ANOMALOCEKA. 231 



pair (f. 1 f) is of moderate si/e, each composed of a 

 sloul basilar joint or plate, which at its extremity gives 

 oif two or three other flat joints or plates, all of which 

 are provided with several long setae. The second pair 

 (f. 1 d] is larger, formed of a tolerably strong basilar 

 joint, wliich is lobed at its extremity, and a slender branch 

 of five articulations. The lobes of the basilar joint, and 

 the articulations of the slender branch, are all provided 

 with several plumose seta? of considerable length. The 

 third pair (f. 1 c) is large, and strongly developed, and 

 consists of two stout joints, which have on the inner edge 

 several lobes, furnished with very long, plumose setae, 

 directed forwards and upwards, so as to meet with the 

 plumose setae of the antennules. 



The feet are five pairs in number. The first four 

 pairs (f. 1 Jt} are all alike, and formed for swimming. 

 They consist of a common joint at the base, divided into 

 two articulations, and two longer stalks. The internal 

 stalk is divided into two joints, and the external, which 

 is the larger of the two, into three, all furnished with 

 numerous setae. The fifth pair is different from the 

 others, and from each other in the different sexes. In 

 the female (f. 2 c] it is small, formed of a basilar joint 

 of two articulations, and a smaller and more slender 

 joint, of three articulations. At the base of the second 

 basilar joint, on the inner side, a small, short branch 

 springs, formed of one articulation. In the male, this 

 pair of feet (f. 1 i] is large, composed of two stalks, both 

 of wliich appear to spring from the body without a com- 

 mon foot-stalk. The one is simple, consisting of three 

 large joints, which terminate in two or three slender, 

 styliform setae, while the other is terminated by a strong 

 claw, or prehensile hand. 



The abdomen consists of four segments, the last of 

 which gives off two caudal lamellae of considerable length, 

 rach provided with five rather short and plumose setae. 

 These bodies seem adapted for assisting the animal in 

 H- Length of animal about three lines. 



