NO. 9 HILTON : PYCNOGONIDS 303 



Nymphopsis duodorsospinosa, new species 



Plate 45 



Characteristics : Body nearly disc shaped in outline, slightly elon- 

 gate. Two sharp mid-dorsal spines. Leg joints, especially the longer, with 

 compound spines. Abdomen with a few long, mostly simple spines. 



Description 



Body: Smooth except the hairs or spines at the ends of the processes 

 and the 2 large, prominent vertical dorsal spines which also bear spines 

 on the sides. Transverse processes much longer than the width of the 

 body between. There are no suture lines between body segments. Body a 

 little longer than broad. 



Ocular segment: Well developed, broad, but not more than a third 

 the length of the rest of the body. 



Ocular tubercle: Cylindrical, high vertical, bears 4 black eyes near 

 tip, placed a little back of the forward end of the body. 



Proboscis: Cylindrical, a little narrowed at the base, rather slender, 

 slightly truncate at the end. Three times as long as wide. 



Abdominal segment: Long, curved, extends at a slight angle back- 

 ward. It bears about 4 scattered spines up to its central part and 2 sharp 

 compound spines nearer the end, all on the dorsal side. There are a few 

 fine spines near the tip ventrally. It extends well beyond the last trans- 

 verse process. 



Chelifori: Three-jointed, the 1st short, cylindrical, the 2nd narrow 

 at the base, long at the end, trumpet shaped, bearing a large lateral spine 

 and series of sharp hairs along its distal end, which is like a rim which 

 encloses the small 3rd joint, which fits into the end of the trumpet-shaped 

 2nd joint. 



Palpi: Nine-jointed, the 1st small, the 2nd and 4th long. The 2nd 

 bears a few fine hairs near its end. The 3rd is small, about like the 1st. 

 The 4th bears 3 sharp spines on its inner margin, and several on the outer 

 margins include a small fleshy point. The distal end of this joint is very 

 haiiy. The remaining joints are small and bear tiny hairs, especially at 

 the end of the last and on the outer sides of the others. This appendage is 

 much more slender than the chelifori. 



Ovigers: Nine-jointed. The 1st is short and rather thick, the 2nd 

 is long and thick, the 3rd and 4th are long, slender, and curved, especially 

 the 3rd. The 5th is short, thick, and covered on all sides with small hairs. 

 The next 3 joints are more slender but of similar length. All have many 

 tiny hairs. The 9th joint is v^xy small and ends in 2 small, sharp spines. 



