234 BOPYRID®. 
TSOPODA BOPYRIDA. 
NORMALIA. 

PHRYXUS ABDOMINALIS. 
Male.—Upper antenne very short, three-jointed; second antennz eight- 
jointed, gradually attenuated to the tip. Oblong, subdepressed, with the 
pleon produced into a short blunt point. 
Female.—Subglobose, very unsymmetrical, with the pereipoda on one side 
of the body almost obsolete. Pleon furnished on each side with four large 
oblong-ovate fleshy lobes; terminal segment minute. 
Length of male, one-tenth, of female, one-quarter, of an inch. 
Bopyrus abdominalis. Kroyer, Natur. hist. Tidsk. iii. p. 102—, 289, pl. 1, 2 
(1840); Voy. Scandinay. Crust. rl. 29, fig. 1. 
Phryxus Hippolytes. Ratuxe, in Nova Acta Acad., Nat. Curios., xx. p. 40, 
tab. 2. figs. 1—10. Wuurn, Pop. Hist. Brit. Crust. 
fig. 257, pl. xiv. fig. a, male; b, female (1843). 
Tue male of this species is extremely minute, and is 
generally to be found partially immersed between the folds 
of the posterior part of the body of the female. The 
head is transversely ovate, with both pairs of antenne 
visible in front. 
