64 Mr. E. I. Pocock on the Australian 



Urodacus Jwplurus^ sp. n. 



(J . — Colour a uniform ochre-brown, with the digits, the 

 tero-ites, and the median area of the sternites blackish. 



O 7 



Carapace as long as the first and nearly half the second 

 caudal segments, shorter than the fifth, its frontal lobes 

 coarsely rugose and granular, its lateral portions finely 

 granular. 



Tergites closely granular posteriorly and laterally, very 

 finely granular in front, the last with two subdenticulate 

 keels on each side ; sterna smooth and polished, with the 

 exception of the first, second, and third, which are irregularly 

 and (? pathologically) tubercular mesially. 



Tail long, about five times as long as the carapace ; all the 

 segments wider behind than in front, especially the first, 

 second, and third ; first more than one third longer than 

 broad, fifth about four times as wide as long ; the intercarinal 

 s] aces smooth ; three inferior keels of segments 1-4 smooth, 

 the superior and superior lateral keels of these segments 

 weakly denticulate, their superior keels ending posteriorly in 

 a large triangularly spiniform tooth ; keels of fifth segment 

 denticulate, the inferior more strongly so than the superior; 

 vesicle large, its width equal to the width of the third segment, 

 its height slightly greater than width of fourth segment, 

 granular below and strongly bisulcate; aculeus slightly 

 curved. 



Palpi. — Humerus coarsely granular above, its anterior and 

 posterior crests strong and coarsely granular ; anterior surface 

 coarsely but sparsely granular; inferior surface weakly 

 granular at the base ; brachium finely granular above and 

 below, smooth in front, and smooth but with coarse scattered 

 punctures behind, the upper and lower keels bounding its 

 anterior surface coarsely granular, with a row of 12 or 13 

 pores on its lower surface posteriorly ; hand with keels normal 

 in number, but not so strong as in U. novce-hollandice and 

 arinatus ; covered above externally and below with a reticu- 

 lation of fine granules ; length of hand-back equal to width 

 of hand, shorter than movable digit ; lower surface of hand 

 furnished with a series of about 16 pores running along the 

 inner edge of the keel to the inner angle of the movable 

 digit. 



Legs with femora and patella? weakly granular ; protarsi of 

 first and second with five external spines. 



Pectinal teeth 27. 



Measurements in milUmefres. — Total length 103; length of 



