136 BULLETIN r,4, UNITED STATES NATIONAL MUSEUM. 



F,.; IIS-HATHYNOMUS GIGANTEU8 (AFTER EDWARDS AND BOUVIER). «, LEFT ANTERIOR PI.EOPCD 

 , VKNTFM -n.K, /, EXTREMITY OF BRANCHIAL TUFT. C, LEFT ANTERIOR PI.EOPOD (DORSAL SIDE). 

 ,,, ClRCrLATKm IN RESPIRATORY ENDOPODITE. C, LEFT UROPOD (INFERIOR SIDE). /• L^^^J'"^';;°" 

 OF THIRD PAIR WITH THE TRUNKS OF THE ORIGIN OF THE BRANCHIAL TUFTS. </, POSTERIOR LEFT 

 PLEOPOD (ANTERIOR SIDE). /(, THE SAME (POSTERIOR SIDE). 



