THE OSTRACODA 



Nervous System. The supraoesophageal ganglion is largest in 

 the Cypridinidae in correlation with the presence of paired eyes in 

 that family. The ventral nerve-chain is represented by a single 



Cypridiiin mediterrunra. Female (above) and male (l>elow). One valve of shell removed to 

 show appendages and internal organs. A", antenna (the antennule is just above) ; F' (below), 

 fourth post-oral limb ; F' (above), fifth post -oral limb ; Fu, caudal furca ; G, brain : H, heart : 

 Af, mid-gut; Mdf, mandibular palp; Mjf, maxillula ; MX?', third post-oral limb (maxilla); <>, 

 ]iaired eye ; 0', median eye ; P, penis ; S.M, adductor muscle of shell ; >7r, frontal tentacle ; T, 

 testis. (From Claus's Textbook.) 



