HARPACTICUS. 147 



setiferous branches. Maxillae (fig. 6) well developed, 

 bearing two marginal, subqvate, setiferous lobes, and 

 several digitiform clawed processes. Posterior foot-jaw 

 (PI. LXV, fig. 8; and PI. LXIY, fig. 19) having a very 

 strong subtriangular hand, the outer margin of which 

 is strongly convex, while the inner is produced near 

 the middle into an angular promontory, beyond which 

 it is deeply excavated ; the angle is strongly toothed 

 or spined, and the teeth are continued, though of 

 smaller size, along the concave portion of the hand; 

 the apex gives attachment to a large falciform claw, 

 and the distal portion of the concave margin bears 

 one, or sometimes two, smaller claws. Outer branch 

 of the first foot elongated, the first joint marginally 

 ciliated, the cilia being arranged either in a continuous 

 series (fig. 9) or in three separate groups (fig. 10), 

 second joint ciliated in the middle, and having one 

 rather longer seta at the distal end of the row ; apex 

 3-clawed, inner branch about half as long as the outer, 

 and armed with two terminal claws. The inner 

 branch of the second foot in the male (fig. 11) has the 

 outer angle of the median joint produced downwards 

 into a long bayonet-like spine, which is about three 

 times as long as the small and almost obsolete third 

 joint. Outer branch of the third foot of the male (PL 

 LXIY, fig. 20) curved, and armed at the apex with three 

 strong spines. Fifth pair of feet (PI. LXV, figs. 12, 

 13) consisting of an ovate outer, and a broad, sub- 

 quadrate inner (or basal) joint; the inner portion of 

 the basal joint bears about five plumose setse of 

 irregular size, and its outer portion is more or less 



