MUNNA. 323 
ISOPODA. ASELLIDA. 
NORMALIA. 
Genus—MUNNA. § (Kroyer.) 
Male. Elongate, sublinear. Female. Broad, ovate. 
First and seventh segments of the pereion shorter than the rest; cephalon 
very broad and large, occupying nearly one-fifth of the whole length of 
the animal. Eyes very large, fixed at the postero-lateral angles of the 
cephalon, pedunculated, immovable. Upper antenne very short; lower 
antenne very long. First pair of legs small and strong; the remainder 
very long and slender, terminated by two small ungues. Pleon having all 
the segments coalesced into a single elongate pear-shaped plate. 
Tue large size of the head, together with the very pro- 
minent, pedunculated (although not movable) eyes, which 
stand out, in the males, considerably beyond the lateral 
margin of the body, gives a very distinctive character to 
this genus; and the great length of the lower antennz 
and legs, giving the animals the appearance of one of 
the Nymphonide, at once separates it from all the 
other genera in the present family. The facets of the 
eyes are large and hexagonal; the antenne are inserted 
at a considerable distance apart (represented in our 
lower left-hand outline in the woodcut of M. Kroyeri), 
the upper pair consists of several very short joints, 
followed by a long, slender portion, which is exarticulate 
in M. Whiteana, but distinctly consists of three joints in 
M. Kréyeri; this portion is terminated by two flattened 
(and articulated ?) sete at the tip, at the base of 
which are affixed two or three very minute joints, 
observed only by us in M. Whiteana, and which constitute 
the true flagellum. The lower antennz are very long, 
Y2 
