82 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 38. 



line, two on either side of the median line and two below this trans- 

 verse row, one on either side of the median line. Close to the lateral 

 margin on either side, and just below the middle of the segment, there 

 is a thick bunch of hairs. The inner branch of the uropoda is pointed 

 at the extremity and extends but little beyond the abdomen. The outer 



Fig. 4.— Sph-eroma peruvianum. a, mandible. X 23. b, first maxilla. X41. c, maxilliped. X 41. 



d, FIRST LEG. e, SECOND LEG. /, THIRD LEG. g, FOURTH LEG. h, FIFTH LEG. 2, SIXTH LEG. Xl4|. 



branch has two teeth on the outer margin, with only a feeble indica- 

 tion of a third. This branch is about as long as the inner branch 

 and is also pointed at the extremity. The first three pairs of legs 

 are long and slender, the last four short and stout. All are covered 

 with long hairs. 



