175 



carpus is rounded above; its surface, like the upper surface 

 of the palm, is strongly reticulate, caused by anastomosing 

 strings of densely-packed granules and pits ; there is a small 

 tubercle on the inner angle. The palm is moderately com- 

 pressed, rounded externally, and abruptly declivous and 

 smooth internally, carinate above and below. The fingers 

 are strongly compressed and carinate, the immobile one is 

 strongly toothed, the mobile one less so, there is a small hiatus 

 between them, they are slightly hooked, and not excavated at 

 the tips. 



The ambulatory legs are much shorter than the chelipeds, 

 the joints much compressed, expanded, and carinate, the meri 

 are trigonous, the dactyli are straight, five or six carinate 

 strongly, with the claws sharp and slightly curved. 



Length of carapace, 20 mm. 



Breadth ,, ,, 26 mm. 



Length of cheliped, 25 mm. 

 ,, ,, first leg, 21 mm. 



Males only, from Port Willunga, Mr. AV. J. Kimber, Port 

 Lincoln. 



C.(? ) punctatus, Haswell, which does not bear a detailed 

 description, differs from the present species in the following 

 points : — The carapace is more convex and polished, with the 

 regions more strongly defined ; the front and antero-lateral 

 margins are much thicker and not cristate, and there are no 

 incisions on the outer ends of the front : this also projects 

 rather more, and is slightly pointed. An oblique and sinuous 

 groove extending from the second antero-lateral notch across 

 to the strong depression behind the gastric region is well- 

 marked. The posterior margin is thickened, without being 

 sharply defined. The subocular regions are nearly smooth ; 

 the sternal plastron much more deeply pitted. The merus of 

 the external maxillipeds is about one-third the length of the 

 ischium, with the distal mar,^in much more oblique : the 

 merus also is nearly smooth, marked with a narrow pit exter- 

 nally. The groove of the ischium is nearly obsolete. The 

 chelipeds are nearly smooth in comparison, and not carinate. 

 The ambulatory legs are scarcely compressed, and non-cari- 

 nate, while the dactyli are sub-cylindrical, being marked with 

 longitLidinal lines of pits, the interspaces between which, how- 

 ever, may assume a carinate form. 



I agree with Messrs. Fulton and Grant (Proc. Roy. Soc. 

 Victoria, 19 N.S., pt. i., p. 6) that this species should not be 

 retained in the genus Cycloxanthus, but am unable to agree 

 that its place is in Lioxantho, Alcock — where they doubtfully 

 put it — not being able to examine any species of that genus. 



