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NW. CONTENTS. 
Initiation of the Work; Its Purpose; Acknowledgments................ 
Location and Physical Features of the Area Studied; Mode of Deter- 
mining and Mapping the Distribution of Plants, Physiog- 
EN IUCR Ua ek LS cain Fah anne VS os RAG aso dla Wid Bean dw © ahs 
1. Location, Construction of Map, Mode of Discovering and Recording 
thie: Postlionss of4 Planter: 4 4.6r oir. Cee ee ces ecees 
2. Topography of Harbor; Size, Depth, Character of Bottom and Shores. 
3. Tide-levels; Mode of Determining Height and Rate of Rise and Fall 
CE OS ee ee eM ee eee re hes Cee Re ae CL Ee RS ate mae tree eae 
Plant Associations; Characterization of the Belts or Zones of Vegeta- 
tioneana. Their. DIStripntion. 0. co. cee st he eee ec ey wee ease 
LON A: PUREST LUBE CLL rere cee le GME Snares MONS eae ere ete ere eo ee oe ee sc sée ea 
2. The Bottom Vegetation of the Harbor from —5 to +41.5 feet (the 
Sub Littoral and Lower Littoral Belts).................. 
A. Plants of Loose Soil (The “ Enhalid Formation ” of Warming).. 
B. Attached Alge of Harbor Bottom: ‘“ Lithophilous Benthos’”’.... 
COEpiphytic Atere on Sostora-and) Ulver. Pe. Clee. Oe cw icees 
"The Midtittoralshelt tron £6 to 0 Teer. Fe Sr eS SO oe ca ae 
Ai Tite MiG-Hiiioral Marsico ee ee ete oe eh ce wakee bases ene 
Per RiuGtSPArlLind Petal AOSOCIALIOM Sie ce kek wa ee d's a See eae kas 
oo bie Ale OL the MiIG-ttOral Marah ss oo... oe ues ww coe ow 
B. The Mid-littoral Rockweed Association, on Wharves........... 
Poet i OCE LaALLLOreti. Get, 1 TONG. LO. LOCK 6 oo. ac aa5 pices 6 accsoisile ) wave 2 ol 
A. Seed Plants of the Upper Littoral Belt (Associations of Spar- 
tina patens, Sueda, Salicornia, Juncus, or Scirpus)....... 
Pee ae OF Le CCE LLLOLAT TIGA, fat tins gs a cutaeus t svlekre age ath « vs se « 
ee ire tee COPaL Et CATO G00 he COOL oc ccte scan « 5 cas steuuheeo Le cuake widiain 
A. The Supra-littoral Beach or Storm Beach.................... 
1. Storm Beach of the Spit (from 8 to 12 feet)............... 
2. The Supra-littoral Beach, or Storm Beach, of East and West 
Sides of the Harbor (from 8 to 10 feet).................. 
B. Supra-littoral Belt of the Marsh, or Brackish Marsh (8 to 10 ft.). 
6. Description and Map of Belt Transect of the Marsh (1.5 to 10 ft.).... 
Factors Influencing the Distribution of Littoral Plants................ 
ss EE Pe eee ee aa a Ree etre ene as on eae eee ane, sean 
A. Living Substrata (Plante or Animals) oc... ce he ee we hes 
Peep OT Divi iret at cee ee ee ue deus ee tsees a tie ces fo Lite oo ens tie 
1. Soils as Substrata (Gravel, Sand, Mud, Humus, or Peat).... 
2. Solid Substrata (Stones, Pebbles, Shells, Piles, and Logs)... 
Zn (HNMEUCE OL TW ALEr-CUlTeCn tints ce ate ae ee ee eee each eee 
3. Character of Tidal Changes and their Influence on Plant Distribution. 
Uonracter and Mabnitugae OF, LNG. T1GCH oc 2c i. esc ce 2 esse cette. 
. Effect of Tidal Changes in Water-level on Evaporation or Trans- 
Piva ciOl LEO. CUS Piatti ys ay a cae <e Steced ote aharate Ole ie 
es suilect, Of “Lidal Changes on Aeration. 3.265 30. 5.. bosses eke ws cue 
. Effect of Tidal Changes on Salinity of Soil Water at Higher 
PE VELE Pee ce eae a we ee ere che are eo aid eee eee 
. Effect of Tidal Changes in Exposing Plants to Rain............ 
. Effect of Tidal Changes on the Light Supply Reaching Plants... 
4 “The sannicy oO. the Water of the Harborise . oe cow cscs veces 
bola ne “lentperatiure Of the Water oe ber lis vars es. cate thc poe ecco. v0 Sian 
rae yeast CI OLS ets eae Oi votes tee ce Cae habe cree ein mite 
List of Vascular Plants of Bottom and Shore, with Vertical Range, and 
Physical Characteristics of Habitat of Hach.............. 
List of Thallophytes Occurring Below the 10-foot Level................ 
SETAE ULO LI COLOriet ii ncn ein: ocr spruce « Te one Ge he Ore eee ie aes 
INDEX OF TABLES. 
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© TABLE A. Duration of daily submergence and exposure of soil at various tide- 
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Be eke RR RP bate Lg cg et bole ale gears ator dy Se a, he A eat oe 
Number of submergences per month and for growing season of 
HISREr MAG-lavelas cee eee ee i Oe ee SASL SS 
Number of exposures per month and for the growing season of 
fower! Cide-1evele \ 5s ete ee es Re ey ame al. Se eh Ame ee UN Gok 
Daily exposure of various tide-levels to daylight.................. 
Vertical distribution of commoner plants in the vegetational belts 
List of vascular plants, with analysis of the habitat of each........ 
List of thallophytes, with the habitat of each species.............. 
oD tee 2 p= ry x, = 
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