NO. 9 HILTON : PYCNOGONIDS 301 



Characteristics : Body nearly disclike, 3 strong spines on the middle 

 line of the dorsal side. Segmentation lines not distinct. Chelifori with 

 compound spines. Abdomen with a linear series of compound spines. 

 Three basal teeth on the 2nd tarsus of the legs. Tufts of spines, 2 for 

 each transverse process of the body at their distal margins. 



Description 



Body: Almost circular in outline. Hall describes the lateral proc- 

 esses grown together throughout their length. I have examined many 

 specimens which agree with Hall's description in every other respect in 

 this well-marked species, but have never found any of the lateral processes 

 really fused. They are often veiy close to each other and even filled with 

 dirt so as to resemble this condition, but in every case more careful exami- 

 nation revealed a true separation between these processes. 



There are no intersegmental lines. Lateral processes are strongly de- 

 veloped, each bearing 1 to 2 tufts of spines. In the center of the back is 

 a row of 3 large erect processes, each bearing numerous spines. 



Eye tubercle: Relatively small, length about twice the diameter. 

 Eyes not deeply pigmented. 



Proboscis: Shorter than the apparent length of the body but actuall}'^ 

 longer, because it arises underneath and back. It is bluntly rounded in 

 front, with a notch at the tip. Its diameter is about half its length. 



Abdominal segment: About % the length of the body. Along the 

 upper side of the abdomen is a row of long projections bearing spines. 

 The diameter of the abdomen is about % its length. 



Chelifori: Short, slightly longer than the proboscis or reach out 

 beyond it. The appendage has a number of complex spine-bearing proc- 

 esses. The basal segment is about the size of the 3rd terminal segment. 

 The 2nd segment is about ll^ times as long as the other two combined. 



Palpi: Nine-jointed, extending be^^ond the proboscis about ^^ their 

 length. First joint is shorter and broader than the others. The 2nd is 

 longest, almost % the whole appendage; 3rd, very short; 4th, not quite so 

 long as the 2nd. A ridge across the 4th makes it appear like 2 joints as 

 viewed from above. The terminal joints diminish in length. There are a 

 few hairs on the first 6 joints, but the terminal joints have many. The 2nd 

 joint is thickened at the ends. The average diameter of the appendage is 

 about ^2 t^^ chelifori. 



Ovigers: Nine-jointed, their diameter between that of the last 2 

 appendages described. The joints in order of their length are as follows: 

 4, 2, 5, 3, 6, 7, 8, 9, 1. The terminal joints bear a number of rather long 



