20 PHRONIMlDiE. 



Fam. II.— PHRONIMID^. 



Inferior antennas obsolete, in one sex at least. Organs 

 of the mouth rudimentary. Third pair of pereiopoda 

 developed more or less perfectly into a prehensile 

 organ. 



This family corresponds with that of Dana, except 

 that it does not include the genus Phorcus. It is divided 

 into two sub-families, the Phronimides and Phrosi- 

 NiDES, the former only of which has, as yet, been included 

 in the Fauna of Great Britain. 



Subfamily— PHRONIMIDES. 



Three posterior pairs of caudal appendages, biramose 

 rami lanceolate. 



This subfamily corresponds with Dana's division 

 Phronimin^, exclusive of the genus Primno. 



