EXPLANATION OF PLATES. 641 



Plate "jt. 

 Erichsonella filiformis (Say). 

 Upper figure dorsal view, copied from Harger (Rep. U. S. F. Com., VI, 

 1878, PI. 7, fig- 38). 



Erichsonella attenuata (Harger). 



Lower figure dorsal view, copied from Harger (L. c, PI. 6, fig. 36). 



Plate 78. 

 Edotia triloba (Say). 

 Left figure dorsal view, copied from Harger (L. c, PI. 7, fig. 42). 

 Idotea metallica Bosc. 



Right figure dorsal view, copied from Harger (L. c, PI. 6, fig. 30). 



Plate 79. 



Idotea balthica (Pallas). 



Original. Left figure dorsal view, middle figure lateral view, and right 

 figure ventral view. Ocean City, N. J. June 21st, 191 1. W. B. Davis and 

 H. W. Fowler. 



Pl.\te 80. 



Chiridotea cceca (Say). 



Right figure dorsal view, copied from Harger (L. c, PI. 4, fig. 16). 



Cilicsea caudata (Say). 



Middle figure male, right figure female, both dorsal views. Copied H. F. 

 Moore (Bull. U. S. F. Com., XX, pt. 2. 1902, PL 10, figs. 5 to 8). 



Pl.\te 81. 



Sphaeroma quadridentatum Say. 



Left figure dorsal view, copied from Harger (L. c, PI. 9, fig. 53). 



Ancinus depressus (Say). 



Right figure dorsal view, copied from H. Richardson (Proc. U. S. Nat. 

 Mus., XXXVL 1909, fig. I on p. 175). 



Plate 82. 

 Cassidisca lunifrons (H. Richardson). 



Original. Left figure dorsal view, right figure ventral view. Chester River 

 banks at Chestertown, Kent County, Md. November, 1912. E. G. Vanatta. 



Plate 83. 

 Limnoria lignorum (Rathke). 



Lower right figure dorsal view, copied from Harger (L. c, PI. 9, fig. 55). 

 41 MU 



