JANIRA MACULOSA. 339 



segments of the body are transversely channelled near the 

 anterior margin of each, and each segment has its lateral 

 margin marked with small incisions (that vary in speci- 

 mens), giving a serrated appearance to the animal. The 

 white upper surface is punctured and marked with 

 minute dark-brown dots. The eyes are placed, some- 

 what on the disc of the head^ instead of occupying its 

 posterior lateral angles. The two basal joints of the 

 peduncle of the posterior pair of antennae are short 

 and stout ; the third is also short, but much narrower ; 

 the fourth and fifth are long and slender, and the whole 

 terminate in a long multiarticulate flagellum. On the 

 second joint of the peduncle is a short, pointed, arti- 

 culated plate ; this is tipped with three hairs. 



The first pair of legs are somewhat larger in the male 

 than in the female, and have the carpus short and 

 superiorly produced over the propodos ; the propodos 

 is long, narrowly oval, and armed along the inferior 

 margin with two or three short robust spines ; the 

 dactylos is as long as the propodos, fringed with minute 

 cilia along the concave margin, which impinges closely 

 in its entire length against the inferior margin of the 

 propodos, and has its extremity furnished witli two 

 curved ungues. 



The tail consists of a single plate ; it is flattened and 



nearly circular, with the latero-posttrior margins finely 



serrated, the extremity having but a small incision, the 



terminal styles (which are about equal to the entire tail 



in length, with the basal joint about as long as the two 



terminal branches) being affixed beneath the margin of 



the tail, so that their place of insertion is not seen 



from above.* 



* We believe that the length of the antennfe, and the amount of serration 

 at the sides of the body and tail, vary according to age and sex. 



z 2 



