Plate XX\'11 : Fi(;s. 250 m jz^y -. Macmfied 500 Diameters. 



O.vyfric 

 O.vyfric 

 O.vylrii- 

 O.vytric 

 O.vytric 

 O.vytric 

 O.vytric 

 O.vytric 



I hi I (trill .Stokes p. 59 



/ falla.v Stein ]>. 59 



if parvistyla Stokes p. 59 



/ f^iirristyla p. 59 



/ liyniciiostdiiiit Stokes p. 59 



' ^P- < ') P- 59 



1 bifaria .Stokes p. 59 



/ bifaria p. 59 



