Triuisactii'iis Socirlv Wii'iil .-Iri-liilrrls and Marine lint/inccrs, J'ol. 26, igi8. 



Plate 72 



To illiislratc f^a/^cr on "Side I .auiichiiui of Shifts on flic lircat l.tikcs," by Frank E. Kirby, 

 J\sq.. Honorary ricc-Trcsiilcnl . and lufi^'ard llo/^lcins. lisij.. Member. 



