108 ME. THOMAS SCOTT ON THE 



three moderately sborfc and stout setse, there is also a stout and 

 moderately long apical seta and a smaller one at the termination 

 of the inner margin ; the basal joint is scarcely produced 

 interiorly, and is provided with three spiaiform setse on the 

 broadly rounded apex, the middle seta being considerably longer 

 than the other two and plumose. 



Memarhs. — This species has a superficial resemblance to 

 TJialestris hibernica, Brady & Eobertson, and I was at first 

 inclined to regard it as a northern variety of that form. I had 

 recently, however, the opportunity to compare typical Scottish 

 examples of TJialestris Mbernica with the Franz-Josef Land 

 specimens, and fiod that they are quite distinct, the difference 

 in the length of the caudal furca being alone sufficient to 

 distinguish the one from the other. 



Thalestkis foeficula, Glaus. 



1863. Thalestris forficula, Claus (23), p. 131, pi. 17. figs. 7-11. 



The Pranz-Josef Land Copepod which I now record under 

 this name is similar to a form described and figured in the 

 ' Annals and Magazine of Natural History ' for October 1893, 

 by T. and A. Scott, under the name of Thalestris forficuloides. 

 I am now inclined to consider that species as a ' form ' of Claus's 

 Th. forficula. Its occurrence at Eranz-Josef Land extends con- 

 siderably the distribution of the species. It was obtained in a 

 gathering dredged off Cape Gertrude in 30 fathoms, July 21st, 

 1897. In Scotland it has been obtained both in the Firths of 

 Forth and Clyde. 



Thalesteis peiguda, sp. n. (PL 7. figs. 17-23 ; PI. 8. figs. 

 1,2.) 



Description of the female. — Body robust, length 1"63 mm. 

 {-^ of an inch). Eostrum prominent. Antennules short, 

 moderately stout and 9-jointed ; the sixth and last joints are 

 each of them about equal to the combined lengths of the seventh 

 and eighth (fig. 18) ; the proportional lengths of all the joints 

 are shown approximately by the formula : — 



Proportional lengths of the joints ... 48 . 24 . 24 . 20 . 12 . 16 . 7 . 8 . 16 . 

 Numbers of the joints 12 3 466789* 



The mouth-organs are somewhat similar to those of Thalestris 

 onysis, Claus, except that there is a slight difference in the 



