N... ic,-4. AMPHIPODA FROM WEST VORTH VMERICA HOLMES. 539 



palpi of the maxillipeds are characters seldom mel with and never in 

 combination in other groups. The mandibles also are unusual in 

 having a very broad cutting edge and in having a number of small 



Pig. 44. Stilipbs distincta. «/»,. pibst qnathopod; gn b sbcond gnathopod; 



/•:,. FIFTH PBRiBOPOD. 



acute tooth only on ono side. Both of tho first antenna' were broken 

 off and the length of these appendages could not be determined. 



Family GAMMAKID2E. 



M-ffiRA DUBIA Caiman. 



A single specimen from Station t523, Monterey Hay. 7f>-10S 

 fathoms. 



M./ERA SPINICAUDA. new species. 



Eyes oval or round. First antenna 1 nearly half the Length of the 

 body, the firs! joint about three-fourths the length of the second; 

 flagellum not as long as peduncle; secondary flagellum long, com- 

 posed of eight to ten joints. Second antennae about two-thirds as 

 long as the first : last joint of the peduncle about two-thirds the length 

 of the preceding one: flagellum about as long as the penultimate 

 joint of the peduncle. 



First four side plates about as deep as wide, the first produced 

 forward into an acute angle. Second gnathopods large, unequal; the 

 larger one with the carpus broader than long, with a narrow, setose 



