A REVIEW OF THE MYSIDACEA 



87 



Telson (fig. 23, c) as long as the sixth abdominal somite, two and 

 a quarter times as long as broad at the base; cleft for one-sixth of 

 its length, the cleft armed with serrations; lateral margins armed 

 with 9 or 10 spines; each lobe of the apex armed with two closely 

 placed, long powerful spines about one-sixth of the telson in length. 



Figure 23. — Archaeomysis maculata (Holmes): a, Anterior end of young male showing 

 rostral plate, antennules, an.ennal peduncle, and scale, X 78; b, uropod, X 78; c, telson, 

 X 78: d, third thoracic limb, X 62. 



Uropods (fig. 23, b) subequal in length, one-sixth longer than the 

 telson; inner uropod with eight rather stout, widely spaced spines 

 on the inner margin; outer uropod with 22 closely set spines on the 

 distal three-quarters of the outer margin. 



893476—61 7 



