AMPHIPODS 



^n 



on the inner margin with fine spinules and furnished with about five short 

 setae. Second gnathopods with the merus rounded below, the carpus 

 broader than long, with a narrow, setose posterior lobe ; hand large, 



Fig. 121. Ste7iothoe alaskensis. 



about as long as all the preceding joints, widening distally; palm 

 obhque, terminated with a strong spine at the posterior end, deeply 

 excavated in the middle and having a prominence on either side of the 

 excavation. Coxal 

 plate of the first 

 peraeopods nearly 

 three times as deep 

 as wide and about 

 twice as deep as 

 its segment ; coxal 

 plates of the sec- 

 ond peraeopods 

 very large and sub- 

 triangular. Pos- 

 tero-lateral angle 

 of the third abdom- 

 inal segment pro- 

 duced backward as 

 a triangular lobe. 

 Rami of the first pair of uropods equal and about two thirds the length 

 of the peduncle ; outer ramus of the second pair two thirds the length of 

 the inner one, which is considerably shorter than the peduncle ; third 



Fig. 122. Stenothce alaskensis. 



