Annals of Botany. 
36 
Selaginella Wildenowii, leaf-structure (*), 
xi. 139; root-structure (*), xvi. 461. 
Sensitive region, localization of geotropic 
(*), xiii. 567. 
Sensory zone of roots (*), xvi. 429. 
Sepedonium niveum, n. sp., description (*), 
xvi. 80. 
Sequoia sempervirens, archegonia (*), xviii. 
14 ; embryo (*), xviii. 20 ; female game- 
tophyte (*), xviii. 9 ; fertilization (*), xviii. 
17 ; male gametophyte (*), xviii. 5. 
Seward, A. C. — A Contribution to our 
Knowledge of Lyginodendron (Plates V 
and VI) (+), xi. 65. 
— Anatomy of Lepidodendron aculeatum 
(Plate XXVI and three text-figures) (+), 
xx. 371. 
— A New Genus of Palaeozoic Plants (t), 
xiii. 612. 
— The Jurassic Flora of Britain (+), xiii. 610. 
— The Structure and Affinities of Matonia 
pectinata, xiii. 319. 
— and Gowan, J. — The Maidenhair Tree 
(Ginkgo biloba) (Plates VI I I-X), xiv. 109. 
Sex, change in, of Willows, xii. 557. 
Sexual cells in Dictyota dichotoma, periodi- 
city of (*), xix. 531. 
— organs of Pythium ultimum (*), xv. 278, 
281, 289. 
Sexuality of Ascomycetes, xiii. 581 ; Basidio- 
mycetes, xiii. 585; Cutleria, xii. 102; 
Melampsora Rostrupi (*), xx. 41 ; Phy- 
comycetes, xiii. 576 ; Puccinia Adoxae 
(*), xx. 43 ; Puccinia Malvacearum (*), 
xx. 42 ; Puccinia Poarum (*), xx. 40 ; 
Saccharomycetes, xv. 759 ; Uredineae, 
xiii. 585 ; (*), xx. 35 ; Uromyces Ficariae 
(*), xx. 43 ; Uromyces Poae (*), xx. 37 ; 
Uromyces Scillarum (*), xx. 43 ; Ustila- 
gineae, xiii. 584. 
— of the Fungi, xiii. 575. 
Shaw, W. R. — The Fertilization of Ono- 
clea (Plate XIX), xii. 261. 
Shoots and roots, correlation of growth in, 
xv. 615. 
Shove, R. F. — On the Structure of the 
Stem of Angiopteris evecta (Plates 
XXVIII and XXIX), xiv. 497. 
Sieve-plate of Pinus, development (*), xv. 
588, 594. 
Sieve-tubes of Angiosperms, histology, xvii. 
265. 
— of Pinus, albuminous cells (*), xv. 600 ; 
callus, origin (*), xv. 597 ; callus rods, 
formation (*), xv. 590 ; callus, value, xv. 
605 ; connecting-threads, function, xv. 
603; histology (*), xv. 575; sieve-plate, 
development (*), xv. 588, 594; slime- 
strings, function, xv. 603. 
— of Schizaeaceae (*), xv. 395. 
Sigillaria, stem-structure of a ribbed (t), 
xiii. 607. 
— elongata, stem-structure (t), xiii. 608. 
Sigillariopsis, occurrence of in Lower Coal 
Measures of Britain (t), xviii. 519. 
— sulcata, structure (t), xviii. 519. 
Siliceous deposits in Schizaeaceae, xv. 402. 
Size of leaves, influence of correlation upon 
(*)> xx. 79. 
Smut in Barley, method of obtaining, xi. 
333 ; xii. 5 66. 
Snow, J. W. — Pseudo-Pleurococcus, n. gen. 
(Plate XI), xiii. 189. 
Sodium bromide, effect of on carbon-as- 
similation in Ulva latissima, xv. 63. 
— chloride, effect of on carbon-assimilation 
in Ulva latissima, xv. 53. 
— nitrate, effect of on carbon-assimilation of 
marine Algae, xv. 672. 
— sulphate, effect of on carbon-assimilation 
in Ulva latissima, xv. 66. 
Solenostele, definition, xvi. 523. 
Solenosteles, typical (*), xvii. 691 ; with 
internal accessory vascular strands (*), 
xvii. 689. 
Solenostelic Ferns, anatomy (*), xv. 71 ; xvii. 
689 ; transitional types (*), xvii. 694. 
Sordaria anserina, description (*), xv. 334. 
— appendiculata, description (*), xv. 340. 
— hreviseta , description (*), xv. 340. 
— bombardioides, description, xvi. 73. 
— curvicolla, description, xv. 337. 
— decipiens, description, xv. 343. 
— jimiseda , description (*), xv. 340. 
var. appendiculata, description (*), xv. 
34 °- 
— fumicola, description, xv. 342. 
— globosa, n. sp., description (*), xv. 334. 
— hirta, description (*), xv. 336. 
— - macrospora, description (*), xv. 339. 
— minima, description (*), xv. 335. 
— minuta, description, xv. 342. 
— neglecta, description (*),. xv. 339 ; xvi. 73. 
— platyspora, description, xv. 342. 
— pleiospora, description (*), xv. 338. 
— setosa, description (*), xv. 336. 
— stercoraria, description, xv. 343. 
— * Winteri, description (*), xv. 340. 
South American species of Geophilous 
Peperomias (*), xx. 400. 
Sparmannia africana, movements of flowers, 
and their demonstration by means of the 
kinematograph (*), xvii. 761. 
Spathicarpa sagittaefolia, antipodal cells (*), 
xvii. 680; embryo (*), xvii. 681 ; embryo- 
sac (*), xvii. 678 ; endosperm (*), xvii. 
680. 
Spathularia, description, xi. 253. 
— clavata, description (*), xi. 254. 
— • crispata , description, xi. 295. 
— - flava, description (*), xi. 255. 
— flava , description (*), xi. 255. 
— flavida , description (*), xi. 255. 
— - — var. crispa , description (*), xi. 255. 
var. plicata, description (*), xi. 255. 
— Neesii, description, xi. 258. 
