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' 



Fiff. 336. Cypridina mediferranea. a, Female ; 5, male. M, Stomach ; IT. heart ; SM, 

 adductor muscle ; O, eye ; &, unpaired eye ; G, brain ; Stz, frontal organ ; T, testis ; 

 P, copulatory organ; MJf, mandibular palp; MX', first maxilla ; Mx 1 ', second maxilla ; 

 Fu, caudal fork. 



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

 claw and terminal setae. It has probably the same function (Putzf uss) 



