X
CONTENTS
N. Pitar (= Callocardia) morrhmna Gould
..
0 . Petricola pholadiformis hmarck
.. ..
P. Emis directus (Conrad) . . .. .. ..
Q. Mactra (= Spisula) solidissima D i l l w y n
. .
R. N y a arenaria Linn6
. . .. .. ..
S . Teredo navalis Linnd
. . .. .. ..
VI. Acknowledgments
.. .. .. .. ..
VII. References . . .. .. .. 1 . .. ..
The Breeding of the North Atlantic
Freshwater- Eels
The late ANTON F. BRUTJN
I. Introduction
.. .. .. .. .. ..
PAGE
.. 112
.. 115
.. 117
.. 120
.. 123
.. 127
. . 129
.. 130
.. 137
11. Anguillu anguilla L.-A. rostrata Le Sueur, the Taxonomic
Situation . . .. .. .. .. .. .. .. 139
I11 The Distance to Cover during the Migration . . .. .. 141
IV. How Does A . anguilla Reach the Breeding Place?
. . .. 142
Why Have No Migrating Eels Been Caught in the Strait of
Gibraltar?. . .. .. .. .. .. .. . . 145
VI. The Return of the European Eel to the Sea . . .. . . 147
VII. Schmidt’s CoIlections of Anguillu Leptocephali. . .. . . 164
Possible Temperature Effects on the Number of Vertebrae in
V.
VIII.
Anguilla . . .. .. .. .. .. . I
IX. Parallel Cases among North AtlaRtic Apodea . . ..
X. Other Specie8 of Apodert BrwJiny in the H~ganno Heti
XI. Reference8 . .
. .
. .
. .
. .
. .
.
I
Some Aspects of Photoreception and
Vision in Fishes
q J . A. (!. NICO~,
. . . . .. .. ..
I. Introduction
..
11. Extra-ocular Reception . .
.. .. .. ..
111. Kegalntion of Light Itenching SScnnory Surfaces
..
.. ..
A. I’ineul
. . .. .. ..
C. The Tapetum Lucidum of Chondrichthyes
. .
,. * .
B. Pupillary Movement
. . ..
I). Retinomotor Changea in Teleosts
. . ..
.. 156
.. 162
.
I
la4
.
I
ICH)
.. 171
.. 172
I .
174
.. 174
.. 176
.. 176
.. 178
CONTENTS
N. Pitar (= Callocardia) morrhmna Gould
..
0 . Petricola pholadiformis hmarck
.. ..
P. Emis directus (Conrad) . . .. .. ..
Q. Mactra (= Spisula) solidissima D i l l w y n
. .
R. N y a arenaria Linn6
. . .. .. ..
S . Teredo navalis Linnd
. . .. .. ..
VI. Acknowledgments
.. .. .. .. ..
VII. References . . .. .. .. 1 . .. ..
The Breeding of the North Atlantic
Freshwater- Eels
The late ANTON F. BRUTJN
I. Introduction
.. .. .. .. .. ..
PAGE
.. 112
.. 115
.. 117
.. 120
.. 123
.. 127
. . 129
.. 130
.. 137
11. Anguillu anguilla L.-A. rostrata Le Sueur, the Taxonomic
Situation . . .. .. .. .. .. .. .. 139
I11 The Distance to Cover during the Migration . . .. .. 141
IV. How Does A . anguilla Reach the Breeding Place?
. . .. 142
Why Have No Migrating Eels Been Caught in the Strait of
Gibraltar?. . .. .. .. .. .. .. . . 145
VI. The Return of the European Eel to the Sea . . .. . . 147
VII. Schmidt’s CoIlections of Anguillu Leptocephali. . .. . . 164
Possible Temperature Effects on the Number of Vertebrae in
V.
VIII.
Anguilla . . .. .. .. .. .. . I
IX. Parallel Cases among North AtlaRtic Apodea . . ..
X. Other Specie8 of Apodert BrwJiny in the H~ganno Heti
XI. Reference8 . .
. .
. .
. .
. .
. .
.
I
Some Aspects of Photoreception and
Vision in Fishes
q J . A. (!. NICO~,
. . . . .. .. ..
I. Introduction
..
11. Extra-ocular Reception . .
.. .. .. ..
111. Kegalntion of Light Itenching SScnnory Surfaces
..
.. ..
A. I’ineul
. . .. .. ..
C. The Tapetum Lucidum of Chondrichthyes
. .
,. * .
B. Pupillary Movement
. . ..
I). Retinomotor Changea in Teleosts
. . ..
.. 156
.. 162
.
I
la4
.
I
ICH)
.. 171
.. 172
I .
174
.. 174
.. 176
.. 176
.. 178