214 PALINURIDiE. 



Pali7mrus vulgaris, Latr. Ann. du Mas. III. p. 391. Regn. Anim. 



Cuv. IV, p. 8.— Leach, Mai. Pod. Brit. t. 

 XXX.— Ed w. Hist.Nat. Crast. II. p. 292. 



The carapace is entirely covered with spines of various 

 size ; the sulcus separating the gastric and hepatic regions 

 from the posterior portion is deep and smooth ; the 

 central rostral tooth triangular : the lateral spines, which 

 cover and protect the eyes, are broad, triangular, the 

 point sharp, the anterior edge furnished with a few strong 

 teeth ; at the base of each is a strong spine : on the 

 anterior margin of the carapace, below the orbit, is a 

 very strong triangular spine, standing forwards. The 

 eyes are large, globose, with a contraction immediately 

 behind them ; and the peduncle is long, exposed, and 

 moveable. The external antenna; are extremely long ; 

 the peduncle very thick and strongly spinous ; the basal 

 joint of each meets its fellow beneath, forming a broad, 

 smooth epistome, toothed at the anterior margin, its 

 centre tooth much larger than the others, — at the base 

 of this joint is placed the organ of hearing, in a tuber- 

 cle raised above the surface ; the remaining joints very 

 moveable, nearly cylindrical, with strong spines on the 

 upper and lower sides ; the setaceous portion very long, 

 composed of numerous short rings, which are closely 

 united for the first half of its length. The internal 

 antennte are long, the peduncle cylindrical, the second 

 joint nearly as long as the two succeeding ones ; the 

 setffi very short, and composed of several rings. The 

 external pedipalps are pediform, the joints with short 

 spines, and tufts of short stiff hairs. The first pair of 

 feet robust in the male, smaller in the female, in both 

 shorter than the others, monodactyle, but the penul- 

 timate joint or hand has a strong spine on the inner 



