A REVIEW OF THE MYSIDACEA 



77 



Antennal scale (fig. 20, a) extending forward as far as the distal 

 end of the antennular peduncle, 314 times as long as broad, terminal 

 lobe broader than long, extending slightly beyond the spine of the 

 outer margin, apex of the lobe marked off by a distinct suture. 



Figure 20. — Siriella panamensis, new species: a, Antennal scale, X 67}£; b, endopod of 

 third thoracic limb, X 45; c, endopod of eighth thoracic limb, X 45; d, third pleopod of 

 male, X 45; e, fourth pleopod of male, X 45;/, telson, X 90; g, uropods, X 67J4. 



Endopod (fig. 20, b) of the third to the seventh thoracic limbs with 

 the carpus distinct and the propodus undivided, the carpus about one- 

 quarter of the propodus, nail about half as long as the combined length 

 of the carpus and propodus. Endopod of the eighth thoracic limbs 

 (fig. 20, c) shorter and more robust than that of the remaining limbs, 

 but of similar form. 



