new and rare Crustacea from Scotland. 463 



{Canthocamptus) brevipes, G. O. Sars. It was discovered in 

 some hand-net gatherings from Loch Lubnaig, Perthshire, 

 collected in September last. A description, with drawings, 

 of it will be published in the ' Thirteenth Annual Report of 

 the Fishery Board for Scotland.' 



PSEUDOTHALESTRIS, G. S. Bradj. 



Pseudothalesti-is, G. S. Brady, Report on the ' Challenger ' Copepoda, 

 p. 100, pi. xlii. figs. 1-8 (1883). 



In the Report on the ' Challenger ' Copepoda Dr. Brady 

 has described a new genus of the Harpacticidse under the 

 above name. He had only a single specimen (a male), which 

 he describes as being like Thalestris ; its characters were so 

 marked, as to be of generic rank. This Copepod was 

 obtained by Dr. Brady in a gathering from Betsy Cove, 

 Kerguelen Island (lat. 49° 16' S., long. 70° 12' E.). 



Last year one of the authors of this paper instituted a new 

 genus — Pseudowestwoodia — for the reception of a Copepod that 

 closely resembled Westwoodia nohilis (Baird) in general 

 appearance, but differed in some important structural details. 

 The genus Pseudowestwoodia was described, with illustrative 

 drawings, in the ' Twelfth Annual Report of the Fishery 

 Board for Scotland,' published last year. Descriptions of 

 other two species of the same genus were published by us in 

 the ' Annals and Magazine of Natural History ' for January 

 last. 



A short time ago, when looking over the Report on the 

 ' Challenger ' Copepoda, we happened to observe a certain 

 resemblance between Dr. Brady's Pseudothcdestris and our 

 Pseudowestwoodia ; a careful study of the two was then made, 

 with the result that we believe them to be identical. It is 

 unfortunate that Dr. Brady had only a single specimen (and 

 a male) to describe from ; had it been a female, the identity 

 of the two genera would no doubt have been more clearly 

 established. Though our name — Pseudowestwoodia — is more 

 in accord with the general form of the British species of the 

 genus, there can be no question as to the priority of Pseudo- 

 thalestris. 



It is surely of much interest to find in this little group of 

 Copepoda another instance of the remarkably close similarity 

 tetween organisms living on opposite sides of the globe. 



