CYCLOPOIDEA. 



1157 



oblong, with a few setae hardly as long as the diameter of the joint. 

 The third joint is half shorter, and smaller at base ; the fourth at 

 base is about two-thirds its length, and has the posterior side nearly 

 straight, and there is a stout spinous prolongation of the anterior 

 apex. The fifth and sixth joints are quite slender, and each not 

 longer than the fourth; the following part appears like a single joint, 

 though consisting normally of three joints, and having the setae of 

 three, like the left antenna. 



The second (or third ?) joint of the right posterior foot is stout and 

 oblong subterete ; and from the basal part proceeds a long spine, bent 

 at first backward, and then around and forward, three times as long 

 as the joint. At apex, this joint is articulated with an acute spini- 

 form finger, but little longer than the preceding. 



Natatories four pairs, the anterior half smaller than the others, 

 which are nearly equal. The longer branch three-jointed, the shorter 

 in all, two-jointed. 



Pontellina pulchra. — Figs. 3 a, b, c, d, e, on Plate 81, represent a species 

 which in many respects resembles the preceding. The position of the 

 antennae in the figure may not be accurate, as in a few earlier drawings 

 made, the importance of strict accuracy in this point was not appre- 

 ciated. It has the antennae of a female ; yet the posterior thoracic 

 feet are large and the right is prehensile, as in fig. 3 e. The hand of 

 the right foot is made of a large broad joint, nearly quadrate, articu- 

 lated with the preceding near one angle, and bearing towards the 

 other of the same side a long stout spine, which projects first backward 

 and then bends around forward, and is incurved at apex. The move- 

 able finger is arcuate, and is articulated with the large joint directly 

 opposite the base of the spine described. The species has the inferior 

 eyes large and very much elongate as in the P. perspicax. The longer 

 branch of the posterior antennae is more than twice the length of 

 the shorter, and its setae are longer than the branch. The anterior 

 apical seta of the anterior antennae is a little longer than the joint. 

 The posterior angles of the cephalothorax are much prolonged and 

 acute, being longer /than half the abdomen. The abdomen is five- 

 jointed. The caudal stylets are shorter than in the perspicax, being 

 about as long as the last joint of the abdomen ; and there are four 

 subequal setae, with an outer much shorter. Natatories four pairs, 



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