Number 141 July 9, 1923 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



A NEW SPECIES OF PHYLLOPOD 



By G. S. DoDDS 



Branchinecta occidentalis, new species 



Description : Male. — Length 9 mm. Swimming appendages 

 eleven pairs ; caudal segments without appendages, nine ; cau- 

 dal stylets a little larger than the combined length of the last 

 two segments. Claspers (2nd antennae) a little longer than 

 the distance between the outside surface of eyes (Fig. la) ; 

 first and second segments of about equal length; first segment 

 stout, its length about twice its thickness, moderately bowed, 

 with concavity inward ; this segment bears on its anterior, me- 

 sial aspect, near the base, a good sized process, curved like a 

 blunt horn, and l>earing on its mesial (convex) surface a num- 

 ber of spines ; the two processes are placed with their apices 

 close together, so that the two together make a prominent point 

 between the bases of the appendages. Second segment much 

 more slender than the first, slightly curved and gently taper- 

 ing; the inner (concave) surface bears numerous small corru- 



