AUSTRALIAN MALACOSTRACA. 13 



Sub-Genus Paramithrax. 

 Anterior legs in the male enlarged, hand compressed, fingers 

 with a vacant space at base between them when closed, wrist 

 with two longitudinal ridges, one on the upper and one obliquely 

 crossing the inner surface. [J] 



21. Paramithrax peronii. 



Paramithrax peronii, M.-Edw., Hist. Nat. Crust., t. i., p. 324; 

 Jacquinot et Lucas, Yoy. au Pole Sud, Zoology, iii., Crust., p. 10, 

 pi. i., fig. 3 (1853) ; Miers, Cat. Crust. N.Z., p. 5 (1876). 



Carapace hairy, covered with large smooth tubercles and with 

 spinous tubercles forming a longitudinal median series, upon the 

 gastric, cardiac, and intestinal regions. Rostrum formed of two 

 long spines. Four spines on the sides of the hepatic, and five 

 on the sides of the branchial regions. Basal joint of the 

 external antenna? terminating anteriorly in two spines, flagellum 

 not concealed beneath the rostrum. Anterior legs very large ; 

 wrist with a strong even ridge on its external surface ; hands 

 very large, smooth ; fingers acute at the extremities. Ambulatory 

 legs hairy. Length, 1\ in. ; breadth, If in. [J. $' L.~\ 



Australia (Brit. Mus). Also found in New Zealand. 



22. Paramithrax sternocostulatus. A.M. 

 Paramithrax sternocostulatits, A. Milne-Edwards. 

 Paramithrax fjaimardii, Miers, Cat. Crust. N.Z., p. 6 (1876). 

 Carapace covered with granules and tubercles beset with 



hooked hairs. Two longish spines one behind the other on the 

 gastric region, two shorter placed transversely on the cardiac 

 region ; two acute spines close together in the middle of the 

 posterior border ; a long spine directed upwards, backwards, and 

 outwards on the posterior branchial region ; two spines in front 

 on the lateral border of the branchial region ; two short teeth 

 on the hepatic region. Post-ocular spine truncate. 



Port Jackson (common). Found also in New Zealand. 



23. Paramithrax barbicornis. 



Pisa barbicornis, Latr., Encycl., x., p. Ill (1825). 



Paramithrax barbicornis, Milne-Edwards, Hist. Nat. Crust., 

 t, i., p. 324 (1831) ; Miers, Ann. Mag. Nat. Hist. (1) xvii., p. 219 

 (1876), Cat. Crust. N.Z., p. 6, pi. L, fig. 2 (1876). 



