515 



Fig. 223. Streetsia steenstrupi (Bovallius). 



closed this denticle extends beyond the base of the claw. The 2nd seg- 

 ment of pereopods II has straight margins, its width is 1/4 its length, 

 and its length equal to the remaining segments together; the 5th segment 

 is distally broadened and together with the narrow 6th segment forms a 

 well-developed chela; the process of the 5th segment reaches the base 

 of the claw, the width of the process at the base is more than half that 

 of the distal margin, its surface, like that of the 6th segment, covered 

 with thin setae, and its distal part denticulate. The 2nd segment of pere- 

 opods III-IV is shorter than the 3rd-5th together; the 4th-7th segments 

 bear short setae along the posterior margin. Between the coxa of pere- 

 opods V and the 2nd segment a stiff, backwardly directed spine occurs; 

 the 2nd segment has a straight anterior and bulged posterior margin and 

 its length is twice its width; the 4th segment is equal to the 6th in length, 

 the 5th segment shorter; the 2nd and 3rd segments are armed along the 

 anterior margin with both spinules and sparse setules, the 4th-6th seg- 

 ments only with sparse short setules. The 2nd segment of pereopods VI 

 has a straight anterior margin, a proximally highly bulged posterior mar- 

 gin, and both margins are distally somewhat produced; the 4th segment 



