BRACHYURA. KATHBUN. 137 



leg and at widest part of carapace, one over second leg 

 and a short distance behind second tubercle, fourth and 

 largest over base of last leg. A large, pointed, median 

 tubercle on intestinal region just over posterior margin; 

 this margin is rough with granulation. 



The subhepatic facet is almost entirely visible from 

 above; it has a strong tooth at its postero-external angle, 

 and the anterior half has a granulate outer margin. 



Front four-toothed, teeth thick, middle pair small, 

 separated by a rectangular sinus, outer pair broad and 

 shallow. Upper sinus of orbit deep. 



Anterior portion of outer maxillipeds granulate and 

 hairy. Chelipeds stout, smooth to the touch, finely granu- 

 late, the granules largest on the cylindrical merus; palms 

 of female moderately swollen, greatest width two-thirds of 

 upper or outer length; fingers longer than palm, deflexed, 

 tapering regularly to tips and leaving a very slight opening 

 at base when closed. 



Of the ambulatory legs the merus joints are cylindrical, 

 the propodus sharply carinate above, dactylus carinate on 

 either side. 



The unique holotype has a very large Rhizocephalid 

 parasite enclosed within the abdomen. 



Relationships. The species differs from all others with 

 straight posterior margin in having an acute backward- 

 pointing tooth at the ends of that margin. Compare 

 ! e; narks by Miers 20 on the species related to P. rectangularis. 



Family CALAPPID.E. 

 CALAPPA LOPHOS (Herb si] . 



Calappa lophos, Alcock, Journ. Asiat. Soc. Bengal, Ixv., 

 1896, p. 144. 



Seven miles north-north-east of Bowen, Queensland, 16 

 fathoms; E.3095; one female. 



Eight miles east of Sandon Bluffs, New South Wales, 

 35-40 fathoms; E.2031; one male. 



20 Miers Zool. ' ' Alert, ' ' Crust,, 1884, pp. 54G-547. 



