262 



CRUSTACEA. 



I i . Il'O.— Three later larval stages of Lucifer (after Brooks). A, younger Mysis- or Schizopod- 

 like stage. /;, older Mysis- or Sckizopod-like stage less highly magnified. C, Maatigopua 

 stage, a', first antenna j a", second antenna; ab,-n& fi , the six pleopoda; c, cephalo-thoracic 

 shield; dr, antenna] gland; en, flagellnm, and ex, scale of the second antenna; md, 

 mandible ; vif, first maxillipede ; m/", second maxillipede ; mx', first maxilla ; mx", second 

 maxilla; o, compound eye; oc, Nauplius eye; ol, upper lip; r, rostrum; 1-6, six abdominal 

 MgaMBjts, 



