LONG-LEGGED SPIDER-CRAB. 0> 



patic region, forming, with one on the gastric region, an 

 equilateral triangle ; there are two small ones on each 

 branchial region, and one, the largest of all, on the cardiac ; 

 there are also one or two smaller ones near the latero- 

 anterior margin. The rostrum is of moderate length, 

 scarcely reaching to the middle of the third joint of the 

 peduncle of the antenna? ; it has a groove through its 

 whole length, reaching to the back of the orbit. The ex- 

 ternal antennae are long and setaceous, and furnished with 

 several long hairs ; the basal joint is narrow, entirely im- 

 moveable, and continuous with the epistome ; the move- 

 able part of the peduncle consists of two joints, of which 

 the second is three times as long as the first. The internal 

 antennae are lodged in fossa?, which are separated from 

 each other by a ridge, which is incomplete at the middle. 

 The eyes are oval, larger than their peduncles, and pointed 

 at the apex, where there is a small bristle.* The orbits 

 are round, and there is a prominent ridge over the upper 

 margin. The epistome, or that portion of the shell be- 

 tween the mouth and the base of the antennae, has a very 

 minute tubercle, just in front of the organ of hearing, but 

 none at the base of the antenna?, as in St. tenuirostris.^' 

 The first pair of legs in the male are about twice as long 

 as the body ; the arm has a line of minute tubercles on 

 the outer, and another on the inferior surface, which parts 

 are also hairy ; but there are no spines on its inner margin, 

 as in St. tenuirostris : the wrist is similarly furnished : 

 the hand is somewhat ventricose ; it is hairy both on the 

 outer and inner margin ; the fingers are slightly inflected ; 

 the moveable one is furnished with a tubercle near its base, 



* This curious appendage I have never seen mentioned as appertaining to this 

 genus. 



"(- This second tubercle is also found in a Mediterranean species St. /T.i 



n '_' 



