CHAP. XV.| The Crustacea. 267 
the same organs in the Anceus mazillaris. Here I have never seen 
them to overlap each other as they do in the one just named. And, 
having frequently kept them alive, I have seen their mandibles open 
and shut times without number; and, so far as I could make out, 
they never crossed each other in the least. Indeed, I do not think 
they could have done so, from their construction. They seem to me, 
when they do shut, to go together in the fashion of a rat-trap when 
closed. And, besides several other distinctions which I have been able 
to discern, there are two or three small bunches of stiff hairs or spines 
projecting from the front of the head which I do not see in Anceus 
mazxillaris and the others which you describe. I would also point out 
that there is a most remarkable similarity in the tail or hind-part of 
this species and the same portion of the Praniza Edwardii.” 
In support of his views, Edward forwarded some further 
specimens of the supposed male to Mr. Bate for his in- 
spection. We have not been able to find Mr. Bate’s an- 
swer. It has doubtless been lost, like many of the missing 
letters. But we gather from a future letter of Edward that 
Mr. Bate considered the specimens to be Anceus rapaa. 
“ Never having seen a description or plate of that species,” 
said Edward, “I can say nothing as to that matter..... 
But, call him what you like, I am more than ever persuaded 
that he is the tight little husband of Praniza Hdwardii ; 
and, as such, I now intend to place them together, and to 
name them accordingly.” 
Many of the crustacea which Edward collected did not 
belong to the sessile-eyed order, which Mr. Bate was study- 
ing and classifying. These crustaceans he sent to other 
observers. For instance, when Mr. Bate was about to set 
out for Paris to examine Milne-Edward’s typical crustacea, 
he received from Edward a letter containing some ento- 
mostracea which had been collected from the stomach of 
a mackerel. “I do not,” replied Mr. Bate, “study the 
entomostracous crustacea myself; so I gave some of those 
you sent me to Mr. Lubbock, and some to Dr. Baird, of the 
British Museum, from both of whom I hope you will hear.” 
In a future letter, Edward sent Mr. Bate some worm-like 
