xii
VII.
VIII.
IX.
X.
XI.
XII.
XIII.
XIV.
xv.
XVI.
XVII.
OONTENTS
Breeding Sectson
.. .. ..
Fertilization
.. .. .. ..
Embryology and Larval Development . .
A. The Gametes
.. ..
B. Development
.. ..
C. Duration of the Larval Period
D. Food of the Larvae..
E. Settlement . . .. ..
The Season of Settlement
..
The Pattern of Vertical Settlement
..
Teredinids in Deep Water
..
Growth Rates
. . .. ..
Dispersal of Shipworms . . * .
Physiological Studies
. . ..
Food and Digestion
. . ..
Ecology . . .. .. * .
..
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0 .
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.. 396
.. 399
.. 401
.. 401
.. 402
.. 406
.. 407
... 407
. . 409
.. 417
,. 424
.. 426
.. 428
.. 431
.. 441
.. 446
A. The Influence of Temperature on the Activity
B. The Effects of Salinity . . .. .. . . 452
C. Occurrence in Fresh Water
.. .. .. 456
D. Illumination..
.. .. .. .. . . 457
E. Settlement in Relation to Light and Gravity . . 467
F. Role of Primary Film
. . .. .. . . 457
G. Marine Fungi and Shipworm Attack
. . . . 458
H. The Effects of Water Currents Upon the Rate of
Attack of Shipworms . . .. 9 . .. 469
and Distribution of Shipworms
.. . . 447