Sfvod- chamber 



J>/yesf/ye tract 

 Abdominal processes **^ 



Abdominal setae — 



Heart 



Abdominal cfav/S^ * 



I 

 $ 

 I 



post- abdomen 



Mandfbtd 



Antenna 



Hepatic caeca 



1—1 Compound eye 



'"•Oce//(/« 



^Arrtennvl^! 



^ItQbnjffn 



rrofttal organ 

 ^tiedian eye 

 ^'Isf antenna 

 ^"^Po/red eyes 

 ^g.<i antenna 



'^Caudal sfy/ats 



Fig. 134. — Representatives of the class Crustacea, phylum Arthropoda. Above, 

 The water flea [Daphnia pulex). Below, The fairy shrimp {Branchinecta pack- 

 ardii) , lateral view of female showing appendages and uterus filled with eggs; 

 left, anterior view of a male showing the second antennae modified as clasping 

 organs. (From Curtis and Guthrie: Textbook of General Zoology, published by 

 John Wiley & Sons, Inc.) 



Fig. 135. — A, Peripatus sp., an arthropod of the class Onychophora, with sev- 

 eral annelid characters; B, a millipede of the class Diplopoda, phylum Arthro- 



_r ii- - _i /^7- .•; 



