MiMONECTES, A REMARKABLE GENUS OF AmPHIPODA HyPERIDEA. 9 



The fourth pair are very similar to the third, but shorter (13: 

 15). The ephneral is deep, rounded, smaller than the preceding, and 

 does not occupy the whole under-side of the segment. The femur is 

 as long as the three following joints together, four times as long as 

 broad. The branchial sack is about half as long as the leg, the ovige- 

 rous lamella only a little shorter than the leg. 



The fifth pair [Pi. III. fig. 24] are longer than the fourth pair, but 

 shorter than the third (14: 15). The epimeral is long and large, with 

 rounded corners and an excavation at the middle of the under-side; it 

 occupies nearly the whole length of the segment. The femur is nearly 

 four times as long as broad (50: 13), linear, with some short hairs at 

 the anterior margin. There is a round gland in the lower part of the 

 joint. The genu is short, the anterior margin fringed witn minute hairs. 

 The tibia is broad and long, twice as long as the preceding joint; the 

 anterior margin is finel}^ serrated and fringed with minute hairs. The 

 carpus is longer than the tibia, serrated at both margins, carrying at the 

 anterior margin the same kind of hairs as the preceding joint. The in- 

 terior of the joint is occupied by a row of larger and smaller rounded 

 glands. The metacarpus is shorter than the carpus (3: 5), fringed with 

 very minute hairs at the anterior margin. The dactylus is short and 

 feebly curved. The branchial sack equals half the length of the leg, 

 the ovigerous lamella scarcely more than a third. 



The sixth pair [PI. II. fig. 18] are more slender than the preceding and 

 of the same length as the fourth pair. The ephneral is small, not half as long 

 as the preceding, rounded; it does not occupy more than a third of the 

 length of the segment. The femur is more than twice as long as broad 

 (8: 3), without hairs or bristles. Some very small, globular glands are 

 to be seen in the lower part of the joint. The genu equals one fourth 

 of the length of the femur, and is smooth. The tibia is more than 

 twice as long as the preceding joint, linear, smooth. The carpus is 

 longer, linear, smooth, with a small glandular mass in the middle. The 

 metacarpus is shorter than the carpus, linear, with some fine hairs at 

 the lower end. The dactylus is nearly straight, only a sixth of the 

 length of the metacarpus. The branchial sack is shorter than half the 

 leg (5: 13"). The ovigerous lamella is a little shorter than the bran- 

 chial sack. 



The seventh pair of pereiopoda [PI. II. fig. 19] are as long as 

 the first pair. The epimeral is very minute, half as long as the preced- 

 ing, rounded, not occupying more than a fourth of the under-margin 



Nova Acta Reg. Soc. Sc. Dps. Ser. III. 2 



