164 



K. KI.SHINOUVK : 



distance removed from the anterior margin of the carapace. There exist 

 a cephalic suture and a slight ridge at the border between the cardiac and 

 branchial regions. 



The ophthalmopod is davate ; about two-fifths of the carapace in 

 length. 



The first pair of antenna; has the peduncle about twice as long as the 

 ophthalmopod. The first joint is long and flat, and has an otolith in it. The 

 two succeeding joints are cylindrical and support two flagella, of which 

 the inner is short, while the outer is about twice as long as the peduncle. 



The second pair of antennae is furnished with an expodite which is 

 equal in length to the two proximal segments of the peduncle of the first 

 antenna;, and with a long flagellimi of a very remarkable appearance. The 

 flagellum is about twice the total length of the animal and may be said to 



Proximal. 



Distal. 



consist of two portions, proximal and distal. The latter is longer than 

 the former, both being connected by a series of short and somewhat 

 prismatic articuli, about ten in number. This connecting portion is bent 

 somewhat like the letter S. Usually the proximal portion is held horizon- 

 tally outwards and at right angle to the median longitudinal plane of 

 the animal. The distal portion proceeds horizontally backwards, making 

 nearly a right angle with the proximal portion. The proximal portion is 

 rather stiff, and its articuli are furnished with very short hairs on the inner 

 margin. The outer margin is free of hairs, except on eight distal articuli, 



