260 



CRUSTACEA. 



The completely developed limbs are the same as those of the 

 Protozoaea stage, but behind these we find that the third maxilli- 

 pede {mf") and the four anterior ambulatory limbs (tl^-th*) havej 

 appeared as small biramose rudiments. Besides these, rudiments of I 



E 



Fio. 119.— Protozoaeac and Zoaea of Lucifer (after Brooks). A, first Protozoaea stage. B, first 

 maxilla of the same. C, second maxilla of the same. D, later Protozoaea stage ( Erichthina). 

 /:, Zoaea stage, a', first antenna; a", second antenna; ab c , sixth pair of pleopoda (lateral 

 tidal I'm); en, endopodite; ex, exopodite ; h, heart; /, hepatic outgrowths ; 

 , mandible; mf, first maxillipede ; mf", second maxillipede ; m/'", third maxillipede; 

 vip, protopodite of the third pair of maxillipedes ; mx', first maxilla ; mx", second maxilla ; 

 o, paired C< e ; oc, Nauplius eye ; ol, upper lip ; r, rostrum ; tM-th*, rudiments of 



tm- first four pain of ambulatory limbs; fi-t*, the four segments carrying ambulatory 

 limbs; 1-C, tb^ lis abdominal segments. 



