PLATE 48 



Urophlyctis alfaljae: 



A-D. — Peripheral portions of actively growing thallus of parasite dissected from 

 living host: ta, tb, tc, turbinate cells of successive orders; ra, rb, resting spores pro- 

 duced by successive orders of turbinate cells; tbx, peripheral segments beginning to 

 proliferate turbinate cells by budding. Note the single apical haustorium on the 

 developing turbinate cells tc; its median position on the isthmus connecting turbinate 

 cell tb and developing resting spore rb; its absence from isthmus between evacuated 

 turbinate structure B, D, ta, and maturing resting spore B, D, ra. Note also zonate 

 arrangement of haustoria between equator and distil pole of resting spore, A-D, ra, rbs. 



E. — Nearly mature resting spore viewed from distil side, showing 11 haustoria in 

 zonate arrangement. 



F. — Mature resting spore viewed from distil pole, showing 13 pits that mark former 

 location of haustoria. 



G. — Mature resting spore viewed in profile, showing pits in zonate arrangement and 

 light concavity on proximal side of spore. 



Drawn with the aid of the camera lucida. Approxiately X 847. 



