PYCNOGONIDA. 23 



except a distal fringe of long and slender ones. The palm of the chela occupies 

 about half its length, and bears a number of fine setae dorsally. The fingers are 

 long, slender, incurved at the tips, and provided with numerous slender teeth, 

 irregular in size and not very closely set. 



The Palp arises laterally at the side of the proboscis (fig. 2a), and comprises the 

 normal five joints, all of which, except the first, are very long and slender, the pro- 

 portions being 10:10:9:11. Setse are non-existent on the first two joints ; on the 

 third scanty, most numerous on the terminal joint, but not very thickly distributed 

 there ; they are small, rather delicate, and occur mainly on the outer side of the limb. 



The Oviger has the normal ten joints, and arises on a small ventro-lateral body- 

 process just in front of the first pair of lateral processes (fig. 2b). The first three joints 

 are small, but progressively lengthen, the third having the usual oblique termination. 

 The fourth joint is long, the fifth longer, and the sixth still long, though the shortest 

 of these three, the proportions being about 7:8:5. The sixth joint is rather thinly 

 covered with small setse on its outer side, and has a well-developed distal fringe. 

 The preceding joints have so few minute setse between them that they are scarcely 

 noticeable. Of the four terminal joints, the first is about twice the length of the next ; 

 the other three diff"er very little in size, but the middle one is the smallest. All are 

 provided with a few small setse and distal fringes. The terminal claw bears a dozen 

 slender teeth rather closely set. The denticulate spines form a single row (plate X., 

 fig. 9). They consist of a stout shaft, which begins to taper at about a quarter of its 

 length, where the denticulations begin. Of these there are from five to seven ; the 

 first is small, the next three large, and the remainder more or less vestigial. Of 

 these spines there are 10 : 5 : 4 : 5 respectively on the various joints. 



The Legs are long and slender, attaining a length of nearly 45mm. The three 

 coxse are long, the second being longer than the other two together ; these joints are 

 rather scantily clothed with setse of no great length. The proportions of the following 

 joints are 8'5 : 9'5 : 12 : 4 : 3. The terminal claw is very long and slender, more than 

 half the length of the propodus, and there are no auxiliaries. The limb is clothed with 

 setse, not very closely set, in a linear manner. On the femur and tibia they are very 

 long and slender, becoming reduced in size on the tarsus, while on the propodus they 

 are very small. 



Two examples of this species were taken off' the Barrier in 300fm., bottom mud, 



27th January, 1902. 



Nymphon adareanum. 



(Plate III., fig. 3.) 

 Specific characters : — 



Body smooth and slender, with lateral processes widely separated. 



Ocular tubercle short, rounded. 



Palps five-jointed, proportions of last three 2"5 : 1'25 : 1'75. 



Oviger ten-jointed, without denticulate spines, but with very few simple curved spines. 



Legs of moderate length, with rather long setae, terminal claw with two well-developed auxiliaries. 



