CHAP. xv. THE CRUSTACEA. 301 



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 maxillaris 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 inspection. We have not been able to find 

 Mr. Bate's answer. 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 rapax. " 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 Edwardii; 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 studying and classifying. These Crus- 

 taceans 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 Entomostraca which 

 bad been collected from the stomach of a mackerel, 



