STREETSIA STEENSTRUPI. 91 



magnifying power, shows traces of a very minute serration consisting 

 of densely placed rounded teeth; the apex of the hind margin projects 

 a little along the dactylus into a broadly rounded process; the dactylus 

 is short, with the hind margin entirely smooth. The second pair (p. 

 33, fig. 55) have the stem of the carpus as long as broad; the hind 

 margin is fringed with five or six long bristles; the carpal process is 

 broadly triangular, not outdrawn into an apical spine-like tooth; the front 

 margin is entirely smooth, and without spines; the sides ot the joint and 

 of the process show an oblique row of long bristles; the metacarpus is 

 comparatively narrow; the front margin is convex, the hind is straight 

 and smooth, not forming a distinct edge ; the dactylus is fully half as 

 long as the metacarpus, with the hind margin smooth. The fifth pair 

 are much longer than the sixth ; the femur is about twice as long as 

 broad, with the lower hind corner produced downwards into a broadly 

 rounded process reaching to the apex of the genu; the femur is shorter 

 than the three following joints together. The sixth pair have the fe- 

 mur about as long as all the following joints together; the apical process 

 is broadly rounded, and reaches fully to the apex ef the genu ; the front 

 margin of the tibia is fringed with longer and shorter spine-like teeth, one 

 long one and one short one alternating (PL III, fig. 5). The seventh pair 

 are very long, reaching nearly to the apex of the tibia of the sixth pair; the 

 femur is broad, scarcely a third part longer than broad, with the upper hind 

 portion dilated; it is a little longer than all the following joints together. 



The pleon is as long as the first five perasonal segments together. 

 The hind corner of the pleorial segments is not produced backwards, 

 but is angular. 



The first pair of uropoda (PL III, fig. 6) reach almost to the 

 apex of the last pair; the peduncle is linear, nearly five times as long 

 as broad, and more than a third part longer than the inner ramus ; the 

 inner ramus is elongate -lanceolate, serrated on both margins, and is longer 

 than the outer ramus, which is elongated, sharp-pointed, smooth on the 

 outer margin and serrated on the inner. The second pair reach nearly 

 to the middle of the inner ramus of the last pair ; the peduncle is much 

 broader than that in the first pair, and not fully three times as long as 

 broad; the inner lower corner is a little projecting, and sharp-pointed, as in 

 the first pair; the inner ramus is only a little longer than the peduncle, 

 lanceolate, serrated on both margins, and is CDnsiderably longer than, and 

 not fully twice as broad as, the outer ramus, which is serrated on the inner 

 margin, and smooth on the outer. The third pair reach as far as four- 



