569 



459 



Fig. 246. Amphithyrus bispinosus Claus. 



6ch segment. Coxal plate V is stretched into an acuminate spine directed 

 backward and has a large pointed process on the inner side; the 2nd 

 segment is 2.5 times longer than wide; the distal segments are 1.2-2.5 

 times the 2nd segment in length. The 2nd segment of pereopods VI has 

 a rather deep notch in the anterior margin close to the base, the posterior 

 margin is bulged, and the lateral fissure is crescent-shaped; the 5th seg- 

 ment is half the length of the 4th and has a similar distal process; the 6th 

 segment is longer than half the 5th segment. Pereopods VII generally 

 consist of a 2nd segment that is narrow, forwardly bent, and rounded at 

 the tip; sometimes one-two rudimentary distal segments are present. 



