56 VT aE HOE DOGO AGE AE 
635" Wallsofioospore smooth ape sats 10a cate eee ne Eee nee 64 
Oda otfoospore:lomenitu chimealliltvarrst oye Ge a eee eerie ee 116 
63% Walliotoospore:anrcOla tenet pon. oa. Ree 129 
G3 Wialilkoioosporesmeticullaite nu at. &.n - Weiess enc = acacia eee eee 131 
63:0 Waillvoiioosporetpiitedhaok, «05 a Se hac bye ain sis cos Je te ee eee 132 
63. Walltoioosporeisenobicullaite:. 7 52 arr a. ere on een Sencar eee eee 133 
G4a@ Mon Geciouset ett sc. och ap PC aoe a NE ee eee 65 
G4 ADIGECIOUSH ei es S 55g bd oy Oa he ee ee 83 
64. Reproductive structures imperfectly known....................... 113 
65. Diameter ot vezerauive celliS—o4 0.5. see fee nee ee eee 66 
65. Diameterol veretative cellis3—540. 2. . a. cise de ee eee 80 
665 Diameter of cogonitum»s2—s6)(—40))u25 5-4 a eee eee 67 
665) Diameter of oogomium:s0-OSstee 1. 4a ee ee eee 70 
66. Diameter of oogonium 63-68yu... 29a. Oe. upsaliense var. fennicum 
Of... VegetativercelliS=l4inidiametens 49s. see are tone eae re ee 68 
67. Vegetative cell 15-18u in diameter................ 19. Oc. intermedium 
68. Length of oogonium 32-46u................ Fti4 Oe scar ar AN ae a A 69 
68. Length of oogonium about 53u.............. 226. Oe. warmingianum* 
69° Oospore 28-3illeamidiameter- 4...) 525.55 eee ennee 20. Oc. hirnw 
69. Oospore 30-37 (—40)u in diameter.................. 21. Oe. globosum 
(Os elanttewrcelledswhentmatune: see ener ee eee ee 71 
(On selantamany celled whenimattine ease an: eee eee nee: 72 
71. Antheridium single, alternating with vegetativecell. 22. Oe. zigzag 
(ineAnthendium'=l—4 imiseniest..--eereenee aaa 23. Oc. curtum 
2. Oospore globosesto;subelobosess1.-0 06 5 eee eee eee ee 73 
(22 Oospore Obovoidetorelllipsaicd aaa tei eer eee ee 77 
das Diameternonvesectativie cellu 101i. nae ety a nee eee 74 
(a> DiameteronveretativierCellelO=o4rcgaa irae aes eee nee 76 
(4, ‘Oospore completely fillingioogonitim..-) 4. nos ssee eee ee 75 
74. Oospore not filling oogonium.... 19a. Oe. intermedium var. fennicum 
OO: > pA Me THelacI Lassen. cs, egy: Seer en ee ge een 24. Oe. fragile 
(on eAnthertdiuimyo—-Ole. sence aoeeeee 24a. Oe. fragile var. abyssinicum 
76. Oogonium usually globose...... 24b. Oe. fragile var. robustum 
(Op Oogonium»usualllyxovoldeasn een tern eerenitr 25. Oe. vaucheru 
77. Division of antheridium horizontal................ 26. Oe¢e. richter1anum 
i”. “Division of antherndium vertical: .6+. 30.5... <,.4e eae ee 78 
78. Vegetative cell 8-14u in diameter........... 27. Oc. pseudobosci 
ios  Wegetativelcell 14-24. “inidiameten seen seen ae eee eee 79 
(95 Oogontam 40-44 >< 70=S80n. ee eee aeons 28. Oe. sodiroanum 
195, Oozontum 45-50 << 66-100n Sena cements ee sare 29. Oe. upsaliense 
(9s Oosonimm48—b5 \Gb=e0u pee ee ee eee 30. Oc. oviforme 
SOs Diameteror OocOnitm Od Ole aaa eee ene ee 81 
8058 Diameter of cozoniumiG8—9due. «eee eee eee 82 
81. Diameter of vegetative cell 37-48u................ 31. O68. geniculatum 
81. Diameter of vegetative cell 50-54u................ 32. O8c. subocitangulare 
82. Diameter of vegetative cell 33-37y.......... 33. O80. martinicense 
82. Diameter of vegetative cell 44-52u.......... 34. Oc. kurzuw 
83. Diameter of vegetative cell 11-l3u................ 223. Oe. lageniforme* 
83. (Diameter otvegetativercellil4—bGi ee eee ee eee eee nee 
84. Oogonium scarcely exceeding vegetative cell in diameter.......... 85 
84. Oogonium noticeably exceeding vegetative cell in diameter........ 86 
85. Oospore globose to cylindric-globose.............. 35. Oe. capillare 
85. Oospore cylindric-globose to subcylindrical, 
35a. Oe. capillare f. stagnale 
85. Oospore subrectangular-ellipsoid.................. 32. Oc. suboctangulare 
86. Oospore globose, subglobose, or cylindric-globose................. 87 
86. Oospore ellipsoid, obovoid, subcylindrical, or subellipsoid......... 95 
8@ Maleiilament of samevdianietenaspremial Gn. seeerrn) are eee: 88 
Si.) Maletilamientismealilersthan) females nmi. (1 eee er eee eee 90 
88. Oogonium 36-42u in diameter... 36a. Oe. plagiostomum var. gracilius 
88. Oogonium 42-49 in diameter............... 36. Oc. plagiostomum 
Sos Ooconium 54-68 in cdiameen ss ane eae aoe ae eee eee 89 
*See footnote, page 53. 

