Trans. Wis. Acad., Vol. XI. 



Plate XXXVIII. 



18 m 



Fig. 28.— Percentile vertical distribution of Crustacea, March. 1-15, 

 1895; August 1-15, 1896; October 1-15, 1896. See p. 390. 



March .... 



Aug »— . 



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