THE GREEN ALGAE OF NORTH AMERICA 



479 



subtilis, 191. 

 i'. tenerrima, 183. 

 v. thermarmn, 183. 

 v. variabilis, 183. 

 tenerrima, 183. 

 tenuissima, 183. 

 variabilis, 183. 



v. marina, 190. 

 zonata, 184, /pj. 

 Ulotrichaceae, 180. 

 Ulotrichales, 91, 180. 

 Ulva, 86, 87, 196, 214, 219, 220. 

 califoruica, 215. 

 clathrata, 199. 

 v. ramnlosa, 200. 

 v. Rot/iiana. 



f. prostrata, 199. 

 enteromorpha. 



v. intestinalis, 204. 

 v. lanceolata, 206. 

 fasciata, 210, 216. 

 f. caespitosa. 216. 

 f. expansa, 216. 

 f. lobata, 216. 

 f. taeniata, 216. 

 gelatinosa, 139. 

 Hopkirkii, 198. 

 Lactuca, 209, 214, 216. 

 v. Lactnca, 214. 

 v. latissima, 215. 

 v. mesenterifortnis, 215. 

 v. rigida, 215. 

 linza, 206. 

 quatenaria, 212. 

 thermalis, 214. 

 Ulvaceae, 195. 

 Ulvella, 285, 289, 290. 

 americana, 289. 

 confluens, 286. 

 fucicola, 286. 

 lens, 286. 

 prostrata, 287. 

 Urococcus, 306. 

 Foslieanus, 306. 



v. ferrugineus, 307. 

 Hookerianus, 306. 

 insignis, 306. 

 Uroueina, 188. 



confervicola, 188. 

 Urospora. 309, 368. 

 Hartzii, 369. 

 crassa, 369. 

 incrassata, 369. 

 Worinskjoldii, 368. 

 Utricularia, 88. 

 Valonia, 362, 372 374. 

 aegagropila, 373. 



confervoides, 373. 



ova I is, 372. 



ventricosa, 373. 



verticillata, 373, 374. 



utricularis, 373. 

 Valoniaceae, 371. 

 Vaucheria, 91, 350, 422, 432. 



aversa, 424. 



clavata, 425. 



coronata, 429. 



dichotoma, 425. 



Dillwynii, 423. 



Gardueri, 428. 

 f. tenuis, 428. 



geminata, 427, 428. 

 v. racernosa. 427. 



hamata, 426, 427. 



intermedia, 429. 



litorea, 430. 



longipes, 428. 



ornithocephala, 424. 



orthocarpa, 425, 426. 



pachyderina, 423. 



piloboloides, 429. 

 v. compacta, 429. 



Pi I us, 425. 



polyspernia, 424. 



repens, 425, 426. 



sericea, 424. 



sessilis, 425, 426. 



sphaerospora, 429. 



terrestris, 426, 427. 



Thuretii, 424, 429, 430. 



tuberosa, 431. 



v. intermedia, 431. 

 v. minor, 431. 



velutina, 430. 

 Vaucheriaceae, 421. 

 Vaucberioideae, 410. 

 Volvocaceae, 131. 

 Volvocales, 91, 127. 

 Volvox, 135. 



aureus, 135. 



globator, 135. 

 Xanthophyll, 91. 

 Zoochlorella, 143, 156, 305. 



conductrix, 157. 



parasitica, 157. 

 Zostera. . 



marina, 279, 288, 309. 

 Zosteroideae, 410. 

 Zygnema, 102, 311. 



anoinaluin, 103. 

 v. crassum, 103. 



b if aria, 116. 



chalybeospermum, 104. 



cruciatum, 104. 





