260 CRUSTACEA. 



dish yellow, excepting anterior pair, which resembles carapax. Inner 

 angle of orbital cavity on the front somewhat prolonged and acute, or 

 subacute. 



The sinuous front of the carapax has the two inner prominences 

 low triangular, approximate, and separated as in most species by a semi- 

 circular concavity; serratures of arm equal and acute, serratures some- 

 times slightly serrulate. Length of third joint of posterior legs, a little 

 more than twice the breadth. 



The legs are shorter than in the dentata, yet the species closely re- 

 semble one another, and if the areolation of the colour is not a 

 specific character, this may be only a variety of that species. 



T. septata (var. ?) The areolation is much coarser than in the areo- 

 lata, and the inner angle of the carpus is not acute. It is, perhaps, a 

 variety of the T. ferruginea. 



Plate 15, fig. 9 a, carapax, enlarged; 6, male abdomen; c, arm and 

 carpus in outline. 



From the Sooloo Sea. 



TRAPEZIA FERRUGINEA (Latreille) . 



Frons sinuosus, angulo orbitce inferno inferiore obtuso. Dens carapacis 

 lateralis acutus. Pedes antici grandes, carpo apicem internum angu- 

 lato, non acuto, articulo tertio apicem internum acuto, prominente, 

 marginem internum dentato, denticulis truncatis aut subduplicibus aut 

 serrulatis. Pedes postici paulo graciles, sparsim pubescentes, articulo 

 tertio angusto. 



Front sinuous, inner inferior angle of orbit obtuse. Lateral tooth of 

 carapax acute. Anterior feet large, carpus angulate at inner apex 

 but not acute, third joint prominent acute at inner apex, inner 

 margin dentate, teeth truncate or somewhat double, or serrulate. 

 Posterior feet sparsely pubescent, third joint narrow. 



Plate 16, fig. 1 a, animal, enlarged; b, another variety. 



