
20 PHRONIMIDA. 
Fam. I1.—PHRONIMIDA. 
INFERIOR antennz 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 PHRoNiImiDEs and Purost- 
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 
PHRONIMINZ, exclusive of the genus Primno. 

