112 



PORTUNID.E. 



DECAPODA. 

 BRACHYURA. 



FOBTUNIDM. 



DWARF SWIMMING-ORAB. 



Portunws pusillus. 



Specific chara.eter. — Carapace considerably raised, rugose ; front three-lobed, 

 much advanced ; latero-anterior margin with five teeth. 



Porttmus ptisiUiis, Leach, Malac. Brit. t. ix. f. 5 — 8. Edwards, Nat. 



Hist. Ciiist. I. p. 444. 

 „ maculahw, Risso, Hist. Nat. Eu. Merid. v. p. 5. Roux, Crust. 



Mediter. t. xxxi. 



The carapace of this species is broader than it is long-, 

 considerably elevated, and with the regions remarkably 

 distinct ; the surface is rugose, and irregularly granulated. 

 The front is advanced much beyond the orbits, flattened, 

 and three-lobed, the middle lobe being longer than the 

 others : the latero-anterior margin has five teeth, (including 

 the outer angle of the orbit,) of which the posterior one is 

 the most acute, and the most curved. The posterior 

 margin is almost straight. The first pair of legs are large 

 and robust ; the wrist is armed with a very strong spine 

 on the inner and anterior angle ; the hand has a double 



