September, 1!>21. 



The ('anadiax Field-Xatiralist. 



113 



the evolution of. green Algae and per- '■>*.). 

 haps of all plant life. 



Sub-family Pjiacoteae. 



23. Phacotas spec, not determined. The 40. 



same difficulties surround this genus 

 as above. 



Sub-family Volvoveae. 



24. Gonium pecforale, Mull, in green scum 



in vast numbers at bottom of slough, 

 IMay. 



25. Pandorina mornm, Mull, common in 



sloughs. 



26. Eudorina elegans, Ehrenb., common in 



slough plankton. 



27. Volvox aureas (L) E'hrenb. T)iis alga 

 was to be found in vast numbers in 

 the .slough plankton during the latter 

 part of May. 



Sub-order Tetrasporine.\e. 



Family Palmellaceae. 



Sub-family Tetrasporeae 



28. Tetraspora lubrica (Eoth) Ag, on 



stones at the outlet of a small spring, 

 Summerland, May. 



Family Protococcaceae. 



29. Tmchiscia aspera (Reinsch) Hansg., 

 common in plankton. 



Family Autosporaceae. 

 Sub-family Oocysteae 



30. Oocyst is soUtaria, Wittr., slough and 

 lake ])lankton. 



31. 0. crassa, Wittr., as above. 



32. Nephrocijtium (ighordinnum. Nag"., 



from s(pieezings of a moss resembling 

 sphagnum. 



33. Teiracoccus hotrijoides. West, lake 

 plankton, April. 



Sub-family, Selenastreae. 



34. Scenedesnius bijugatus, (Turp) Kutz., 



lake and slough plankton. 



35. S. qvadricauda, (Turp.) Breb, as ab- 



ove. 



36. Ankistrodesmus setigurvs (Schrod) 



West, slough plankton. 



Order 2. Siphonales. 

 Family. Vaucheriaceae. 

 38. V. gemmata (Vauc^) DC. Dog Lake 

 in ditches. Vaucheria grows in felty 

 masses like moss and may be recog- 

 nized from other algae with the naked 

 eye. 



Order 3. Siphonocladiales. 



Family Cladophoraceae. 



Sub-family Cladophoreae. 



41. 



42. 



43. 

 44. 



45. 

 46. 

 46. 

 48. 

 49. 



50. 

 51. 



52. 



5;5. 



54. 



55. 

 56. 



( ladoplio (I c ispalii, Kotli. Pcntieton 

 Creek, Sept. 



Sub-family Rhizoclonieae, 

 Rhizoclonium hierogbjphicum, (Roth) 

 Kutz. .slouglis, also Marron I.,ake. 

 Order 6. Ulotrichales. 

 Family Ulotric^iaceae. 

 Ulothrix zomtta, (Web & Mohr) Kutz., 

 common, found in many stations at all 

 seasons. 



U. subtilis, Kutz., Okanagan Falls, 

 Apr., growing on stones under water, 

 where current was swiftest about 12- 

 15 miles per hour. 



Family Microsporaeeae. 

 Microspora tumidula, Hazen, Dog 

 Lake, entirely an American species. 

 M. stagnorum, (Kutz) Lagerh., com- 

 mon in pools more or less .stagnant. 

 Family Chaetophoraceae. 

 Sub-family Chaetophoreae. 

 Chaetophora pisiformis. (Roth) Ag. 

 growing on a floating board. Sloughs. 

 f\ clegaiis (Roth) Ag. growing on a 

 dead stick, sloughs. 

 C. clcgans (Roth) Ag. growing on a 

 zen. Dog Lake on a .submerged log. 

 Draparnaldia plumosa (Vauch) Ag., 

 free floating Ok Lake. 

 Droparualdia glomerata, (Vauch) Ag., 

 on dead tule (Scirpus spec.^ Pen 

 slouglis. 

 M)/.io)iema tenue (Ag) Kutz., Ok Lake. 



Sub-family Microthamnieae. 

 ]\Iicroiham)}ion Kiitzingianum, Xag., 

 on dead tule (Scirpus spec.) slouirhs. 

 Division II. Akontae. 

 Order 1. Conjugatae. 

 Family Zygnemaceae. 

 Sub-family Mesocarpeae. 

 Mougeotia spec. This genus is quite 

 common, sterile filaments only. 



Sub-family Zygnemeae. 

 Zi/gnemn ericetorum (Kutz) Hansg.. 

 in drying pond by Okanagan River. 



Sub-family Spirogyreae. 

 Spirogi/rn tetuiissima, (Hass) Kutz., 

 ponds Penticton Creek, May. 

 ^f. inflata (Vauch) Rabenh., as above. 

 ^S. nitada (Dill) Link.. dit«^hos Pentic- 

 ton, April. 



The family Zygnemaceae is perhaps 

 the most widely scattered and by far 

 tilt" most noticeable of all the algae. 



