CONTENTS. 
& 
Page. 
Obyeet and Scope of bie aig etal atta ea 617 
Some factsiin the reprodtiction and life ‘history of musselS=_ 2 2-5-2222 22 = ee 618 
Breeding: Seasons, 97 22 JF oo woe ee ee ee or ia aa 620 
‘he lanva, or glochidtumis ==, 22 a0) ee ee 621 
implantation of the glochidia= =! = <= 2-2 2566 See ee oe ee ea ee 622 
Expenmmentaliinfecttons= == Set ee oe ee eee eee 622 
Method) S52 2 = Soe sort Sa ee Se ee 622 
Behavior of the fishes—Their susceptibility and resistance_______-_-_------------------ 623 
Duration of the parasitic period ~ G2¢ 
Post-Jarval erowthyef -muscels2. 2-22 ee 8 eh ee ee 
Infection ofdargesremmi bers of fib ae epee er a 626 
616 
