148 THE VOYAGE OF H.M.S. CHALLENGER, 
I regret very much that in my report species will be found mentioned, described, and 
figured as new, which at the date of its publication will have been already described. 
As I was aware of the large collections of deep-sea animals collected by Professor 
Alexander Agassiz, and felt sure that my report, with its numerous plates, would take 
- a considerable time in passing through the press, I took the liberty of writing to 
Professor Agassiz, to ask him to whom the working-out of the Pyenogonids of his latest 
cruises had been entrusted. He kindly complied with my request, and informed me that 
the Pyenogonids along with the Crustacea had been sent to Professor Alphonse Milne- 
Edwards in Paris. I then addressed Professor Milne-Edwards, sending him at the same 
time proof-copies of the plates of my report on which the new species were figured, and 
as he favoured me with an answer, in which he promised to make use of the names 
proposed by me, I had every reason to believe that zoological literature, at least in the 
case of the deep-sea Pycnogonida, would not be encumbered by synonyms. Where I 
have not been successful in this respect I hope nobody will lay the blame upon me. 
LEIDEN, 19th May 1881. 
