Dinoflagellates (Ccratiiim tripos), xca. 20. (p. 114). 







t^-&2'M 





s»-'^4i^:'S^ 



^^<5^.>%^ ^^' 





Photo. D. p. ll'i/sou. 



PL 46. ^ 124. 



Spring Diatom Plankton X44. Chiefly C^j««^^//j<:«^ and ^/VW«///'/'i. 



(p. 113). 



