ATJSTHA1IA1T MALACOSTBAOA. 287 



Genus Sphjeeoma, Latr. 

 Body oblong-oval, convex. Head broad. First segmenb of 

 the body the largest, the rest subequal, marked on the sides with 

 an oblique line indicating the coxae ; seventh segment without a 

 dorsal spine. Terminal segment of the abdomen large, convex, 

 rounded and entire at its extremity. Antennae separated at the 

 base by a small frontal process, the inner very broad at the base, 

 the outer longer. Rami of the caudal appendages oval, lamellate, 

 sub-equal. [Jf.] 



493. Sphseroma gigas. 



Sphtsroma gigas, Leach., Diet, des Sci. Nat., t. xii., p. 346 ; 

 Desmarest, Cons., p. 301 ; Milne-Edwards, Hist. Nat. des Crust., 

 t. iii., p. 205 ; Miers, Cat. Crust., N.Z., p. 110. 



Broad oblong-oval, slightly and regularly convex, nearly 

 smooth. Head small, transverse-oblong, anterior margin with a 

 very small lobe between the enlarged bases of the superior 

 antennae. First segment of the body rather the longest, the rest 

 short, subequal, slightly tending backward on the sides and with 

 the inf ero-posterior angle sub-acute. Inferior lateral margins of 

 all the segments grooved. Abdomen two-jointed, the terminal 

 joint large, convex, smooth, sub-triangular, rounded at the 

 posterior extremity. Rami of the caudal appendages narrow- 

 oval, rounded at the extremity. Colour light brown, margins of 

 segments yellowish. Length nearly 1 in. 



Australia. Found also in New Zealand, at the Falkland 

 Islands, and Cape Horn. 



494. Sphseroma Quoyana. 



Sphmroma Quoyana, Milne-Edw., Hist. Nat., t. iii., p. 206 ; 

 Heller, Eeise der Novara, Crust., p. 137. 



Body slightly granular. Last segment of the abdomen orna- 

 mented above with two longitudinal rows of four or five small 

 tubercles, and with a thick obtuse transverse crest situated above 

 its posterior extremity which is rounded. Eami of the caudal 

 appendages small, pointed and granulated, the external ramus 

 obscurely toothed on the external border. Length about 6 lines. 



Tasmania ; Sydney. I have not seen any specimens of this 

 or the following species. 



