6G 
T. V. HODGSON. 
Pereiopoda ambulatory except the first, which is prehensile. 
Pleopoda, the first pair forms an operculum over the remainder. 
This genus is a member of the family Munnidse and probably more nearly related 
to Pleurogonium than to Manna. 
Austrosignum grande. 
(Plate X., fig. 1.) 
Specific characters:— 
Head small, rounded, with eyes on long slender stalks. 
First segment of the mesosome much the longest, and all segments widely separated laterally ; 
a distinct waist between the fourth and fifth segments. 
Urosome pointed. 
The cephalosome is small, rounded in front ; it rests in a crescentic depression of 
the first segment of the mesosome which arches forwards on either side to receive it 
and is more than twice its diameter. 
The eye scarcely appears to be well developed ; it lies at the extremity of a long, 
slender peduncle which arises from the postero-lateral angle of the cephalosome. The 
peduncles very nearly attain the width of the first segment of the mesosome. 
The first segment of the mesosome is nearly twice as long as the succeeding one 
but of smaller diameter, the second to the fourth are subequal in length, but the third 
is the widest by the merest trifle. There is a distinct waist between the fourth 
and fifth segments ; the three posterior ones are subequal in length, decreasing 
progressively in width and increasing in curvature. The epimera are rounded, in the 
first segment unevenly so, and all are widely separated from each other, elongated, 
and not distinct from their respective segments. 
The metasome comprises one very small segment wedged in the curvature of the 
preceding one, and a urosome which is ovoid in shape but having a slightly truncated 
extremity. 
The uropoda are very small ; they are situated at some little distance from the 
extremity, and comprise a comparatively stout pointed joint or propodite, and 
articulated to it at about half their own length from the extremity are two minute 
joints. 
The first antenna comprises a two-jointed peduncle, both joints are comparatively 
long, the second being the longer ; the flagellum is about as long as the peduncle. 
The second antenna comprises a six-jointed peduncle, the first two joints of which 
are short and stout; the third is very nearly twice as long and more slender; the fourth 
is shorter than the preceding, curved to form the bend in the appendage, the other 
two are slender and as 2 to 2*5 in length ; a few setse are scattered throughout the 
peduncle. The flagellum is scarcely as long as the last joint of the peduncle. 
The mouth parts are normal. 
