Bull. U. i-!. r>. F., 1919-20. 



Pl.WE XIV. 



(Figures from Leftvre aud Curtis, 1912.] 



Figs, i aud 2. — Hooked glochidium olSymf>bynota coslata. 



Figs. 3, 4, and 5. — Hooklcss trlochitliumof Lampsilis s^ihro- 

 sirata. 



Figs. 6 and 7.^Ax-licad i:locliidiuni of Lainpsi/is {Prop- 

 ter a) a lata. 



FiG.S. — Con?rlutinates (masses of glochidia) from the three- 

 horned warty-back. Ohliquaria reflexa. 



Fig. <>- — Portion of conirlutinate of Obliquaria reflexa, 

 magnified. Glochidia still within esg membranes which 

 are closely pressed and adhering together. 



Fig. 10.— Conglutinates (masses of glochidia) from the 

 mucket, LovipxUis lioantcntina. 



Fig. ii. — Portion of conglutinate of LamPsilis liaamentina 

 magnified. Glochidia inclo.sed in membranes are embedded 

 in a mucilaginous matrix. 



