522 INDEX. 
Psendocalanus elongatus, 165. 
Psilophyton f, Daws., mentd., 377. 
— princeps T, Daws., cuticular struct., 
377-385 ; comp. with Khynia and 
Asteroxylon, 383. 
— — var. ornatum +, Daws., 877. 
Psoroma araneosa, Nyl., 81. 
— sp, 8l. 
— sphinctrinum, Nyl., 81. 
Pteridium aquilinum, Auhn, mentd., 227. 
Pterosiphonia, Falkenb., mentd., 305. 
— thuyoides, Schwartz, mentd., 506, 
Pyrenula nitida, Ach., 72. 
Pyrenulaceæ, 72. 
Pyxine Cocoës, Nyl., 87. 
— — var. sorediata, Tuckerm., 87, 
— Meissneri, Tuckerm., 87. 
— — subsp. connectens, Wainio, 87. 
— retirugella, Nyl., 87. 
Quercus, Zinn., mentd., 243; fossil pollen, 
452-504. 
— Robur, Zinn., mentd., 418, 490, 422. 
— sessiliflora, Salisb., mentd., 418, 420. 
Radiofilum conjunctivum, Schmidle, 4, 10. 
Radula Delessertii, Steph., 30. 
— Farmeri, JV. H. Pearson *, 29, 44. 
— lacerata, Steph., 29. 
— nigra, JV. H. Pearson *, 31. 
— sinuata, Gottsche, 30. 
— Vieillardii, Gottsche, 30. 
Ramalina calicaris, Fr., 86. 
Ranunculus acris, Linn., mentd., 483, 
— aquatilis, Linn., mentd., 2. 
— Ficaria, Zinn., mentd., 133. 
Reticularia entorantha, Berk., 95. 
Rhacomitrium peat, 489. 
— lanuginosum, Prid., mentd., 466, 473. 
— sp., mentd., 473. 
Rhamnus, Tourn., fossil pollen, 453. 
Rhizoclonium hieroglyphicum, Aütz., 61. 
Ithizophidium sp., mentd., 480. 
Rhizosolenia, Zhrenb., 151, 152, 153, 154, 
155, 169. 
— hebetata, Bail., mentd., 156. 
— longiseta, Zach., 4, 9. 
— semispina, Mensen, 148, 153, 154, 156. 
— Shrubsolii, Cleve, 153, 154, 
— spp., mentd., 145. 
Rhizosolenia Stolterfothii, Cleve, 153, 154. 
Rhododendron, Zinn., sp., mentd., 2. 
Rhodophyceæ, 45. 
Rhopalodia gibba, O. Müll., 60, 
— ventricosa, O. Müll., 60. 
Rhyniat, Kidst. $ Lang, comp. with 
Psilophyton, 383. 
— Gwynne-Vaughanit, Kidst. $ Lang, 
mentd., 383, 
Ricasolia interversans, Nyl., 82. 
Riecardia lobata, Schiffn., 18. 
— viridissima, Schitfn., 16. 
Rinodina peloleuca, Miill.-Arg., 87. 
— peloleucoides, A. L. Sm. *, 87, 
Rivularia Hæmatites, Ag., 55. 
— natans, Welw., 345. 
— spp., mentd., 335, 
Rivulariacer, 55, 345. 
Rosaria, N. Carter *, 51, 54. 
— ramosa, N. Carter *, 51, 54-55. 
Rowan, fossil pollen, 485, 
Ruffordia Gæpperti t, Sew., distrib., 934. 
Rumex Acetosella, Zinn., mentd., 479, 483. 
Rytiphlæa fruticulosa, Harv., 305. 
— pinastroides, Ag., mentd. as host, 296, 
300, 301. 
Sagenaria dichotoma, Geinitz, sp. dub., 
180, 204. 
— ophiurus, Brongn., 197. 
Sagitta bipunctata, Quoy § Gaim., 64. 
— sp., ftnote 160, 161. 
Salisbury, E. J., Influence of Earthworms 
on Soil Reaction, ete., 415-425, 
Salix, Linn., mentd., 243; fossil pollen 
453-498, 504. 
— Arbuscula, Linn., remains in peat, 484, 
— herbacea, Linn., remains in peat, 484, 
— reticulata, Zinn., remains in peat, 484, 
— sp., mentd., 133, 
Senbiosa Succisa, Zinn., mentd., 459, 
Scenedesmus bijugatus, Kitz., 61, 
— — var. arcuatus, G. S. West, 3, 
— — var. alternans, Borge, 61. 
— obliquus, Kütz., 61. 
— quadricauda, Bréb., 3. 
Schizæa, Sm., 233. 
— dichotoma, Sm., mentd., 227, 
— elegans, Sw., mentd., 234, 
Schizæaceæ, discussed, 233-284, 
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