the dark 
stripe appeared down the back, which had become still more conspicuous 
on the 21st, by the edges overlapping each other. 
The animal survived a month longer, and never displayed the usual 
timidity or ready retreat from the light common to its kind. 
The margin of the proboscis is surrounded by about eighteen stout, 
triangular, flattened, fleshy papillary organs, and the anterior of the pro- 
