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9juv.
9juv*.
C.9JUV.
9mp.
9 P ip.
9puii*.
c.9puii,
Young female, with not yet fully
developed incubatory plates; dorsal
view.
Same, ventral view.
Same, anterior part of body, dorsal
267
view.
Maxilliped of adult female.
Leg of same.
Pleopod.
Terminal piece of tail,
lateral views.
ventral and
Very young female, immediately
after
view.
the transformation; dorsal
Same, ventral view.
Same, cephalon and adjacent parts,
from below.
PI. 89.
1. Athelg'es tenuieaudis, G. 0. Sars.
X. A specimen of Spiropaqurus cliiroacanthus
infested with this parasite ;
dorsal view.
9ad. Adult female, ventral view.
9>ad*. Same, viewed from right side.
9,juv. Young female, with attached larval
male ; dorsal view.
9juv*. Same, ventral view.
Urs. Extremity of tail of adult female ;
dorsal view.
Urs.juv. Same part of a young specimen.
Pip. Pleopod.
cf ad. Adult male, dorsal view,
cfjuv. Young male in last larval stage ;
dorsal view.
PL 90.
2. Athelges bilobus, G. 0. Sars.
9juv. Immature female, with attached
male ; dorsal and ventral views,
cf. Male, ventral view.
PI. 90.
Phryxus abdominalis (Kroyer).
X. A specimen of Spirontocaris sccuri-
9.
9*.
9 2
9 2 *.
t.
mp.
P 1 -
frons infested with this parasite,
viewed from left side (legs of the
host omitted).
Adult, dextrorsal female; ventral
view.
Same, with attached male; dorsal
view.
Right part of body of another,
sinistrorsal specimen; dorsal view.
Same part from below, showing the
5 densely crowded incubatory plate
on right side, as also the oral area,
and the inner lamellae of the pleopoda.
Terminal piece of tail.
Maxillipeds.
Leg of 1st pair with pertaining
incubatory plate.
of 4th pair.
p 4 . Leg
p 5- 7 . Small rudiments of the 3 posterior
legs found on right side within the
angle between trunk and tail (see
fig- 9 2 cf.
*-)
Adult male, dorsal view.
Ccf . Cephalon of same, ventral view.
pcf Leg of same.
PI. 91.
Phryxus abdominalis (contin.)
9JUV 1 . Young, dextrorsal female, with the
incubatory plates not fully developed,
and having still the full number
of legs on both sides; ventral
9juv 2 . Immature
C9juv 2 .
9.juv 3 . Very
and dorsal views.
female, with attached
larval male, and exhibiting incipient
dextrorsal torsion ; ventral, dorsal
and lateral views.
Same, front part of cephalon from
below.
young, vermiform female,
with attached larval male; lateral,
dorsal and ventral views,
cflarv. Young male in last larval stage;
dorsal view.
Ccflarv. Same, cephalon and 1st pedigerous
segment from below (left antennal
flagellum and right 1st leg omitted).
Urs. cflarv. Same, extremity of tail, dorsal
view.
Embr. Embryo in last stage, dorsal, ventral
and lateral views.
PI. 92.
Mieroniseus-stages.
i. A specimen of Pseudocalanus elongatus
infested with 2 Micronisci of
different development; dorsal view.
Youngest
view.
stage observed, dorsal
Same, ventral view.
la. urp. Same, uropod.
Ib. Subsequent stage, exhibiting the
la.
la*.
first trace of the 7th pair of legs;
ventral view.
Ic. More advanced stage, dorsal and
ventral views.
Ic. p 6 . i'ame, leg of 6th pair.
Ic. p 1 . Same, leg of 7th pair, in process
of formation.
Id. Lust Microniscus-slage, dorsal and
ventral views.
Id. p. S;mie, leg of 7th pair.
Id. urp. Same, uropod.
2. A specimen of MetrltUn Intifja infested
by another form of Micro-
nisctis; viewed from right side.
2a. The Microniscus isolated, and
viewed from above.
2b. Another specimen just about to
cast off its skin: dorsal view.