MOUGEOTIA 83 



7. Spores globose to ovoid, variable in 

 position, some extending into and di- 

 viding one or both of the gametangia 5. M.calcarea 



8. Spores colorless with thick outer 



pectic layer 7. M. victoriensis 



8. Spores brown 9 



8. Spores blue 11. M. f^erguelensis 



9. Diameter spores 7-8 /u^, outer wall brown i. M. angusta 

 9. Diameter spores 13-24 /x, outer wall 



brown 3- ^« parvula 



10. Spores ovoid, longer axis ii-i5iu... 2. M.tenuissima 



10. Spores asymmetric, ellipsoid or do- 

 lioform, longer axis 30-42 /a, outer 

 sporangium wall a thick pectic layer 4. M. tubijera 



10. Spores ellipsoid, longer axis 20-28 /i- 6. M.elltpsoidea 



II. Spores variable in position in the con- 

 jugating tube or dividing one or both 



gametangia 5. M. calcarea 



II. Spores globose or subglobose 12 



II. Spores ovoid to quadrate-ovoid 16 



12. Spores blue, vegetative cells about 



i2iu. in diameter 11. M. \erguelensis 



12. Spores blue, vegetative cells about 



17-22 /A in diameter 12. M. maltae 



12. Spores brown or yellow 13 



13. Filaments mostly less than 20 /x in diameter 14 



13. Filaments mostly more than 20 yu, in diameter 15 



14. Spores globose, contained in the 



conjugating tubes 8. M. recurva 



14. Spores globose, extending into the 



gametangia 10. M. drouetii 



14. Spores globose, ovoid or ellipsoid. . 9. M. adnata 



14. Spores rhomboid, usually lateral 



conjugation i3- -^^ reinschii 



15. Diameter of spores about 30-40M 15. M.scalaris 



15. Diameter of spores about 40-45/x 14. M.sphaerocarpa 



15. Diameter of spores 47-52 /x 16. M. jogensis 



16. Spore diameter about 24-30 ju-, con- 

 jugation mostly lateral i3- ^- reinschii 



16. Spores 36-40 /x X 40-55 jU, diameter 



vegetative cells 19-24 /x 14. M. sphaerocarpa 



