BOPYRID. 225 
ISOPODA. BOPYRID. 
NORMALLA. 
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GYGE GALATHE®. 
Male.—Cephalon roundish, nearly as broad as the first segment of the 
pereion. Pereion increasing in breadth posteriorly. Pleon decreasing in 
breadth posteriorly, last segment bifurcate. First pair of antenne short, 
three-jointed ; second pair about three times the length of the superior, and 
terminating in a small flagellum. 
Female.—Flat, oval, slightly unsymmetrical. Cephalon broad, pleon short 
and continuous with the pereion, terminal segment having a pair of pleo- 
poda (posterior pair) projecting beyond its extremity and giving a bifvrcate 
appearance to the posterior margin. Antennz rudimentary. Branchial 
appendages consisting of small sacs near the margin of the ventral surface 
of each segment of the pleon. 
Length of the male, three-twentieths of an inch. 
9 ae female, eight-twentieths _,, 
Tue male gradually increases in breadth from the head 
to the last segment of the body (pereion), from which the 
segments of the tail rapidly decrease, thus giving the 
general aspect of a long narrow animal, with a large round 
VOL. If. Q 
“al ° 4 od ot VASO “ie 
