G. O. Sars. 



Tribe Notostraca. 



Fam. Apodidæ. 



Gen. Lepidurus, Leach. 



1. Lepidurus Angasii, Baird. 



(PL 1). 



Lepidurus Angasii, Baird, Description of two new species 

 of Phyllopodous Crustaceaus. Proc. Zool. Soc. London 1866, 

 p. 122, PI. XII, fig. 1. 

 Syn.? Lepidurus viridis, Baird. 



» Lepidurus virididus, Tate. 



» Lepidurus KirJcii, Thomson. 



Specific Characters. Carapace regulary oval in form, with 

 a comparatively short dorsal keel, extending for about Vs of 

 its length, and terminating behind in a projecting tooth, poste- 

 rior emargination rather shallow and finely dentated, lateral 

 edge of carapace generally smooth. Posterior part of body 

 extending more or less beyond the carapace, and having the 

 segments coarsely dentated on the hind edge. Caudal lamella 

 somewhat varying both as to size and form, generally being, 

 in adult specimens, of a narrow linguiform shape, and scarcely 

 expanded distally, its dorsal keel well marked and armed with 

 a variable number of short spines, edges very finely denticu- 

 lated throughout, the denticles being somewhat unequal, tip 

 blunted and entire. Caudal filaments of the usual appearance. 

 First pair of legs with the 4th endite almost attaining the 



