DAN AT A DUBIA. 69 



The superior antennas are more tlian half the length of 

 the body of the animal. The first joint of the peduncle 

 is longer than the head ; the second joint is not much 

 more than half the length of the first ; the third is lost 

 in connection with the flagellum, which is longer than 

 the peduncle, and fringed with fine cilia ; the inferior 

 pair are not so long as the superior. The peduncle does 

 not reach beyond the peduncle of the superior, and the 

 flagellum is as long as the peduncle, and fringed with 

 fine cilia. The first pair of limbs have the coxse hid by 

 the coxae of the succeeding pair ; they are slender, and 

 terminate in a long straight finger. The second pair of 

 limbs have the first joint produced inferiorly and an- 

 teriorly, so as to cover that of the first pair of limbs and 

 the appendages of the mouth ; the inferior margin is 

 serrated upon the posterior half. The wrist is short and 

 inferiorly produced ; the hand is broader at the palm than 

 near the wrist ; the palm is convex, slightly oblique, 

 fringed with hairs, and imperfectly defined, the inferior 

 angle being rounded. The third pair of limbs have the 

 first joint produced rather deeper than the preceding ; 

 it is irregularly serrated the whole length of the inferior 

 margin ; the rest of the leg is long and slender, and 

 furnished with many long hairs : the finger is long and 

 powerful. The fourth pair of limbs have the first joint 

 deeper than the preceding, not serrated along the in- 

 ferior margin, but furnished with a row of solitary 

 equidistant short hairs planted within the margin ; the 

 posterior margin is excavated near the upper edge to 

 receive the anterior lobe of the coxa of the succeeding 

 pair of legs. The rest of the organ is similar to that of 

 the first pair. The fifth pair have the first joint bilobed 

 and the second joint ovately dilated. The two posterior 

 pairs resemble the fifth. The caudal appendages are 



