OSTKACODA. 



425 



hering foot. The appendage of the seventh pair is always elongated 

 to the form of a leg ; in Cythera it is formed like the preceding one, 



A' 



F" 



FlO. 33C. Cypridlna mediterranco. a, Female ; b, male. M, Stomach ; H. heart ; 



adductor muscle ; O, eye ; O', unpaired eye ; G, brain ; Sfz, frontal organ ; T, testis ; 

 P, copulatory organ ; AM/, mandibular palp; 3fx', first maxilla; AIx 1 ', second maxilla ; 

 Fu, caudal fork. 



but in Cypris it is curved upwards, and is furnished with a short 

 claw and terminal setse. It has probably the same function (Putzfuss) 



