ß G. O. Sårs. 



Branchinecta and Artemia. It shows its 2 chief divisions 

 well defined, both being about of the same length The 

 anterior division may be subdivided into the head and the 

 trunk, the posterior one into the genital part and the tail 

 proper. 



The head is not very large, and but slightly deflexed? 

 carrying in front the 2 pairs of antennæ, laterally the eyes, 

 and ventrally the oral parts. By a distinct transverse 

 suture extending dorsally between the upper ends of the 

 mandibles it is divided into an anterior and a posterior 

 part, the latter representing the so-called cervical segment. 

 The anterior part seen from above (fig. ]), is almost 

 pentagonal in form, and exhibits in the middle of the 

 dorsal face a small, but well-defined, rounded quadrangular 

 area, which, in a lateral view of the animal (fig. 2), is 

 found to be slightly protuberant. This area may also be 

 observed in other Branchipodids, and would seem to answer 

 to the postocular tubercle in the Notostraca and the affixing 

 organ in some of the Conchostraca. The cervical segment 

 carries ventrally the 2 pairs of maxilla?, and exhibits on 

 each side a contorted duct, which undoubtedly answers to 

 the so-called shell-gland in other Phyllopods. 



The trunk is somewhat broader than the head, slightly 

 depressed, and divided into 11 uniform segments, each 

 carrying a pair of branchial legs. Seen dorsally (fig. 1), it 

 appears somewhat fusiform in outline, being broadest in 

 the middle, and slightly tapering both anteriorly and 

 posteriorly. 



The posterior division of the body is considerably 

 narrower than the anterior. Its first 2 segments form 

 together the genital division, and are coalesced in the 

 greater part of their extent, being only distinctly defined 



