BY F. E. GRANT AND ALLAN R. MCCULLOCH. 39 



Port Curtis. The species has already been recorded from this 

 locality by Miers (loc, cit.). 



De Man* has pointed out that Heller described, under the 

 name Porcellana inermis, a species which should properly be 

 included in the genus Pelrolisthes, but with which Has well's 

 species is not identical. As, however, the latter author's name 

 sinks to varietal rank only, it can still be used in connection 

 with this species. 



De Man has also suggested that this species may prove to be 

 synonymous with P. elonyatus M. Edw., common in New Zealand . 

 A reference to the type, however, shows it to be readily dis- 

 tinguished from that species by its much broader front. 



We agree with Miers that P. inermis Hasw., is at most but a 

 variety of P. japonicus De Haan; the points of difference, how- 

 ever, noted by that author do not prove to be constant in the 

 five specimens (including Haswell's types) which are before us. 



Petrolisthes tomentosus Dana. 



1852. Porcellana tomentosa Dana, U. S. Explor. Exped. Crust, i. 

 p.420, pi. xxvi. fig. 10. 

 Two fine specimens, one of either sex, and the larger being 

 9mm. in length, were taken on the reef at Mast Head Island 

 under stones. They differ from the original description only in 

 being densely rather than " sparingly tomentose." 



Porcellana serratifrons Stimp. 



1858. Stimpson, Proc. Acad. Nat. Sci. Philad. p.80. 

 1888. Henderson, Zool. H.M.S. "Challenger," Anomura, p.110, 

 pi xi. fig. 5. 



Mast Head Island; under rocks. 



The rugosity of the dorsum of the carapace varies within wide 

 limits, the transverse striae being in some cases faintly marked 

 and in others prominently so, but in no specimen which we have 

 examined are they absent. The spinulation of the margins also 



* Journ. Linn. Soc. London, Zool. xxii. p. 212, 1888. 



