28 Carl Bovallius, 



with rounded, minute teeth, and provided with stout, straight bristles of an- 

 other kind than those bordering the rest of the metacarpus [PL III, fig. 52J. 

 The tliird pair [PL III, fig. 53]. The femur is tolerably broad; 

 the genu short; the tibia very long, broad, with some short spines at the 

 hinder lower corner. The carpus is ovate, short, scarcely half as long as 

 the femur. The metacarpus is long, as long as the tibia, narrow, finely 

 serrated along the hinder margin. The dactylus equals a third of the 

 length of the metacarpus; it is not very curved, finely serrated along 

 the hinder margin. 



The fourth pair [PL III, fig. 54]. The femur is longer than broad, 

 smooth; the genu is short; the tibia is long and unusually broad, broader 

 than half its length (9: 15), with some minute spines along the hinder 

 margin, pointing to the state in Hyperiopsis; the tibia equals the 

 length of the femur. The carpus is ovate, half as long as the tibia. 

 The metacarpus and dactylus are similar to those of the preceding pair, 

 the dactylus only a little longer [PL III, fig. 55]. 



The fifth pair [PL III, fig. 56]. The femur is broad, laminar, the 

 hinder ])art deeply produced downwards, the hinder margin straight; 

 the genu small; the tibia broad, provided with minute spines along 

 the anterior and posterior margins ; the carpus is only a little shorter 

 than the tibia, serrated at the anterior margin, with two small spines. 

 The metacarpus is as long as the carpus; the dactylus longer than half 

 the metacarpus, both serrated along the anterior margins. 



The sixth pair [PL III, fig. 57]. The femur is broad, laminar, the 

 hinder part not so deeply produced as in the preceding pair; the an- 

 terior and posterior margins rounded ; at the lower anterior corner there 

 are some strong bristles. The tibia is narrower than in the preceding 

 pair, with the same armature. The carpus is as long as the tibia; 

 the metacarpus a little shorter; the dactylus half as long as the preced- 

 ing joint; all three joints serrated along the anterior margins. 



The seventh pair [PL III, fig. 58] are a little longer than the fifth 

 and sixth pairs; the femur has the anterior margin straight; the follow- 

 ing joints are similar to those of the sixth pair. 



The 2)leon. The segments are large, subequal, tolerably deep; the 

 flanks of the segments are rounded, with a slight angulation inferiorly. 

 The pleon is as long as the first four segments of the pereion; tlie sur- 

 face is smooth and hard as in the pereion. 



The pleopoda [PL III, fig. 59] consist of a thick j)eduncle and 

 two l(jng, articulated flagella, bordered with long, plumose hairs. The 



