AUSTRALIAN MALACOSTEACA. 289 



498. Sphaeroma aspera. 



Sphceroma aspera, Haswell, 1. c, p. 472, pi. xvi., fig. 3. 



Body covered with larger and smaller granules. Head 

 transverse, rounded in front, with a narrow lobe between the 

 bases of the antenna? ; first segment of the thorax as broad as 

 the four following; a slight depressed line marking off the 

 epimera. First segment of the abdomen with distinct lines 

 marking the position of the coalesced segments, a prominent 

 tubercle on the posterior margin on either side of the middle 

 line. Last abdominal segment sub-triangular in contour, dilated 

 anteriorly and ornamented with two slightly convergent irregular 

 rows of minute tubercles ; the apex rounded, with a rectangular 

 notch on either side near the extremity. Caudal appendages 

 with the rami rather unequal, the outer the smaller, both broad, 

 sub-acute. Inner antenna? very broad at the base ; flagellum 

 with twelve segments. Outer antenna? equalling the inner in 

 length ; flagellum with eight segments. Length ^ in. 



Port Jackson. 



G-enus Cymodocea, Leach. 



Moderately convex, slightly widening posteriorly. Head 

 transverse, with a small median frontal lobe. Eyes small, lateral, 

 situated on a lobe which is received into a corresponding exca- 

 vation in the front margin of the first thoracic segment. Seg- 

 ments of the thorax short. Abdomen two- jointed ; terminal 

 segment tuberculate or rugose above, posterior margin notched 

 with a median lobe in the centre of the notch. Caudal appen- 

 dages thick, usually short; rami equal, or rather unequal. \_M.~] 



499. Cymodocea granulata. 



Cymodocea grcmwlata, Miers, Ann. Mag. Nat. Hist. (Ser. 4), 

 xvii., p. 229 (i87G) ; Cat. Crust. N.Z., p. 114, pi. iii., fig. 5. 



Moderately convex, nearly smooth. Head small ; frontal lobe 

 very small, obtuse. Lateral margins of the segments of the 

 thorax all with a narrow marginal line, with the postero-lateral 

 angles acute. Antero-lateral lobe of the first segment of the 

 thorax narrow-triangulate, acute, produced forward beneath and 

 beyond the eyes. Postero-lateral lobe of the last segment of 

 the thorax produced backward, and terminating in a short spine 



