AUSTBALIAN MALACOSTEACA. 87 



angle not conspicuous. Antero-lateral margin three-toothed, 

 teeth not carinated, the last spinous, separated by a slight 

 interval from the second. Anterior legs nearly as in the pre- 

 ceding species, but the second elevation on the upper border of 

 the arm inconspicuous, and the tooth on the wrist more prominent 

 and acute ; ambulatory legs , with fewer and shorter hairs. 

 Carapace with about twenty red spots. Length fths inch ; 

 breadth 7/16ths. 



Off Holborn Island, Port Denison, 20 fath. 



Sub-Tribe . Catametopa or G-rapsoidea. 

 Carapace broad in front, often sub-quadrate, sometimes sub- 

 globose, transverse or arcuate anteriorly, never rostrate. Branchiae 

 usually fewer than nine in number. Epistome very short, often 

 almost linear. Efferent channel as in the Oxyrhyncha. Fourth 

 joint of the external maxillipedes inserted at the apex or at the 

 antero- external angle of the third joint. Male genital appen- 

 dages either inserted in the sternum itself, or in the basal joint 

 of the last pair of legs, thence lying in a channel in the 

 sternum. [_Z?.] 



Family I. MAGBOPKTSALMIBM. 

 Carapace subquadrate, generally transverse, broadest in front, 

 with the anterior angles acute, the sides not arcuate. Eyes not 

 shorter than one-third of the width of the carapace. Internal 

 antennse transverse, or longitudinal. Third joint of the external 

 maxillipedes never marked with an oblique piliferous crest. 

 Second joint of the abdomen in the male narrower than the 

 adjacent part of the sternum. [D.] 



Sub- Family Macrophthalmince. 

 Internal antennse transverse, placed beneath the front. External 

 antennse applied to the base of the front. Fourth joint of the 

 external antennas not concealed. [Z>.] 



G-enus Maceophthalmtts, Latr. 

 Carapace broad, transversely rectangular. Front very narrow. 

 Eyes very long. Third joint of the external maxillipedes much 

 shorter than the second. Chelipedes not twice the length of the 

 carapace. 



