6G T. V. HODdSON. 



I'oioiopuda aiulmlatoiy except the tirst, which is prehensile. 

 Pleopoda, the first pair forms an operculum over the remainder. 

 This genus is a member of the family >runiiida' ami prohably more nearly related 

 to Pleuroijoniuin than to Muniui. 



AUSTROSIGNUM GRANDE. 



(Plate X., fig. 1.) 

 Specific chnractere : — 



Head sraall, rounded, with eyes on long slender stalks. 



First 8C};ment of the niesosonie inucU the longest, and all scgmentfi widely separated laterally ; 

 a distinct waist Initween the fourth and fifth segments. 

 Urosonie pointed. 



The cephaloswme 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. 



Thd 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 meso.some. 



The first segment of the mesosome is nearly twice as long as tlie succeeding one 

 but of .smaller diameter, the second to the fourth are subequal in length, but the third 

 is the widest by the merest trifie. There is a distinct waist between the fourth 

 and fifth segments ; the three posterior ones are subcijual in length, decreasing 

 progressively in width and increasing in curvature. The epimora are roynded, in the 

 first segment unevenly so, and all are widely separated from each o'ther, 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 propodito, and 

 articulated to it at about half their own length iVoni 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 fiagellum is about as long as the peduncle. 



The second antenna comprises a six-jointed pcilunele, 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 .setae are .scattered throughout the 

 peduncle. The fiagellum is .scarcely as long as the last joint of tlie peduncle. 



The mouth parts are normal. 



