cHAY.xv.] Shrimps and Parasites. 277 
you are to pay the compliment to Mr. Bate..... Your ob- 
servations on the habits of the Thysanopoda are very inter- 
esting.” 
Edward evidently supplied his correspondent with abun- 
dant examples, for on the 27th of January, 1863, Mr. Nor- 
man writes: “The parasite on the fin is Anchorella rugosa 
—not a common species. I hope you will procure more. 
The Pagurus cuanensis bore on its back an example of a 
highly interesting genus of parasitic crustacea, Peltogaster. 
The specimens do not belong to the species hitherto recog- 
nized in our seas; perhaps they are still undescribed.” 
Mr. Bate also wrote to Edward during the same month 
of January: “TI think that your last long-legged shrimp 
may be a new genus. If so, I propose calling it Polledac- 
tylos..... There are other things of much interest also. 
Do try what you can do in the way of collecting specimens 
of the young of crabs, etc. Your species of Stenothoé cly- 
peatus is new to Britain.” 
During the next few months Edward was in constant 
communication with Mr. Bate and Mr. Norman, who named 
for him an immense number of crustacea, Many of them 
“ were new to Britain; some of them were new to science. 
On March 6th Mr. Bate writes: ‘‘ The little fellow was a 
Pettidium purpureum. The long-legged Mysis are hand- 
some chaps. The second is, I think, @diceros sasignatus : 
if so, it is the first taken in Britain.” Again, shortly after, 
Mr. Bate asks: “Do you recollect a little fellow just like 
this? [giving a diagram]. I never saw the like of it before. 
Where did you get it? Do get me more! Is it a wood- 
borer? I am afraid that you will scold me when I tell you 
that I have not yet examined the green bottle which you 
sent me previously. I am just in the midst of describing. 
a number of crustacea put into my hands, belonging to the 
Boundary Commission between America and British Co- 
lumbia. When I finish this work, I will write to you again.” 
A few days later Mr. Bate examines the green bottle, and 
