64 AUSTBALIAN MALACOSTKACA. 



legs unequal and rugose; larger hand as it were corroded 

 externally, smaller nearly smooth. Ambulatory legs tomentose. 

 Port Denison, etc. Pound also in the Indian Archipelago 

 and New Caledonia. 



107. Ozius gutrtatus. A.M. 

 Ozius guttatus, M.-Edw., Hist. Nat. Crust., t. i., p. 406; 



A. M.-Edw., Nouv. Arch, du Mus., t. ix., p. 239, pi. xi., fig. 1. 



Carapace oval, little convex, smooth above. A transverse 

 slightly granular line extending from the fourth lateral tooth, 

 and directed towards the gastric region. G-astric region traversed 

 longitudinally by two shallow grooves which limit the urogastric 

 lobe. Antero-lateral borders divided into five dentiform lobes, 

 which are not very prominent, the last much the smallest and 

 sometimes absent. Front slightly bi-marginated and divided 

 into four flattened obtuse and deflexed teeth, separated by broad 

 clefts. Anterior legs thick and nearly smooth, Ambulatory 

 legs tomentose towards their extremity. 



Port Denison ; Port Curtis. 



108. Ozius sp. A.M. 

 Carapace oval, nearly smooth, slightly granular anteriorly. 



Pront obscurely four-lobed. Antero-lateral margins almost 

 entire, divided by three very obscure fissures. Anterior legs 

 unequal, the larger hand smooth, swollen, mobile finger with a 

 large rounded tooth at the base, immobile finger with two larger 

 rounded and several smaller ones ; smaller hand slightly rough- 

 ened externally, fingers slender, armed with a few minute acute 

 teeth. Breadth of carapace 15/16ths inch ; length 9/16ths inch. 



Port Denison. 



This species resembles O. frontalis of Milne-Edwards, but 

 there is no transverse groove on the front besides that which 

 separates the two margins characteristic of the genus. 



Genus Piltjmnits, Leach. 



Carapace thick, convex, slightly broader than long, front 



inclined. Antero-lateral margin shorter than the postero-lateral, 



dentate. Orbits often denticulated. Basal joint of the external 



antennae short, not quite reaching to the front, flagellum entering 



