EE VISED RE POUT ON L.M.B.C. CoPEl'ODA. 88 



there as well as several rare ones not taken in any other 

 part of the district. Indeed it seems probable that it is 

 from dredged material in such locahties that we must look 

 chiefly for additions to our microscopical fauna, the free 

 swimming forms of our district being more completely 

 tabulated. 



Experience further leads me to the opinion that small 

 isolated tracts, probably local depressions in a muddy or 

 sandy bottom are particularly rich in Copepoda, apparently 

 similar material taken from near such local centres having 

 at the same time proved most unprolific or nearly alto- 

 gether destitute of hfe. The rock pools at Hilbre Island 

 as well as those of Puflin Island have proved valuable 

 hunting grounds worked with a fine hand townet. 



The parasitic species in the Eeport found in the bran- 

 chial sacs of Ascidians have all been sent to me by Prof. 

 Herdman. To him also and to his "Fisheries Laboratory " 

 Assistant Mr. P. J. F. Corbin I am indebted for a large 

 number though hitherto not a great variety, of fish 

 parasites. The recent establishment of this Fisheries 

 Laboratory gives promise of much valuable opportunity 

 for the study of this important and rather neglected 

 branch of our Copepodan fauna. Many of the other fish 

 parasites here recorded w^ere collected by our lamented 

 colleague Mr. Frank Archer, B.A., while staying at Bull 

 Bay, Anglesey. 



A new form of Lichomolgiis, L. agilis, has been recently 

 described by Mr. Thomas Scott, F.L.S., of the Scottish 

 Fishery Board, from specimens inhabiting the inside of 

 Cockle shells. This species I have found in the water of 

 all the fresh cockles examined and it is probably very 

 common, although previously overlooked. I had, however, 

 taken it two years ago in a night townet ting off Pufiin 

 Island, and put it aside as a new form, but deferred any 



