573 



462 



Fig. 249. Amphithyrus glaber Spandl, male. 



463 



The shape of the body is the same as in the preceding species. The 

 body surface is smooth, without hexagonal or striate sculpturing. 



The 2nd segment of pereopods I has barely bulged margins and 

 is equal in length to the remaining segments together; the 4th and 5th 

 segments are equal in width; the distal process of the 5th segment is 

 narrow and long, reaching the base of the denticle of the 6th; in the 

 6th segment the denticle forms an acute angle with the posterior margin. 

 The 2nd segment of pereopods II is longer than the distal segments; 

 the 4th segment is broader than the 5th; the chelae are the same as in 

 pereopods I but the distal process reaches the tip of the denticle of the 6th 

 segment. The claws of pereopods I and II are appreciably thickened in the 

 middle part. The 2nd segment of pereopods V is much shorter than the 

 distal segments together; the 4th-6th segments are approximately equal 

 in length and their anterior margin is denticulate. The lateral fissure of 

 the 2nd segment of pereopods VI is much less curved than in A. similis; 

 the 4th segment is 1.5 times longer than the 5th; the margins of the 5th 

 segment are bulged; the 4th and 5th segments have a distal process but 

 in the 5th segment the process is shorter; the 6th segment is distally 

 broadened and half the length of the 5th. Pereopods VII consist of a 

 2nd segment that is stretched and almost straight and barely perceptible 

 rudimentary distal segments. 



The rami of uropods I are equal in length to the basipodite but in 

 uropods II are longer. The endopodite of uropods III is fused with the 



