A REVIEW OF THE MYSIDACEA 



99 



endopod 1-jointed, shorter than the first joint of the exopod; exopod 

 composed of six joints terminating in two long setae. 



Third pair of pleopods of the male (fig. 30, c) stout, sympod four 

 times as long as broad; endopod 1-jointed; exopod almost twice as 



Figure 30. — Gaslrosaccus mexicanus, new species: a, First pleopod of male, X 63; i, second 

 pleopod of male, X 63; c, third pleopod of male, X 63; d, fourth pleopod of male, X 63; 

 e, fifth pleopod of male, X 63;/, uropods, X 48; g, telson, X 63. 



long as the sympod and profoundly and curiously modified in a man- 

 ner that can best be described by a figure. 



Fourth and fifth pairs of pleopods (figs. 30, d-e) of the male simi- 

 lar; endopod 1-jointed; exopod 3- or 4-jointed. 



Length of adult specimen 7 mm. 



