ANATOilY AND METAMORPHOSIS OF CYCLOPS. 



235 



b. Around the mouth the three pairs of appendages are 

 an'anged. 



1. The first pair {A), which become the first antennae 

 of the adult, are the smallest, and consist of three setose 

 joints. 



Fig. 127. 



Fig. 127. — Nauplins of Canthocamptus Staphj-liniis, magnified five 

 hundred and seventy-five diameters. (From Hoek, Ent. cler Entomo- 

 straken. Xiederl. Arch. lY.) 



A. First antennae. An. Second antennae. «. Anus. en. Endopodite. 

 ex. Exopodite. L. Labrum. M. Mandible, o. Ocellus, s. Stomach. 



2. The second pair (Aii), which become the second 

 antennae of the adult, are much larffer, and are the main 



organs of locomotion. 



Each consists of a large setose 



