THE f4RNEUA AND SPECIES OF SYMPHYLA. 57 



margin deeply emarginate, the emargination angular in the 

 middle and limited by lobes^ which are broadly rounded or a 

 little angular at the hindmost point. The antero-lateral seta3 

 are directed outwards, and nearly as long as the breadth of 

 the first antennal joint. A lateral seta inserted considerably 

 more behind is a good deal shorter, though very conspicuous. 

 All the other marginal seta3 are short. The first, third, fiftli, 

 sixth, eighth, and ninth scuta each Avith an antero-lateral 

 seta from slightly longer to somewhat shorter than those on the 

 second scutum, but the seta is often directed considerably 

 backwards on the more posterior of these segments. The 

 penultimate scutum posteriorly deepl}^ emarginate, with the 

 lobes somewhat angular behind. The last scutum posteriorly 

 with a moderatel}^ large, median, deep depression, which is a 

 little longer than broad ; no overlapped cavity has been 

 developed. 



Legs. — The last pair (fig*. If?) with the tarsus four times 

 longer than deep. The metatarsus with five and the tarsus 

 with seven setas in the anterior dorsal row ; on each joint 

 these setffi increase gradually somewhat in length towards 

 the end, but the longest setns on both joints are not half as 

 long as the depth of the metatarsus; a seta of similar length 

 is found near the end of the upper side of the tibia. The 

 anterior claw (fig. 1 e) is moderately long, proximally rather 

 robust ; the posterior claw is rather slender, strongly curved, 

 and a little to somewhat shorter than the other; the front 

 seta scarcely of middle length and not robust. The exopod 

 is short, considerably shorter than the depth of the tai'sus. 

 The first pair of legs (fig. 1/) with the claws (fig. 1 g) sub- 

 equal in shape, the posterior one slightly shorter than the 

 other, the front seta short and thin. 



Cerci (fig. 4c). — Not quite four times longer than deep, 

 with the distal part somewhat elongate. They are clothed 

 with many setfe, which increase somewhat in length from the 

 base outwards, and the distal ones are slightly more than 

 half as long as the depth of the cerci. The terminal area 

 looks outwards and somewhat upwards; it is a little shorter 



