104 



A EEVISION OP THE BEIIISH SPECIES OF 



this way the genera Temora and Temorella of Clans coincide 

 exactly with the sub-genera Halitemora and Eurytemora of 

 Giesbrecht. The salient characters of the two divisions are 

 expressed in the following table : — 



Right anterior antenna 

 of male 



Distal portion of posterior 

 niaxilliped 



Inner branch of first pair 

 of feet 



Fifth pair of feet of fe- 

 male 



Fifth pair of feet of male 



Serrations of terminal 

 spines of swimming 

 feet 



Fifth thoracic ring 



Habitat 



Halitemora^ Giesbrecht. 

 Temora^ Clans. 



destitute of spines 



five-jointed, elongated 



two-jointed 



three-jointed, without a 

 hooked pi'ocess 



clawed ; unlike on the 

 two sides ; foot of left 

 side dilated, forcipate 



coalescent 

 marine only 



^2<??y^e?«o?-«,Giesbrecht. 

 Temorella^ Claus. 



armed with spines 



four- jointed, feeble 



one-jointed 



four-jointed, having a 

 hooked process 



unlike on the two sides ; 

 both sides having 

 two-jointed prehen- 

 sile claws 



small 



free 



marine, brackish, and 

 fresh-water 



To the first group belong T. longicornis (Miiller) and T. armata, 

 Claus; to the second, T. velox, Lilljeborg; T. inermis, Boeck; 

 T. Clausii, Hoek ; T. affinis, Poppe ; and T. lacustris, Poppe. 



Quoting from the "Index Bibliographir[ue" of Messrs. De 

 Guerne and Richard, the paper of Dr. Giesbrecht in which he 

 proposes the name Eurytemora was published on the 16th of 

 May, 1881. I do not know not precisely the date of publication 

 of Dr. Claus's memoir on ^'■Temora and Temorella,^^ but inasmuch 

 as it was "read" on the 12th of May, 1881, the date of its 

 publication must necessarily be later than that of Giesbrecht. 

 By virtue of priority, therefore, the generic name Temorella 

 must give way to Eurytemora ; and as it seems to me much 

 better to divide the old genus Temora than to adopt Giesbrecht's 

 plan of forming under it two new subgenera, I prefer (with Dr. 

 Claus) to retain for the ^^ Halitemora''^ group the old name 

 Temora, adopting Eurytemora as the generic name of the re- 

 maining species. 



