BY F. E. GRANT AND ALLAN B. McCULLOCH. 1 5 



Pilumnus TERRiE-REGiN^E Haswell. (Plate i. figs.l-la), 



1882. Haswell, Proc. Linn. Soc. N. S. Wales, Vol.vi. p.752. 

 1882. ,, Cat. Aust. Crust, p.68, pl.i. fig.5. 



Mast Head Islam! and Port Curtis. 



As the figure of this species which has already appeared is in 

 our opinion scarcely adequate for its reidentification, we now 

 submit further drawings taken from the type in the Australian 

 Museum. 



The largest specimen in our collection (which is very much 

 larger than the type) has the following measurements : — 



Breadth of carapace. 15mm. 



Length of carapace 12 mm. 



Pilumnus spinicarpus, sp.nov. (Plate i. figs.2-2«). 



P. cursor Haswell, Cat. Aust. Crust., 1882, p. 67; Caiman, Trans. 

 Linn. Soc. Lond. (2) Zool. viii. 1900, p. 15, in part (nee. P. 

 cur so?- A. M. Edw.). 



Anterior portion of carapace carrying scattered stiff hairs 

 which are replaced posteriorly by a scant pubescence. Beneath 

 this the surface is quite smooth. 



The front part of the carapace anterior to the lateral angles is 

 strongly convex in an antero-posterior direction, while the 

 posterior part is flat. From side to side the surface is much less 

 convex. 



The frontal region is divided into two lobes by a shallow 

 median incision, each lobe carrying a longish tuft of hairs. The 

 inner orbital angles are ill-defined. The orbits are somewhat 

 long for the genus and have a sinuate upper margin which is 

 sparingly granulose, and has no well defined fissures. 



The antero-lateral margin, which is regularly arched, is shorter 

 than the postero-lateral, and bears three equal and equidistant 

 spiniform teeth, the first situated at some distance from the 

 nonspinulose outer orbital angle, and the posterior forming the 

 lateral angle. 



The postero-lateral margins are onl}' slightly inclined, giving 

 to the posterior margin a width equivalent to that between the 

 outer orbital angles. 



