NAIXTS AM) //.l/.77'S OF TEOPICAL FISHES 



87 



llOWl'VlT. till' UllM'Ulld 



pivssioiis boeomos ap 

 pirted relations arc n<>1 

 iiicroasiiiulv jtrobaMc 

 studies (if lln' cnlur.-il i( 

 yield result- of llieiUTt 



It is dcUMUi-l I'idile I 

 stoiiuu-h eoiitents of f 

 mens taken at ditl'ere 

 day, that the \arious s| 

 one anothei- with refer 

 and phlee of tlicii' fe 

 upon liottonis tt)h'ral 

 ehai'aeter and not too 

 the o|)eration. «rives im 

 ahh' information sup 

 «;ained l)y livin,^- will 

 hours in succession iik 

 In view of data 

 l"i-on\ rhese various 

 sources, it is not 

 open to question 

 that the groups of 

 fishes one finds 

 swimmino^ togetlier 

 ahout the larger 

 masses of coral are 

 of the same hetero- 

 geneous nature as 

 the crowds one 

 meets on any busy 

 city thoroughfare ; 

 they differ from 

 one another in 

 habit as the people 

 differ in occupa- 

 tion. 



"When the fishes 

 are classified by 

 habit, a nundier of 

 interesting rela- 

 tions are revealeil. 

 Variation in color 

 within the different 

 grou])s is less tlian 

 in random samples 

 of the same size 

 from the general 

 human population. 

 Particular colors, in 

 other words, are cor- 



pa 



Camera container for submarine pliotograpliy. Tlie mirror projecting 

 in rear view from tlie top of the focusing hood enables one witliout bend- 

 ing over to see the doubly reflected image of objects within the field of 

 the camera. The rods with milled heads are for focusing and for releas- 

 ing the shutter. Both are protected by stuffing boxes. A soft rubber 

 gasket lies between the cover and the body of the box. All other points 

 are permanently sealed by solder or cement. The cubical body of the box 

 is eight inches on the side, and the wciglit of the whole apparatus in air 

 is about fifty pounds 



