U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. 82. ART. 18 PL. 20 



Species of Pseudodiaptomus and schmackeria 



1, 3. Pseudodiaptomus richardi: 1, Fifth feet of male; 3, fifth feet of female. (After Dahl, 



2. Pseudodiaptomus pelagicus: Fifth feet of male. (After Herrick, 1887.) 

 4,5. Pseudodiaptomus salinus: 4, Fifth feet of female (after Giesbre'cht, 1896); 5, fifth feet of male 



(after Thompson and Scott, 1903.) 

 6, 7. Pseudodiaptomus stuhlmarini: 6, Fifth foot of female; 7, fifth feet of male. (After Poppe and 

 Mrazek, 1895.) 

 8. Schmackeria annandalei: Fifth feet of male. (After Sewell, 1919.) 



