MUNNA. 323 



1SOPODA . A SELLIDM. 



NORM ALT A. 



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 antennae very short; lower 

 antennae 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. 



THE 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 antennas 

 and legs, giving the animals the appearance of one of 

 the Nymphonida, at once separates it from all the 

 other genera in the present family. The facets of the 

 eyes are large and hexagonal ; the antennae 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. Krbyeri; this portion is terminated by two flattened 

 (and articulated ?) setae 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 antennae are very long, 



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