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A HISTOEY OF RECENT CEUSTACEA 



CHAPTER XXI 



ISOPODA 



Tribes. 

 Chelifera . 



Flabellifera , 



Valvifera 







Asellota 



Phreatoicidea .... 



Epicaridea .... 



Oniscoidea 



Families. 

 f Apseudidae 

 \ Tanaidae 



Anthuridas 

 Gnathiidas 

 Cirolanidas \ "g 

 Corallanidas J &, 

 Alcironidas I "o o 

 Barybrotidas f 3 bo 



Cymothoidaa / 

 Serolidae 

 Sphaeromidaa 

 \Limnoriida3 



f Arcturidas 

 \ Idoteidas 



f Asellidas 



\ Munnopsidae 



, Phreatoicidaa 



Microniscidae 



Cyproniscidae 



Dajidas 



Cabiropsidas 



Cryptoniscidaa 



Entoniscidaa 



Bopyridae 



i Ligiidae 



Tylidss 

 4 Helleriidas 



Oniscidas 

 \ Armadillididas 



Suborder 2. Isopdda. 



THE Isopoda form a vast and widely distributed army. 

 In contrast with the distinctive uniformity of the Cumacea, 

 they exhibit an extreme diversity of shape. The name was 



