21 
Index to Vols. XXI-XXX. 
Massee, G. : The Structure and Affinities 
of British Tuberaceae (*), 23 , 243. 
Matonia, sporangium (*), 29 , 516 ; sporo- 
phyll (*), 29 , 510. 
Matricaria eximia, seedling-structure, 28 , 
316. 
Matteuccia intermedia, description (*), 28 , 
367, phylogeny (*), 28 , 415. 
Matthews, J. R. : Note on Abnormal 
Flowers in Orchis purpurea, Huds. (*), 
29 , 155. 
Matthiola tricuspidata, seedling-anatomy (*), 
28,715. 
McAllister, F. : Nuclear Division in 
Tetraspora lubrica (*), 27 , 681. 
McNicol, M. : On Cavity Parenchyma and 
Thyloses in Ferns (*), 22 , 401. 
— The Bulbils and Pro-embryo of Lampro- 
thamnus alopecuroides, A. Braun. (*), 
21, 61. 
Medicago, spp., seedling-anatomy, 28 , 726. 
Medullary phloem in stems of Dicotyledons, 
origin and meaning of (*), 29 , 567. 
— rays of Fagaceae, 26 , 1124. 
— — and annual ring of Quercus, evolution 
(*), 25 , 983. 
Medullation in Ophioglossaceae (*), 25 , 537 ; 
in the Pteridophyta (*), 25 , 555 ; 25 , 
1 206. 
Medullosa : on M. centrofilis, a new species 
from the Lower Coal Measures (*), 28 , j 
251. 
— centrofilis, affinities, 28 , 261 ; diagnosis, 
28 , 263 ; general structure (*), 28 , 252 ; 
leaf-base (*), 28 , 259 ; leaf-trace (*), 28 , 
258; periderm (*), 28 , 259; steles (*), 
28 , 254. 
Megaceros, a new genus of Anthocerotaceae 
(*), 21, 469 ; description (*), 21, 484. 
— antheridia (*), 21, 474 ; archegonia (*), 21, 
476 ; chromophores (*), 21, 471 ; embryo 
(*), 21, 477 ; germination, 21, 482 ; sexual 
organs (*), 21,474 I thallus structure (*), 
21 , 473 - 
— relation to other Anthocerotaceae, 21 , 
482. 
— Salakensis, n.sp ., description (*), 21, 484. 
— Tjibodensis, n. sp., description (*),21,484. 
Megalospermum, n. gen., description, 28 , 91, 
101. 
— Wildi, n. sp., description (*), 28 , 10 1. 
Meiotic divisions in the microspore mother- 
cells of Smilacina racemosa (*), 29 , 471. 
in Vicia Faba, behaviour of chromatin 
in (*), 28 , 633. 
Mentha rotundifolia, insect visitors, 22, 
606. 
Menyanthes trifoliata, insect visitors, 22, 610. 
Mercurialineae of South Africa, 27 , 371. 
Mercurialis, description of genus and species, 
27 , 397- 
— procumbens, history of, 27 , 371. 
Mesarch structure in cotyledons of Scita- 
mineae (*), 24 , 485 ; in stamens of Par- 
nassia (*), 27 , 492. 
Mesembryanthemum, spp., seedling-structure 
(*), 26 , 187. 
— - pseudotruncatellum, lens-cells of epider- 
mis (*), 25 , 1137. 
Mesostrobus, a new genus of lycopodiaceous 
cones from the Lower Coal Measures (*), 
23 , 379. 
— Scottii, n. sp., description (*), 23 , 379. 
Mesoxylon, n. gen., description, 24 , 237 ; 
diagnosis, 25 , 384. 
— Lomaxii, n. sp., description, 24 , 238 ; (*), 
26 , 1012, 1016. 
structure: comparisons, 26 , 1023; 
cortex (*), 26 , 1016 ; leaf-trace (*), 26 , 
1013 ; phloem and pericycle (*), 26 , 
1016; pith (*), 26 , 1013; wood (*), 26 , 
1015. 
— multirame, n. sp., description, 24 , 238. 
— platypodium, n . sp., description, 24 , 239. 
— poroxyloides, n. sp., description, 24 , 237 ; 
(*), 26 , 1017, 1023. 
comparisons, 26 , 1023; cortex (*), 
26 , 1021; leaf-trace (*), 26 , 1019; 
phloem and pericycle (*), 26 , 1021 ; pith 
(*), 26 , 1018; wood (*), 26 , 1020. 
— Sutcliffii, axillary buds (*), 25 , 406 ; cor- 
tex and leaf-bases (*), 25 , 404 ; description, 
24 , 237; diagnosis, 25 , 409; general 
characters (*), 25 , 385 ; leaf-traces (*), 
25 , 593, 398 ; pith (*), 25 , 391 ; vascular 
tissues (*), 25 , 398. 
Mesozoic conifers, anatomy (*), 27 , 533. 
Metabolism, function of hormones in regu- 
lating, 25 , 507. 
Metacedroxylon araucaroides, anatomy of 
wood (*), 27 , 538. 
— latiporosum, anatomy of wood (*), 27 , 
540. 
Metaxyla, phylogeny (*), 27 , 443. 
Metroxylon Rumphii, branching of, 23 , 338. 
— Sagus, branching of, 23 , 338. 
Metzgeria, vegetative reproduction (*), 24 , 
271. 
— spp., gemmae of (*), 24 , 273. 
— disciformis, n. sp., description (*), 24 , 
291. 
— oligotricha, n.sp., description (*), 24 , 280. 
— uncigera, n. sp., description (*), 24 , 276. 
— vivipara, n. sp., description (*), 24 , 287. 
Mexican species of Peperomia, 21 , 147. 
Michell, M. R. : On the Comparative 
Anatomy of the Genera Ceraria and Por- 
tulacaria (*), 26 , mi. 
Microchemical methods, 21 , 515 ; reactions 
for pectic substances, 25 , 747. 
Micrococca, the genus, 25 , 575 ; descrip- 
tions of species, 25 , 629 ; distribution, 
25 , 632 ; historical review, 25 , 580 ; key 
to species, 25 , 629; non-perulate Clao- 
xyla, 25 , 578 ; perulate Claoxyla, 25 
578 ; properties, 25 , 638. 
