STUDIES IN AUSTRALIAN CRUSTACEA— McCULLOCH. 53 



slender, and there is an additional lobe on the merus of the 

 external maxillipeds. 



Off Moreton Bay, Queensland, in eight fathoms, living upon a 

 colony of Spongodes. The colour and formation of the carapace 

 closely resemble its host, as in H. oatesii, while fragments had 

 been broken off and fastened in the hooked hairs to complete the 

 imitation. Named after Mr. J. D. Ogilby, who collected the 

 specimen. 



Halimus spinosus, Hess. 



Halimus spinosus, Hess, Arch. fur. Naturg., 1865, p. 129, pi. vi., 

 f. 1. Haswell, Proc. Linn. Soc. N. S. Wales, iv., 1880, 

 p. 434 ; and Cat. Austr. Crust, 1882, p. 6. Fulton <k 

 Grant, Proc. Roy. Soc. Vict., (n.s.), xix., 1906, p. 16. 



Halimus truncatipes, Miers., Ann. Mag. Nat. Hist., (5), iv., 1879, 

 p. 3. Fulton and Grant, loc. cit. Baker, Trans. Roy. Soc. S. 

 Austr., xxix., 1905, p. 120, pi. xxii., tig. 2, 2 a . 



Notwithstanding that both Fulton and Grant and Baker have 

 reinstated H. truncatipes, Miers, as a distinct species, I am 

 convinced that Haswell was right in including it in the synonymy 

 of the above. Miers' short description fits //. spinosus exactly, 

 as does Baker's figure and description. 



This species is characterised by the tubercles of the carapace 

 being obtusely pointed, and the lateral spines short and thick. 

 The legs are short, and the propodus of each is thick, flattened, 

 and truncate distally. This is the commonest species of the genus 

 near Sydney. 



(Since writing the above note I have received a letter from 

 Mr. Baker, who kindly compared a Sj'dney specimen of this 

 species with those he called H. truncatipes, and he agrees with 

 me that there can be no doubt of the identity of the two.) 



Halimus tumidus, Dana. 



Halimus tumidus (Dana), Baker, Trans. Roy. Soc. S. Austr., 

 xxix., 1905. p. 121, pi. xxii., f. 3. 



This species is closely allied to H. spinosus, but is readily 

 recognised by the tubercles and lateral spines of the carapace 

 being both shorter and blunter. The anterior orbital angle is 

 less spiniform, and the basal antennal process is denticulate on 

 its posterior border. 



Several specimens from Moreton Bay, the largest measuring 

 32 mm. 



