i6o 



NEW YORK STATE MUSEUM 



when the stone is raised, jerks itself along on its sides till it gets 

 under some projecting surface. It is common all along the shores 



Fig. 28 Gammarus locusta 



Up to the Arctic regions, and farther north attains a larger size than 

 it does here. 



Length 10— 13 mm. Color green and brown of varying shades. 



Gammarus fasciatus Say 



Gammarus fasciatus Say, T. /. c. 1818. i :374. Smith, S. I. U. S. 

 Fish Com. Rep't for 1872-73. 1874. p. 653. 



Fig. 29 Gammarus fasciatus 



