AUSTRAL TAX MALACOSTRACA. 3 



3. Stenorhynchus brevirostris. A.M. 

 Stenorlnjnclnts brevirostris, Haswell, Proc. Linn. Soc. N.S.W., 



Yol. iii., p. 408, and Vol. iv., p. 4-32, pi. xxvii., fig. 5. 



Gastric region with five tubercles, of which four are situated 

 anteriorly in a transverse line and very small, while the fifth is 

 much larger and situated in the middle line close to the posterior 

 border of the region. Cardiac region with three tubercles, the 

 two anterior being close together in the same transverse line and 

 very large ; the third small, situated close behind them. Two 

 obscure tubercles on the lateral hepatic regions, and three on 

 the branchial. Lateral margins with two prominent triangular 

 teeth. Eostrum short, of two bluntish teeth, which do not reach 

 further forward than the distal extremity of the second joint of 

 the external antenna 1 , the furrow between them not extending so 

 far back as the line joining the posterior borders of the orbit. 

 ]N r o infra-orbital, nor supra-orbital spines. Arm with three or 

 four teeth on its upper surface ; hand carinated externally in 

 the female. 



Port Jackson ; Port Denison. 



G-enus Achjeus, Leach. 

 Rostrum very short, emarginate. 



4. Achaeus lacertosus. A.M. 

 Acliceus lacertosus, Stimpson, Proc. Acad. Nat. Sci., Phil., 



Vol. ix., p. 218 (1<S57). 



AchcBUs breviceps, Haswell, Proc. Linn. Soc. N.S.W., Vol. iv., 

 p. 133. 



Carapace triangular, regions rather prominent, surface smooth, 

 without spines, slightly pubescent. Hepatic region with a small 

 obtuse, laminiform tooth, extending horizontally. Rostrum as 

 long as broad, the extremity bilobed. External antenna? with 

 the mobile portion filiform, longer than the carapace. Peduncle 

 of the eyes smooth. Chelipedes large, shape almost as in 

 Mi/cteris, merus very stout, hand incurved, fingers compressed. 

 Ambulatory legs very slender, those of the first pair thrice the 

 length of the carapace, the third and fourth pairs with a 

 falciform dactylus. [St.] 



Port Jackson ; Port Stephens. 



