AUSTRALIAN MAIACOSTRACA. 7 



surface, and three or four smaller ones further back ; wrist very 

 strongly carinated ; hand very large, swollen, smooth, with two 

 or three very small fasciculi of hairs ; fingers meeting only at 

 their tips when closed. Posterior limbs with the penultimate 

 joint compressed, but not truncate. 

 Tasmania ; King G-eorge's Sound (Macleay Museum). 



Sub-G-enus Microhalimus, Haswell. 

 Nearly allied to Halimus, but distinguished by its small size, 

 by having the rostrum strongly deflexed, and by having no 

 prominent spines on the carapace. 



11. Microhalimus deflexifrons. A.M. 



Microhalimus deflexifrons, Haswell, Proc. Linn. Soc. ]N~.S.~W\, 

 Vol. iv., p. 435, pi. xxv., fig 2. 



Carapace nearly smooth; lateral margins with three very 

 minute spines on the hepatic regions, three others on the 

 branchials, a minute point towards the middle of the latter 

 region, and another in the middle of the posterior border. 

 Gastric region very prominent, with two small tubercles in front 

 opposite the eyes. Rostrum obliquely deflexed, cornua slender, 

 acute. Basal joint of external antennae with an acute spine at 

 its antero-external angle. Anterior limbs small in the female, 

 larger in the male, the wrist in the latter sex with a denticulated 

 carina, the immobile finger with a stout tooth. Penultimate 

 joint of ambulatory limbs very slightly dilated and compressed. 

 Carapace and limbs covered with hooked hairs. 



Port Jackson. 



Sub-Family Acanihonychince. 

 Eyes small and immobile or partially retractile, and concealed 

 beneath the prominent pra>ocular spine. Basal antennal joint 

 usually enlarged at base and narrowing distally. Post-ocular 

 spine small or absent. [Jf.] 



Genus Xenocakctnus, White. 

 Carapace ovate-cylindrical. Eostrum elongated, emarginate. 

 Prae-ocular spine wanting. Eyes immobile. Antennae concealed 

 beneath the rostrum. Last two pairs of legs very short. 



