McALLISTER: MORPHOLOGY OF THALLOCARPUS 125 
LITERATURE CITED 
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va classificazione 
Explanation of plate 4 
The magnification of the figures is about 250 diameters, with the exception of 
Fic. 1, which is magnified about 30 diameters. 
Fic. 1. A portion of a section of a thallus, 
Fics. 2,3. Early stages in the developm 
Fic. 4. Archegonium, not quite mature, 
of the thallus. 
Fic. 5. Archegonium after fertilization of the e 
Fics. 6, 7. Early stages in the development of ee antheridium. 
Fic. 8. A four-celled embryo sporophyte. 
showing a sporophyte, nearly mature. 
ent of the archegonium. 
becoming submerged by outgrowths 
