STUDIES IN AUSTRALIAN CRUSTACKA — McCULLOCH. 327 



Naxia aurita, Latreille. 



Pisa aurita, Latreille, Encycl. Metli., Entoni., x., 1825, p. 140. 



Halimus auritus, Milne Edwards, Hist. Nat. Orust., i., 1834, 

 p. 341, and Atlas, Cuv. Regne Anim., 1849, pi. xxviii., fig. 

 3, 3 a-b. Id., Kinahan, Journ. Roy. Dublin Soc., i., 1858, 

 p. I Id., Ortmann, Zool. Jahrb., vii., 1893, p. 39. 



Halimus Icevis, Haswell, Proc. Linn. Soc. N. S. Wales, iv., 1880, 

 p. 435, and Cat. Austr. Crust., 1882, p. 6. Id., Baker, 

 Trans. Roy. Soc. S. Austr., xxix., 1905, p. 119, pi. xxi., 

 fig. 1-la. Id., McCulloch, Rec. Austr. Mus., vii., 1908, 

 p. 54. 



The third edition of Cuvier's " Regne Animal " not being 

 available to me, I am indebted to Dr. W. T. Caiman for a 

 photograph of the plate on which this species is figured. I have 

 compared specimens of Halimus Icevis with it and am convinced 

 that that species is svnonymous with H. auritus. As in other 

 species of the genus there is some variation in the breadth of 

 the carapace and the length of the legs, though I have not seen 

 any examples in which the rostral horns are formed exactly 

 as in the figure, they being generally slightly longer and more 

 divergent. Haswell considered that his species differed from 

 H. auritus in the size of the chelipeds, but I have specimens of 

 H. Icevis with these limbs similar to those figured by Milne 

 Edwards. 



N. aurita was originally described from D'Entrecasteaux 

 Channel, Tasmania, but Milne Edwards gave its habitat as the 

 Indian Ocean. It has been recognised by b'oth Kinahan and 

 Ortmann from Victoria, and as H. Icevis it has also been 

 recorded from South and South Western Australia. 



Naxia aries, Guerin. 



Halimus aries, Latreille in Guerin, Icon. Regne Anim., iii., 

 1829-1844, Crust., pi. ix., figs. 2, 2a-c (sine descr.). 



Halimus aries, Milne Edwards, Hist. Nat. Crust., i., 1834, p. 

 341, and Atlas, Cuv. Regne Anim., Crust., 1849, pi. xxviii., 

 figs. 2, 2a-c. 



Halimus gracilis, Baker, Trans. Roy. Soc. S. Austr., xxix., 1905, 

 p. 124, pi. xxiii., fig. 4, 4a. 



Halimus gracilis is apparently identical with H. aries ; the 

 only difference shown in Baker's and Guerin's figures is in the 



