Die Embryonalentwicklung der Paradiesschnecke ... - TOBIAS-lib

Kapitel 2
Fig. 8: M. cornuarietis, A: control animal, 3-day old, dorsal view, arrow indicates direction
of growth of the mantle edge, dashed line 1 symbolizes the longitudinal body axis of head
and foot, dashed line 2 symbolizes the longitudinal axis of the visceral sac, and the angle
between these two lines indicates the rotation angle; B: animal from the platinum group, 4-
day old, dorsal view; C: control animal, 5-day old, dorsal view; D: animal from the platinum
group, 6-day old, dorsal view; E: shell-less snail, Pt-exposed, about 3 weeks after hatching,
right lateral view; and F: animal from the platinum group, 7-day old, body cavity opened,
dorsal view. an, anus; cn, ctenidium; h, head; i, intestine; mtc, mantle cavity; mte, mantle
edge; sh, shell; tn, tentacle; vs, visceral sac. [Color figure can be viewed in the online issue,
which is available at wileyonlinelibrary.com.]
tioned on the ventral side of the visceral sac. Secretions, forming an internal
shell, can be detected in a quite deep cavity that is lined with the tissue that
normally forms the mantle. This can also be seen in Figure 9B, which shows
a 9-day-old embryo from the platinum group lying on its back. An investi-
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