462 
C0RGPHI1D/E. 
half its length, and but slightly produced upon the 
inferior margin ; together they form a long oval, having 
the palm not defined ; the finger is finely crenulated 
along the inner margin. The coxae are not deep except 
in the fifth pair of legs, which, in the specimen from 
which our figure is taken, are deeper than the preceding, 
— an unusual, and we believe an accidental or abnormal 
occurrence. The thighs of the five pairs of walking 
legs are broadly dilated, pear-shaped, the distal part 
being the broadest. The caudal appendages have the 
margins of the branches minutely serrated and armed 
with a few small spines ; the posterior pair are very 
strong, unibranched, and tipped with two or three short, 
liook-like spines. The middle tail-piece consists of two 
lobes, each being armed with several rows of short sharp 
teeth, one lobe being represented at the upper part of 
figure v . 
This animal is of a yellow or straw colour, beautifully 
marked with fine pigment cells, which appear to be most 
abundant on the coxae and along the margins of the 
segments of the body of the animal. 
We have placed this species in Dana’s genus because 
we have not had proof of its actual relationship to 
Cerapus. We, however, have scarcely any doubt in 
considering it as being the female of Cerapus abditus , 
especially as Mr. Alder, who sent the specimen to us, 
stated that it was the inhabitant of a tube, and as its 
sex is indicated by the eggs seen in its egg-pouch. 
We received this specimen, from which our description 
and figure are taken, from Mr. Alder, who dredged it 
on the coast of Northumberland ; and we have a drawing 
of a specimen that we took with a dredger some years 
since in Oxwich Bay, on the coast of Glamorgan, which 
we believe to be identical. 
