230 CARCINOLOGICAL STUDIES. 



carinate above; this short crest, running obliquely back- 

 wards and being likewise pubescent, is the fourth of the 

 five elevated lines that are seen on each half of the up- 

 per surface of the cephalothorax. The fifth, finally, is the 

 longest and proceeds almost transversely ; it occurs between 

 the fourth line and the posterior border of each proto- 

 gastric lobe. In Heterop. indica before this fifth line, mo- 

 reover a much shorter one is found near the third antero- 

 lateral tooth , but this shorter line is completely wanting 

 in Maitland's species. The upper surface of the anterior 

 half of the cephalothorax before and between the described 

 transverse lines is quite smooth. 



The front is a little less broad in this species in pro- 

 portion to the width of the cephalothorax than in Heterop. 

 indica^ its breadth being not quite one third of the width 

 of the carapace ; it is nearly as prominent and presents 

 the same form, but each lobe is somewhat less distinctly 

 emarginate towards its external angle. Immediately be- 

 hind the granulated margin of the front and parallel with 

 it, a granulated crest occurs, likewise divided into two 

 halves by a median triangular incision, so that the front 

 may be described as bimarginate, which seems to be also 

 the case in Heterop. indica according to my description. The 

 orbits have quite the same form and the same fissures on 

 their finely granulated margins as those of Heterop. indica , 

 namely two on the outer half of the upper margin and 

 one small triangular incision on the finely granulated in- 

 ferior margin near the little prominent external orbital 

 angles. The inner angle of the under margin projects, 

 as in Heterop. indica, as a rather obtuse tooth a little 

 beyond the inner angle of the upper margin. 



The antero-lateral margins are armed with four promi- 

 nent teeth, including the external orbital angles; these 

 teeth present just the same form and the same proportions 

 as those of Heterop. indica , so that the description of the 

 latter is wholly applicable to Maitland's species. The in- 

 flected sides of the cephalothorax are finely granular and 



rifotes from the Leyden Museum, Vol. XIV. 



