96 



Mr. E. I. Pocock on the 



Anal somite. — Tergite with strong! j raised margins, not 

 otherwise crested, but thickly granular; pleurce densely 

 porous throughout, produced into a blunt unarmed process ; 

 l€(]s about as long as the last seven body-segments ; the 

 femur and patella cylindrical, about four or five times as long 

 as thick, densely spicular, especially the femur on its inner 

 surface at the base, the patella nearly smooth posteriorly ; the 

 inner side of the femur at the base armed in one specimen 

 ( ? ?) with a short spiniform tubercle, in the other ( c? ?) with 

 a long, cylindrical, smooth process, which curves backwards 

 and extends just beyond the middle of the segment ; the 



a. Anal leg of Alipes multicostis, X 2. 



b. Anal leg of Alipes erotalus , X 2. 



c. Anal leg of Alipes appendiculatAis, X 2. 



d. Femur of anal leg of Alipes appendiculatus (5 > X 2-|-. 



^' i) }} » }) ( O )> X ^2' 



upper plate of the tibia rising in the middle of the segment, 

 but small, ending in an acutely angular prominence, which is 

 less than half the size of the extremity of the inferior plate; 

 the latter rises at the base of the segment and ends in a three- 

 sided process overlapping the base of the succeeding segment ; 

 the total height of the tibia at its posterior extremity is a 

 little greater than half the length of the segment : first tarsal 

 (protarsal) segment not quite twice as long as high, with 

 evenly convex upper and lower edges ; the median thickening 

 of the segment lightly curved and thicker in its basal third ; 

 the surface of the segment distinctly roughened with tubercles ; 

 the tarsus without trace of claw, its height two thirds of its 

 length, its posterior width about four fifths the length of the 

 tarsus ; tarsus an elongate oval, its height less than two thirds 

 of its length, no claw (figs, c, d, e). 



