Shoemaker — Three Amphipods from Southern California. 159 



nences. The one at the rear having two setules on the posterior border. 

 First gnathopod with side-plate widened distallj' and lower corners 

 broadly rounded. Lower margin provided with double row of fine setae. 

 Dactyl with row of setules on back margin. Second gnathopod longer 

 than first. Side-plate having sides nearly parallel and lower corners 

 broadly rounded, double row of setae on lower margin. Dactyl having 

 row of setules on back margin. First peraeopod witli back margin of 

 second joint provided with several long setae. Front and back margins 

 of fourth, fifth, and sixth joints crowded with long plumose setae. 

 Dactyl longer than fifth and sixth joints together. Second peraeopod 

 having side-plate widest. Second joint with lower half of back margin 

 provided with long plumose setae. The back margin of the third joint, 

 and the front and back margins of the fourth, provided with plumose 

 setae. Back margin of fifth joint, and front margin of sixth, provided 

 with plumose setae. Dactyl longer than fifth and sixth joints together. 

 Third peraeopod lias front margin of second joint provided with a row of 

 plumose setae. Fourth peraeopod has three or four plumose setae about 

 the middle of the front margin of the second joint. Fourth joint of fifth 

 peraeopod produced downward posteriorly into a deep lobe, the back 

 margin of which is provided with long plumose setae. The fifth joint 

 has a small notch containing several small spines about one-third the 

 distance from the lower front edge. First uropod has the inner margin 

 of the inner ramus provided with a row of spines. Second uropod has 

 the inner margin of the inner, and the upper margin of the outer ramus 

 provided with short spines. Inner ramus of third uropod slightly longer 

 than outer. Both rami broad at the base, tapering to a point. Edges 

 of rami smooth and provided with long plumose setae. Telson broad 

 and oval and divided about two-thirds of the distance to the base. Lobes 

 with outer edge evenly curved, each having a shallow notch containing 

 two setules at its apex. 



Female. — First antennae short, reaching beyond middle of fifth joint of 

 second antennae. Flagellum 6-jointed. Second antennae with flagellum 

 about twice as long as peduncle. Flagellum 32-jointed. The first two or 

 three side-plates are bordered below by plumose setae. The posterior lobe 

 of the fourth joint of the fifth peraeopod is somewhat longer than in the 

 male, reaching almost to the bottom of the fifth joint. The dorsal de- 

 pression in the middle of the fourth abdominal segment is not so deep as 

 in the male. The outer edges of third uropods provided with setae 

 which are not plumose. The inner edge of each lobe of the telson con- 

 tains one or two setules. 



Length. — Male about 7 mm. ; female about 10 mm. 



Locality. — Ofi" Venice, Southern California. 



Type.— Cat. No. 49594, U. S. N. M. 



Family Photid.i;. 

 Podoceropsis concava new species. 



Male. — Eyes oval or slightly reniform. Antennae missing, all except a 

 few basal joints. Gland cone of second joint of second antennae long, 



