276
MAKO1’0 OMOHT
natatory (Pigs 13 and 14). The liirvae swim with the head upward and
forward.
In the zoea (ttcant~hosorntt in Scrgestidae) the third rnaxilliped and
some or ttll pweiopoda braonic fiiiictionrtl for swimming ; pleopods
ttro absent, or rudimentary (Fig. lfi). The larvae usually swim tail
first, ventral side up.
.
-- .
, ’
f
irti umtc~zoc:a. Act
The protoxoeal stages can Rwim with either the antennae or the
exopoda of the rnaxilliped, and as far u.8 t,he functional difference in
swimming is concertled, they are definitely intermediate between
nauylittr and meal stages. Williamson (lOfiCJ), however, considers that
they ttre morphologivttlly equivalent to the first thrm zoeel stages in
tho remainder of the Decapod8 and he proposes to include the protozoetil stttgw in the zoeiil stages.
MAKO1’0 OMOHT
natatory (Pigs 13 and 14). The liirvae swim with the head upward and
forward.
In the zoea (ttcant~hosorntt in Scrgestidae) the third rnaxilliped and
some or ttll pweiopoda braonic fiiiictionrtl for swimming ; pleopods
ttro absent, or rudimentary (Fig. lfi). The larvae usually swim tail
first, ventral side up.
.
-- .
, ’
f
irti umtc~zoc:a. Act
The protoxoeal stages can Rwim with either the antennae or the
exopoda of the rnaxilliped, and as far u.8 t,he functional difference in
swimming is concertled, they are definitely intermediate between
nauylittr and meal stages. Williamson (lOfiCJ), however, considers that
they ttre morphologivttlly equivalent to the first thrm zoeel stages in
tho remainder of the Decapod8 and he proposes to include the protozoetil stttgw in the zoeiil stages.