148 . THE VOYAGE OF H.M.S. CHALLENGER. 



I reoret 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 Pycnogonids of his latest 

 cruises had been entrusted. He kindly comphed with my request, and informed me that 

 the Pycnogonids 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, I9th May 1881. 



