ANOMURA 



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of the intermediate segments of the abdomen are serrated. The 

 telson is slightly cleft (a condition which reappears in the Brachyura) 

 and is armed on each side with six setae. The first antennae (a!) 

 are simple and unjointed processes with setae at their tips. In the 

 second antenna (a"), the unjointed endopodite is still continuous with 

 the protopodite, while the small exopodite with setae on its inner 

 side is already separated. The mandible has no palp. Behind the 

 two pairs of maxillae there are two pairs of biramose swimming 

 maxillipedes ^/', mf"\ while the third pair (Fig. 133 C) is to be 



A 



i 



FIG. 133. Larval stages of Eitpagurus Bernhardus (after G. O. SARS). A, Zoaea (dorsal view). 

 /;, Metazoaca (side view). C, ventral view of the segment carrying the third maxillipedes in 

 the Zoaea. D, caudal fin of the Metazoaea. a', first antenna; a", second antenna ; a.5, rudi- 

 ment of the fifth pleopod ; a 6 , the sixth pleopod (uropod); mf, mf", mf", the three 

 maxillipedes ; pi-plf, the first four ambulatory limbs ; /;, gill-rudiments ; ol, upper lip ; 

 t, mandibular palp ; r, rostrum. 



found only in the form of a very small two-jointed appendage pressed 

 against the ventral surface. The five pairs of ambulatory limbs and 

 the rudiments of the pleopoda are still altogether wanting. 



In a later stage, known as the Metazoaea (Fig. 133 J3), which 

 still resembles the Zoaea in appearance, the rudiment of the third 

 maxillipede (mf") has developed further. It has a two-jointed 

 exopodite beset with setae, which, like the exopodites of the pre- 

 ceding maxillipedes, functions for swimming, while the indistinctly 



