32 



RATHBUN 



segment, a minute black ocellus above and toward the outside, and be- 

 yond the limit of the cornea. 



Fig. lo. Urocaris infraspinis. 9 (X Ss)- . Locality unknown, a. Side. b. Dorsal 

 view of anterior portion. 



Antennular peduncle nearly as long as carapace, exclusive of rostrum ; 

 first segment broad, its thin outer margin armed with a spine on the basal 

 portion and another at the extremity ; the inner angle of the lateral ex- 

 pansion is advanced beyond the articulation of the second joint ; second 

 and third segments subequal and together nearly equal to the first. The 

 acicle is oblong, extremity oblique, produced at inner angle away beyond 

 outer spine, which is in line with end of antennular peduncle. The an- 

 tennal peduncle scarcely reaches end of first antennular segment ; fla- 

 gellum as long as body. 



The outer maxillipeds extend to the middle of the last joint of the an- 

 tennal peduncle. The first pair of feet reach the spine of the acicle; 

 merus, carpus, and propodus subequal, palm and fingers subequal. The 

 second pair of feet are as long as the distance from the end of the ros- 

 trum to the posterior end of the first abdominal somite; the ischium, 

 merus, and carpus subequal, palm a little shorter, swollen ; fingers nearly 

 as long as palm. Last three pairs of feet reaching about to end of acicle ; 

 dactyli short, with a slender spine on the under side. 



Abdomen geniculated at the third segment. Posterior margin of all 

 the segments truncate. Sixth segment shorter than carapace (rostrum 

 excluded), less than twice as long as fifth segment, and a little longer than 

 the telson. Telson with two pairs of lateral spines, the outer uropods 

 much longer than the telson, the inner uropods intermediate in length 

 between the outer pair and the telson. 



Dlmensmis. — Length of carapace and rostrum of ovigerous $ 6 mm., 

 of rostrum 2.5 mm., of abdomen 15 mm. 



