AUSTRALIAN MALACOSTRACA. 115 



of these two species may be Riippell's Hymenosoma Ma thai, I 

 am unable to form an opinion the " Krabben des Roth en 

 Meeres " not being here obtainable. 



210 Hymenosoma australe. Plate iii., fig. 2. A.M. 



Hymenosoma australe, Haswell, 1. c. 



Carapace sub-orbiculate, the length (exclusive of the rostrum) 

 a little less than the greatest breadth. Rostrum prominent, 

 deflexed, its upper surface concave from side to side, bordered 

 laterally by a raised ridge, which terminates near the extremity 

 in a slight enlargment ; extremity in the form of an obtuse 

 angle. Lateral borders of the carapace with two obscure teeth. 

 Chelipedes of the male extremely large ; propodos dilated, 

 smooth, rather sharp-edged below ; lingers gaping at the base, 

 with a projecting pulvinus. Chelipedes of female small ; hand 

 not dilated ; fingers straight. Length in. 



AVilliamstown, Port Philip. 



211. Hymenosoma varium. A.M. 



Hymenicus varias, Dana, U. S. Explor. Exped., Crust, i., 

 p. 387, pi. xxiv., fig. 9 (1852) ; Miers, Cat. Crust. N.Z., p. 50 

 (1876). 



Carapace smooth ; naked, flat, nearly orbiculate, or ovato- 

 orbiculate, very slightly wider than long, front projecting and 

 trilobate. Antero- lateral margin with two obsolescent teeth. 

 Abdomen of male narrow oblong, sub-triangular, first segment 

 broadest and triangulate on either side, penultimate narrower 

 than preceding, last oblong sub-triangular, rounded at apex. 

 Anterior feet of moderate size, eight following very slender, 

 nearly or quite naked. Colour various, greenish black, mottled, 

 or dirty white or greyish. Length 2 to 3 lines. [Dana.] 



Port Stephens ; Port Jackson ; Port Western ; Tasmania 

 (north coast). Also found in New Zealand. 



212. Hymenosoma Krefftii. 



Hymenicus Krefftii, Hess, Archiv fur Natnrg., Band xxxi., 

 p. 141, pi. vi., fig. 5 (1865). 



Carapace round, perfectly even and flat, produced anteriorly 

 into a sharp trifid rostrum. Lateral borders sharp, smooth, 



