41 



Genus Marshia^, gen. no v. • 



Allied with Attheyella. Inner branch of first foot 3-jointed, scar- 

 cely elongated, barely sub-prehensile. 



Second and third feet with outer rami 2-jointed, short. Fourth 

 foot with outer ramus 1 -jointed. Fifth feet 1 -jointed. Antennae 

 6-jointed, the fourth joint with a slender hyaline process longer than 

 the end of the antennae. Antennule without obvious palpus , prehen- 

 sile. Mandi blar palp simple (?). First foot-jaw with a uniciliate tu- 

 bercle-like palp. Second foot-jaw with a long claw-like apical joint. 

 Antennae of the male strongly modified. Fresh or brackish waters of 

 the Rio Grande valley. 



Marshia albuque?'quensis n. sp. 

 (Figures 1 — 11.) 

 Body with ten obvious segments , having the aspect of Cantho- 

 camptus. Antennae short, 6-jointed. The proximal joint enlarged 



Fig. 1. Fig. 2. Fig. 3. Fig. 4. 



Fig. 6. 



Fig. 1. Caudal stylet of Marshia albuquerquensis , Q. 



Fig. 2. Antenna of female. 



Fig. 3. Antennule. 



Fig. 4. Feet of right and left sides of a female, the right foot anomalous. 



Fig. 5. Anterior foot-jaw. 



Fig. 6. Posterior foot-jaw. 



Fig. 7. Mandible. 



Fig. 8. Fifth foot of male. 



1 In compliment to Professor C. Dwight Marsh of Ripon, Wisconsin. 



