No. 1670. FOVR NEW fiPECIES OF I^OPODS— HOLMES AND GAY. 379 



the uropods about as broad as long; outer ramus slender, acuminate, 

 subconical, with the outer margin nearly straight and the inner one 

 somewhat convex; inner ramus about one-third the length of the 

 outer, subconical, with narrow blunt tip which is armed with one or 

 more sharp spines; scattered short spines occur on both rami. 



Length, 5 mm. 



Locality. — San Diego, California, on moist swampy ground. 



Type.—CoX. No. 39049, U.8.N.M. 



Named after Miss Harriet Richardson, who has contributed so 

 much to our knowledge of the North American Isopoda. 



