KM) COPKI'UDA. 



pair also resemble those of that species; the hasal joint is 

 about twice the width of the second joint ; the outer distal 

 aiiii'le is blunt, pointed at the apex and slightly notched 

 below, and is furnished with a moderately long, finely 

 plumose seta : the second joint is narrow, rather longer 

 than broad, the inner margin, which is slightly rounded, 

 is notched near the distal end for the insertion of a minute 

 sharp-pointed tooth-like spine, while a moderately long, 

 finely plumose seta similar to the one on the b:isal joint- 

 springs from the apex, as shown in the drawing (PI. XX. 

 fig. 3). 



The f arcal joints are fully as long as the last two abdominal 

 segments taken together ; a small seta springs from near 

 the distal end of the outer margin of each joint, as in 

 C. vernalis, and there is also the usual number of terminal 

 set8e (PL XVIII. fig. 9). 



In all the specimens examined the ovisacs were com- 

 paratively small, but they contained moderately large ova, as 

 shown in PI. XX. fig. 1. 



As we are at present unable to identify this form with any 

 species already described, the name we propose for it is 

 Cyclops venuxtus. 



This species occurred in a gathering from marshy ground 

 on Exmoor, at an altitude of 1450 feet above the sea, 

 collected on May 13th, 1904. 



Antennules composed of 11 joints. 

 CYCLOPS AFFINIS, G. 0. Sars. 



1862. Cyclops affinis, G. O. Sars, Oversigt af de indenlandske 

 Ferskvandscopepocler, p. 47 (separate copy). 



1891. Cyclops ajfiitis, Brady, 1. c. p. 21, pi. viii. figs. 1-6. 



1892. Cyclops affinis, Schmeil, I. p. 157, pi. vii. figs. 1-7. 

 1901. Cyclops affinis, Lilljeborg, p. 98, pi. vi. tigs. 15, 16. 



Sparingly in the River Otter and Topsham Marshes, Devon, 

 collected June 29th, 1904 ; also obtained in a gathering from 

 Slapton Lea, Devon. 



CYCLOPS DIAPHANUS, Fischer. 



1853. Cyclops diaphanus, Fischer, " Beitr. z. Kenntn. St. Peters- 

 burg Copepoden (Fortsetzung)," Bull. Soc. Imper. des Natur. 

 Moscou, vol. xxvi. p. 93, pi. iii. figs. 6-12. 



1862. Cyclops nanus, G. 0. Sars, Oversigt af de indenlandske Fersk- 

 vaudscopepoder, p. 42 (separate copy). 



1901. Cyclops diaphanus, Lilljeborg, p. 63, pi. iv. figs. 13, 15. 



This small Cyclops occurred very sparingly in a gathering 

 from Topsham Marshes, Devon, collected June 29th, 1904. 



