380 A HISTORY OF RECENT CRUSTACEA 
are short, robust, and subprehensile, of the following pairs 
ambulatory, very long, with the seventh joint bifid. The 
anterior pleopods are arranged as in Janira. The uropods 
are minute, seemingly single-jointed. ‘l'wo British species 
have been described, Munna Kriyeri, Goodsir, and Munna 
Whiteana, Bate and Westwood, but Sars decides that the 
former is male, the latter female, of one and the same 
species, so that the name Whiteana must be cancelled. 
The type is Munna Boeckw, Kroyer. ‘The species are very 
small, and the differences such as are not always very easy 
to seize when exhibited on so minute a scale. There are 
three other Norwegian species, Munna Fabricn, Kroyer, 
Munna limicéla, Sars, and Munna palmata, Lilljeborg, the 
last distinguished by its enormously developed first pair of 
feet. Of the Munna Fabricii, Sars remarks that Kroyer 
himself mixed up several species in his description and 
figures under this name. Beddard describes two species 
from Kerguelen, Munna pallida and Munna maculata. 
Chilton describes Munna neozelanica from New Zealand, 
a species in which the first gnathopods of the adult male 
have a very remarkable form, with the second joint small, 
the third ‘very thick and strong, hollowed anteriorly to 
receive the distal end of the limb when bent back ; carpus 
expanding distally, mallet-shaped; propodos small and 
rounded.’ 
Paramunna, Sars, 1866, has exceedingly prominent 
eyes, the mandibular ‘ palp ’ short and thick, three-jointed, 
the last three segments of the pereeon narrow and armed 
with acute laterai processes. The uropods are very short, 
simple, biarticulate. The genus is intermediate between 
Munna and Pleurogonium. The type, Paramunna bilobata, 
has the head divided in front into two truncate lobes. It 
is a sixteenth of an inch long. 
Pleurogonium, Sars, 1871, is a change of name from 
Pleuracantha, Sars, 1864, said to be preoccupied. It has 
some or all of the segments of the perzeon laterally spini- 
ferous, the anterior four being also acuminate. The pleon 
forms a single piece constricted at the base with the apex 
obtusely pointed. There are no eyes. The mandibles 
