114 BRITISH COPEPODA. 



scarcely as long as the first cephalothoracic segment. 

 All the branches of the swimming feet 2-jointed 

 (fig. 10). Fifth pair of feet (fig. 11) 2-jointed, 

 first joint short and very broad, and armed on the 

 external angle with a long spine, second much 

 smaller, having one long spine at the apex and a 

 minute tooth at the inner angle. Caudal rami short, 

 finely and densely plumose, about equal in length to 

 the preceding segment; of the setse, the internal is 

 nearly twice as long as the external; of the two 

 intermediate setae the internal is somewhat longer 

 than the external, and about equal in length to the 

 whole abdomen. Length -j^-th of an inch (1/4 mm.). 



The only British locality in which this species has 

 been noticed is a pond in Lambton Park (Durham), a 

 gathering from which place, kindly sent to me by the 

 Rev. A. M. Norman, contained many specimens. 

 This is the more interesting, as from a pond in the 

 same park Mr. Norman years ago obtained fragments 

 (but no perfect specimeDs) of another Entomostracan 

 Lynceus acanthocercoides, Fischer which has not 

 been found elsewhere in Britain. C. Kaufmanni 

 appears not to be known on the continent of Europe, 

 the type specimens having been found in Turkestan. 

 It is, however, very closely allied to an Austrian 

 species C. Clausii y Heller. 



