THE ARTHROPODA 



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by the addition of two more segments, making ten in all, 

 of which the first seven bear limbs in a more or less developed 

 condition. The Hmbs of the first five pairs have developed 

 exites as well as endites, and begin to resemble the typical 

 limbs of the adult. The second maxillae are represented by 



Fig. 24 



A. Lateral view of the metanauplius larva of Apus cancri/orTiiis , B. The same larva 

 seen from the ventral surface. C. Ventral view of a larva after the first ecdysis. D, 

 Ventral view of a larva after the third ecdysis. E. A single thoracic limb of a larva 

 of the same age as that shown at D. AH the figures after Claus. /, the first 

 antenuce ; 2, the second antennas; 3, the mandibles; ag-, antennary gland, the 

 provisional excretory organ of the larva ; an, anus ; ir, bract ; e, eye ; en, endites ; 

 ;?, flabellum ; /o, frontal organ ; th, thoracic segments. 



a pair of minute outgrowths lying just behind the rudiments 

 of the first maxilte. The biting process of the mandible is 

 larger and stronger, and its inner edge is furnished with two 



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