47 
Posterior wings pale fuscescent, with two rounded fuscous spots in 
the cell; several scattered liturze of the same colour before the middle 
of the wing, then two transverse bands also fuscous, followed by a 
series of seven black spots pupilled with white, the last bipupillate, 
the second spot the largest: between these spots and the margin a 
third fuscous band. 
Head, thorax and abdomen black. 
The beautiful butterfly which I have drawn is I believe unique in 
my own collection. It was taken by my friend Mr. Empson many 
years ago in South America, and was one of a very few things—all at 
that time very rare—which were saved from the shipwreck of a large 
collection. 
Mr. E. Doubleday, whose experience gives him great facility, has 
kindly supplied me with the generic characters. 
2. Description oF EcHINOGERUS CIBARIUS, A NEW SPECIES AND 
SUBGENUs oF Crustacea. By Apam Wuitt, F.L.S. etc. 
(Annulosa, pl. 2, 3.) 
Amongst the Decapod Crustacea there are several genera of doubt- 
ful situation which belong to neither of the greaf divisions Brachyura 
and Macroura. Professor Milne-Edwards first brought them together 
as a section, under the name of Anomoura; but, as he remarks, they 
do not form a very natural group, the principal advantage derived 
from its formation being the opportunity which it gives the syste- 
matist to withdraw all the aberrant species from the two very natural 
sections specified above. Not a year passes but new species are added 
to this group, and occasionally a new form is found; in course of 
time these discoveries will serve to link genera which seem at pre- 
sent to be distant from each other, if at all related. The species 
described below is close to the genus Lithodes, some of the species 
of which have considerable resemblance to it. The generic name 
describes the peculiarity of the spined appendage to the outer an- 
tenn, while the specific name is given in allusion to its excellence 
as an article of food. 
In one of the two specimens in the British Museum, the legs, cara- 
pace and abdomen are covered with numerous barnacles, and on 
taking off the old carapace, which had commenced to split, the still 
coriaceous envelope, which would have formed the new carapace, 
may be found beneath it. On this are very plainly indicated the 
crowded warts, the scattered knobs, and lateral projecting spines, 
which are so prominent on the outer surface of the old carapace. 
The different regions of the carapace are also clearly distinguished : 
the body of this new carapace is coriaceous ; the warts are more cal- 
careous, and consist for the most part of small irregularly-shaped 
plates, arranged circularly round a small group of calcareous scales. 
These groups are of different sizes, from that of the head of a small 
pin to the space occupied by the top of a tolerably large nail. On 
a small portion of the carapace, on each side of the middle knob, and 
per 
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