224 A HISTORY OF RECENT CRUSTACEA 
CHAPTER XVII 
TRIBE VII.—CARIDEA 
TnE respiratory system is phyllobranchiate, that is, the 
series of branchial plumes are ‘developed in the form of 
broad foliaceous plates of extreme tenuity, attached to a 
central stalk. The first two pairs of trunk-legs are fre- 
quently but not invariably, and the last three pairs are 
never, chelate. The ova when extruded are carried at- 
tached to the pleopods of the female. 
This tribe contains four legions, the Crangoninea, 
Polycarpinea, Monocarpinea, and Haplopodinea. It cor- 
responds with the group of normal phyllobranchiate 
Macrura of Spence Bate, to which he assigns four tribes 
of the same extent as the four legions just named. 
Something like the Grecian bend, at one time fashion- 
able in feminine gait and costume, is often conspicuous in 
the species of this tribe. To this may be attributed the 
title eukyphota, meaning the well-beut animals, applied 
by Dr. Boas to a group in which he includes the genera 
Palemon, Palceemonetes, Pontonia, Hippolyte, Pandalus, 
Alpheus, Caridina, Crangon, Pasiphcea, all of them members 
of the present tribe. 
Legion 1.—Crangoninea. 
The first. pair of trunk-legs is subchelate, the second 
feeble or imperfect, with the fifth joint not subdivided. 
Family—Crangonide. 
This being the only family might be content with the 
characters of the legion, but others are added for conveni- 
ence of comparison with those in families of the next 
