FALKLAND ISLAND SPIDERS. 49 



claws. Hair generally pale yellow-grey. The under side of the 

 abdomen is paler than the upper side, having more yellow and less 

 dark mottling. 



The eye-tuherde is oval, twice as broad as long, the eyes being 

 at the extreme side edges. It is situated in the front half of the 

 cephalic part, the portion in front of it being its own width and 

 twice that distance behind. 



The thoracic part of the carapace is slightly convex with a 

 distinct marginal sulcus all round. There are small globular 

 tubercles in the median area of the cephalic j)art, but not extend- 

 ing to the sides, reaching from the eye-tubercle to the rear margin. 

 There are smaller spai^sely scattered granulations on the second, 

 third, and fourth divisions of the scutum, and a pair of tubercles 

 on the latter. Behind this are four segmental divisions thickly 

 covered with tubercles, succeeded by a posterior broader marginal 

 area, also tuberiferous, which ends, in the female, in a median 

 pointed process as long as the rear trochanters. In what appears 

 to be the male this is wanting. On the under side of the carapace 

 the flat coxal areas of the second and third pairs of legs extend 

 to a narrow sternal depression, those of the fii'st pair to round 

 the mouth -parts. There is a small lower lip above the sternum 

 and movable chitinous maxillae unconnected with the coxse of the 

 palps. A much larger upper lip is divided into two parts on 

 the under side by a muscular double wall. On the under side of the 

 tibial joint of the palp are three spinous processes on the outer 

 margin, and four on the inner. On the tarsal joint of same are 

 four spines alternately long and short on the outer side, and three 

 on the inner side of the falx-sheath. The long, slightly curved, 

 movable fang is about the length of the tarsal joint. The man- 

 dibles reach up to about the anterior end of the patellar joint of 

 the palp. There are three equal teeth on the inside of the fixed 

 claw, one large between two smaller on the movable claw. The 

 coxal area of each of the fourth pair of legs is twice as broad as 

 the median portion of the thorax lying between them. They 

 extend along each side twice the length of the three anterior coxal 

 areas. At the posterior end of this coxa a chitinous process projects 

 from the outer corner as long as the breadth of the trochanter 

 in the females, and twice that length in the males. Behind this 

 is a round convex boss. 



At the posterior end of the median area, lying between the 

 fourth coxse, are the pulmonary apertures with os'al convex lids, 

 and on the inner side between these are a pair of oval hollow 

 depressions. 



The three anterior pairs of legs are of about the -same diameter, 

 rather slender, all without spines but covered with short hair. 

 On the tarsal joint of the third and fourth pairs are two curved 

 smooth claws. Tarsus 1 has live joints ; tarsus 2 eight ; tarsus 

 3 and 4 six each. The trochantal joint of the fourth pair is as 

 long as broad and thickly covered with spinous tubercles. 



Proc. Zool. Soc— 1913, No. lY. 4 



