64 
253. 
253. 
255. 
255. 
255. 
257. 
257. 
259. 
259. 
261. 
261. 
263. 
263. 
265. 
265. 
267. 
267. 
269. 
269. 
res Of DOG ONACE EAD 
Diameter of vegetative cell 7-I2u................. 181. Oc. hoersholmiense 
Diametenonaecetativie Cel lel4— 32 amt mie set tess en earns 254 
2545" Menminailicell’setitorme.... sons ses ol Son Oemcianim 
D254 herminalkcell notiseuttonmasse nee oe cn ec ere 255 
Diameter OMOOSpOLeLZI—O2 Un eee tine aries 207. Oc. flexuosum* 
Diameterok OoSporeie2=420." ay aon olen ae eer One ere ree 256 
Diameter of oospore 41-4802 a= eee eee ate 186. Oc. spectabile 
256. ) Viezetauiviercells7¢ to) 3) diameters ong ans ary eee ee eee Zo 
256. Vegetative cell 3 to 5 diameters lhevaker ee 3 187. Oc. implexum 
Oozconium: clobese-obovoidee aaa aes ee 208. Oe. fonticola* 
Oogonium subglobose. . Sacooogaano slits, (Oke. yolnaualle 
258. Diameter of oogonium 30- 39u. Fe cincad sie ead ood in: CO en 259 
258 a DiameteromooZonitime40—o0 Lj eeies ee aise ena eee eee 260 
258. Diameter of oogonium 56-68u...188b. Oe. monile var. eminens 
Swrucgbilivonay, Cellll qnbiaawGl ace occ asskaaconsounssaues 188. Oc. monile 
Suffultory cell not tumid.......:. 184f. Oe. macrandrium var. scrobiculatum 
260. Suffultory cell 27—28u in diameter.188c. Oe. monile f. victoriense 
260. Suffultory cell 35-884 in diameter.188a. Oe. monile f. borgei 
Oosporezwall’smooth Gos. sak Ao igs ORES Ce EET are 262 
Oospore wall longitudinally ribbed! 225.422 e oe eae 264 
262. Diameter of oogonium 30-86y.....:......... 181. Oc. hoersholmiense 
2625 Diameter Or ooconitims 42-5511 sn seers eens yarn ae ea 263 
262. Diameter of oogonium 55-58u...189a. Oe. obtruncatum var. completum 
Wenethomoozoniumipb—-O8u-e sae eee ee 189. Oe. obtruncatum 
Length of oogonium 68-75y...... 189b. Oe. obtruncatum var. ellipsoideum 
264, Ribs M-l/anmumbers... - 195b. Oe. acrosporum var. bathmidosporum 
264%) JRibst23—380)dnlaamalbberye cfr acrec sa casts cle ce Oe ae eee nae eine 265 
2645) .Rabs40—45 sin numbers. os. ae 193. Oc. tentoriale 
Vegetative cell 7-8u in diameter...... 195c. Oe. acrosporum var. floridense 
Veretatnvercelllol2—2ilsinrdianm' eters sacs err eee eee 266 
266. Plant usually less than 10-celled.195a. Oe. acrosporum f. boreale 
266s eblantusuallly amonresinanel {Celle clearness reer eae 267 
Diameter Ofoogonium) Jo-48u.- aes eei 195. Oe. acrosporum 
Diameter of oogonium 44-56u.........195d. Oe. acrosporum var. majusculum 
268; (Oospore wall smoothies hele eee ee ee eee 269 
268. Oospore wall punctate.......... 4lce. Oe. fabulosum var. punctatum 
Vegetative cell 56-70u in diameter.... 41b. Oe. fabulosum var. columbianum 
Vecetativercelle/0-93 ul inndiametery see: sem cic eee ee ioe tee 270 
ZO @ospore globose tovellipsoideee ener eer 41. Oe. fabulosum 
270. Oospore subglobose to subcylindrical, 
41a. Oe. fabulosum var. maximum 
*See footnote, page 53. 
