No. 1594. FOUR NEW AMPHIPODOUS CRUSTACHA—PEARSE. 31 
of pereeon; first segment half as long as second, third two-thirds 
as long as first; flagellum longer than peduncle, 14-segmented. 
Second antennse more slender than first, third. segment twice as long 
as first two; flagellum 2-jointed, penultimate twice the length of 
ultimate joint. Mandibles, with two plates, each bearing 5 teeth, 
Fic. 4.—PROTELLOPSIS STEBBINGII. @b, ABDOMEN; gi, GILL; g;, FIRST GNATHOPOD OF MALE} gy, SECOND 
GNATHOPOD OF MALE; go, SECOND GNATHOPOD OF FEMALE; ™m, MANDIBLE; mp, MAXILLIPED; 7pj, FIRST 
PERXOPOD; p3, THIRD PERHOPOD; p;, FIFTH PERAOPOD. 
prominent molar tubercle with strongly denticulate crown. Maxil- 
lipeds, with inner prismatic plate very small, bearing 2 small 
teeth and 4 apical spines; outer plate almost three times as long 
as inner, bearing 1 apical spine and 2 others near the inner 
distal margin. First gnathopoda of male, palm lamellate, finely 
denticulate and armed with many spines. Second gnathopoda with 
carpus subequal to merus, palm concave with proximal angle greatly 
