5 i 2 



PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



durcd into a prominent acute tooth, above which the margin is 

 bisinuate. Dorsal side of fourth abdominal segment with a shallow 



I'm. 21. — Ampblisca pacifica female. gn 2 , second gnathopod ; p", second per^eopod. 



Ampelisca pacifica, female. ab 3 , third abdominal segment; md, mandi- 



: mxp, III' n|- MAXILLIPED ; p 5 , FIFTH PBB2BO] ; I, TBLSON : »/'i, FIRST DROPOD ; II )\ it 



THIRD I KOI 



concavity near the middle, behind which it is somewhat elevated ; the 

 other segments smooth above, 



