MOUGEOTIA 85 



30. Spores ovoid 40-54/^ in length 34 



31. Diameter vegetative cells 17-24)". 32 



31. Diameter vegetative cells 32-38/11 33 



32. Diameter spores about 30 ju., wall 



wrinkled 33- ^- gotlandica 



32. Diameter spores 42-50 ji^, median 



wall scrobiculate 32. M. talyschensis 



33. Spore diameter about 39-46;",, rather 



densely punctate 40. M. daytonae 



33. Spore diameter 40-42^1, sparsely scro- 

 biculate 41. M. handelii 



33. Spore diameter about 60-68 ju 42. M. sanjordiana 



34. Spores extending into the gam- 



etangia 31 • .^- sumatrana 



34. Spores wholly in the conjugating 



tube 39- ^^- robusta 



35. Vegetative cells less than 30 /^ in diameter, pyrenoids in single 



row 36 



35. Vegetative cells more than 30 /a in diameter, pyrenoids scattered 37 



36. Diameter vegetative cells 14-22 /a, 



spores 28-36 /A X 47-58 ju, 43- .^- oblongata 



36. Diameter vegetative cells 25-29^, 



spores 19-21 /A X 19-21 /a 45. M. angolensis 



36. Diameter vegetative cells 25-28 /i, 



spores 55-64 /i X 30-34 /m 48. M. opelousensis 



37. Diameter vegetative cells 35-40 /a 46. M. laetevirens 



37. Diameter vegetative cells 43-53 M 47. M. acadiana 



38. Outer sporangium wall a thick pectic layer 39 



38. Sporangia without pectic layer (possibly present when 



young) 43 



39. Spores blue, wall with scattered scro- 



biculations 98. M. cotopaxiensis 



39. Spores blue, finely punctate 55- -^^ cyanea 



39. Spores blue, coarsely punctate 56. M. atubulosa 



39. Spores colorless, smooth 51. M. pectosa 



39. Spores yellow, brown, or chestnut brown 40 



39. Spores metallic green gy. M. chlamydata 



40. Spores yellow to brown 41 



40. Spores dark chestnut brown 42 



41. Spore wall smooth 52. M. gelatinosa 



41. Spore wall punctate 29. M. micropora 



