Page:The crayfish - an introduction to the study of zoology (IA crayfishintroduc00huxl 2).pdf/17

 LIST OF WOODCUTS. PAGE

Frontispiece.

The Common Crayfish,

Astacus fluviatilis, (male)

Fig.

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2.

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Dorsal views of male and female

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Ventral views of male and female

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The gills.

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Dissection

Astacus fluviatilis.

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Side view of the male.

from the dorsal side

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Longitudinal vertical section

THE ALIMENTARY CANAL 7. yy

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of

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A GASTROLITH OR “CRAB’S EYE ’’

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Attachment

of

young

MERET OF MOTHER

to

swim-

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9.

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Structure of the stomach

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Longitudinal section of the sto¬ mach

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.

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11.

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Eoof of the stomach, from within

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12.

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Dissection from the side (male).

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13.

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Alimentary canal from above

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Blood corpuscles

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The heart

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Structure of the gills

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The green gland

-Transverse section of thorax

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