PYCNOGONIDS 



lateral comers produced, rounded, smooth; sutures indistinct; lateral 

 processes crowded, about as long as breadth of trunk in median part, 

 much broader distally, where they have on the dorsal border two small 

 tubercles which bear a few short bristles. On the first lateral process 

 one of these tubercles is usually much reduced (pi. xix, fig. 2). 



Caudal segment moderately long, reaching to the posterior border of 

 the first coxal joint of the fourth pair of legs, narrow, curved slightly 

 upward, and continued more or less into an upward projection at the tip ; 

 possessing a few minute bristles. 



Eye tubercle slightly back from the anterior margin of the first trunk 

 segment, moderately high, sharply pointed, nearly straight on the ante- 

 rior border, sloping and with a slight hip posteriorly. Eyes dark; at 

 the base of the tubercle. 



Proboscis large, equal in length to femoral joint of leg, broadly cla- 

 vate, truncate at the apex, usually bent far over so as to be directed 

 downward ; roughly triangular in section, thus appearing from the side 

 much more convex on the dorsal border. Without circular constriction. 



Chelifori barely one third as long as proboscis ; scape short and com- 

 paratively thick, produced dorsally at the distal end into a considerable 

 projection; second joint nearly half as long as first, elliptical. The 

 cheliforus is unarmed except for a few very short bristles at the end of 

 the scape. 



Palpi 8-jointed ; when fully extended distal 4 joints reaching beyond 

 the proboscis; jj.i and 3 short; jj.2 and 4 long, equal; jj.$, 6, 7, 8 

 short, the first three of these triangular, being much broader at the distal 

 end, the next distal joint in each case articulating at the dorsal side, thus 

 leaving a rounded projection below, which is bristly with short spines ; 

 /8 elliptical, similarly armed. Joints 2 and 3 have a few rather stout 

 bristles at their distal ends, and a row of similar bristles extends along 

 the dorsal side of/4. 



Ovigera of female about as long as palpi: /i short and broad; /3 

 short; jj.2, 4, and 5 longer and broader than 7.3 ; jj. 6 to 10 gradually 

 diminishing in size \ jj. 7 to 10, at least, with two denticulate spines 

 each ; appendage otherwise unarmed except for a few scattered minute 

 spines. Oviger of male nearly twice as long as that of female ; /i short, 

 broad; /2 two or three times as long, also broad ; jj.^ and 4 somewhat 

 longer than j. 2, but more slender;/ 5 nearly as long as /4, broader 

 again ;/6 shorter, about as broad as/5;^'.7 to 10 decrease gradually 

 in size and diameter, except that j.g is longer than /8. Denticulate 

 spines, two in number, were observed only on/io. The terminal part 

 of the oviger is turned sharply inward and curved back upon itself. 



