rOPEPODA. 17 



distal joints taper .and are very slender. Proportional length of joints of anterior 

 antennse : — 



1&2 I 3 I 4 I 5 I (i I 7 I 8&9 I 10 I 11 I 12 I 13 I U [ 15 I IG I 17 I IS I 19 I 20 I 21 I 22 I 23 I 24 I 25 



12 I 4 I 5 I 5 I 5 I 5 I 14 j C | 9 | 9 | 12 ] 12 | 1 3 | 13 | 14 1 14 | 15 | 10 | I) | 10 | 10 j 7 | 3 



The eighth and ninth joints arc quite coalesced, but in some there is a weak line of 

 division. 



The second pair of feet have each the characteristic hooks on Eil, and the 

 outer one is the longest. The surface of the second basal is beset with short spines, 

 but not the Re 1. The third feet are normal and with shortened end saw. The fifth 

 pair each consist of four segments, of which the basal is greater than the second, 

 this longer than the third, and third longer than the fourth and terminal segment. 

 The first joint has on its surface a considerable bunch of long stiff hairs (as in 

 princeps), the second joint has a long stiff feathered bristle on the outer distul margin, 

 and the third joint has a short upright spine on the outer distal margin, in all specimens 

 (not on the inner side as figured by Giesbrecht), and the end joint has three rather 

 long fine bristles, of which the innermost is the longest. The spine on the third joint 

 was in one example replaced by two very short spinules on the right foot, while none 

 were present on the left side. 



$ 5 ■ 8-6 mm. long (cephalothorax 3 • 25 mm. Abdomen 2 • 3 mm. long). 



Relative lengths of the abdominal segments =14, 10, 10, 4, and the furcal segments 

 1 3. The left furcal segment is a little the largest and thickest, and six times as long 

 as broad, and three times as long as the short anal segment. 



The anterior antenna) extend for about three joints beyond the furca, as in the 

 female, and the left one is a clasping organ with weak joint between the seventeenth 

 and eighteenth segments. The segment beyond the elbow is very long and thin, and 

 as long as the next two distal joints. There are four joints beyond the elbow. The 

 conjoined first and second (basal) joints have two strong teeth, the distal one the 

 largest and curved slightly forwards. The fourth joint has a smaller tooth. Fifth feet : 

 The right foot with very long first joint, the second short, but with very strong, broad- 

 based curved and long hook, the third joint nearly twice as long as the second, and the 

 fourth and end joint a long simple spoon-process twice as long as the third. In 

 the left foot the first joint is very small, the second nearly twice as long, the third 

 a short joint, the fourth a very long simple curved spoon-shaped process. On the 

 inner margin (proximal) of the fourth, of the third, and the distal foot of the second 

 are fine hairs. Both feet are of nearly similar length. 



EUCHAETA (Philippi). 



Two representatives of this genus appear in the ' Discovery ' collections — 

 E. antarctica, and another which appears to have constant differences, and to which I 

 have attached the name E. similis. I do not in this collection find any example of 



