Populus spec. — Potaraogeton pectinatus L. 
159 
Populus spec. — Diluvial, Ohlsdorf — St oller (1), p. 118. 
Populus spec. — Miocän, Lugarde — Marty (2), p. 395, 396. 
Populus spec. — Tertiär, Canada — Penhallow (4), p. 27, 28, 75, 98, 113, 118, 134 
— Penhallow (1), p. 323. 
Populus — Verbreitung im Tertiär um Frankfurt — Engelhardt u. Kinkelin (1), 
p. 182. 
Porana macrantha Ludw. — Unterschied von P. tenuis Lx. — Cockerell (3), 
p. 107. 
Porana oeningensis (A. Br.) Heer — Unterschied von P. tenuis Lx. — Cocke¬ 
rell (3), p. 107. 
Porana speirii Lesq. — Tertiär, Florissant — Cockerell (3), p. 107. 
Porana tenuis Lx. (Convolv.) — Tertiär, Florissant; Abb.; Beschr. — Cocke¬ 
rell (3), p. 107. 
Poroxylon — Gefäßbündelhau — Tansley (1), p. 35, 36. 
Poroxylon Sutcliffi Scott mnscr. — Lower Coal Measures, Roof nodules, Lanca- 
shire und Cheshire — Stop es und Watson (1), p. 205. 
Potamogeton acutifolius Lk. — Diluvial, Lichwin, Rußland — Sukatsche ff(l), 
p. 136. 
Potamogeton crispus L. — Diluvial, Lichwin, Rußland — Sukatscheff (1), 
p. 136. 
Potamogeton crispus L. — Preglacial, England — Reid (3), p. 211, 227, PI. 15 r 
Fig. 157, 158. 
Potamogeton densus L. — Diluvial, Motzen — Stoller (1), p. 108 — Ohlsdorf 
— ibid., p. 118. 
Potamogeton filiformis Pers. — Diluvial, Motzen — S toll er (1), p. 108. 
Potamogeton fluitans Roth — Diluvial, Ohlsdorf — St oll er (1), p. 118. 
Potamogeton cf. fluitans Roth — Diluvial, Motzen — Stoller (1), p. 108 — 
Ohlsdorf — ibid., p. 118. 
Potamogeton geniculatus A. Br. — Tertiär, Frankfurt — Engelhardt u. 
Kinkelin (1), p. 182. 
Potamogeton gramineus L. — Diluvial, Motzen — St oll er (1), p. 108. 
Potamogeton heterophyllus Schreb. — Preglacial, England — Reid (3), p. 211,. 
227, PI. 15, Fig. 154. 
Potamogeton cf. lucens L. — Diluvial, Ohlsdorf — St oll er (1), p. 118. 
Potamogeton miqueii Geyl. et Kink., Senckenb. Abh., XV, p. 20, Taf. II, Fig. 4, 
5, 6a, b — zu Viscophyllum miqueii G. et K. sp. — Engelhardt u. 
Kinkelin (1), p. 247. 
PotamogetonnatansL. — Diluvial, Lichwin, Rußland — Sukatscheff (1), p. 136. 
Potamogeton natans L. — Diluvial, Motzen — S toll er (1), p. 108 — Ohlsdorf 
— ibid., p. 118. 
Potamogeton natans L. — Diluvial, Rußland (Don) — Droboff (1). 
Potamogeton natans L. — Diluvial, Shetland — Lewis (1), PI. III, Fig. 8 — 
Allgemeiner Teil — ibid., p. 64. 
Potamogeton natans L. — Preglacial, England — Reid (3), p. 211, 220, PI. 15,. 
Fig. 153. 
Potamogeton cf. natans L. — Diluvial, Werlte — S toll er (1), p. 112. 
Potamogeton obtusifolius Mert. et Koch — Preglacial, England — Reid (3), 
p. 211, 220, PI. 15, Fig. 159. 
Potamogeton pectinatus L. — Diluvial, Motzen — St oll er (1), p. 108 — Ohls¬ 
dorf — ibid., p. 118. 
Potamogeton pectinatus L. — Diluvial, Shetland — Lewis (1), p. 50, 53 — 
Allgemeiner Teil — ibid., p. 60. 
