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93
articulis 3 primis brevissimis. Petles thoracici parium
trium ultimorum natatorii, omnes inter se consimiles,
qvin-qvearticulati (articulo terminali ungviformi priorum parium
destituti), articulis duobus ultimis dilatatis, foliaceis, setis
marginalibus longis subtiliter plumosis ornatis. Operculum
abdominale magnum (segmentum abdominale infra fere
omnino obtegens), subovale, in femina simplex, in mare
vero ex segmentis constans tribus distinctis, uno mediano
angustissimo et duobus lateralibus intus organo singulari
mobili et curvato postice seta longissima terminato
instruc-tis. Styli caudales simplices, angusti, biarticulati. Pedum
abdominalium seu branchialium secundum par ramis
am-bobus setis destitutis. Motus natatorius saltatorius,
retro-gradus, modice velox.
Munnopsis typica Sars, unica species.
Divisio anterior corporis depressa, posterior
subcylin-drica; latitudine corporis maxima dimidiam longitudinem
non asseqvente. Caput parvuro, fere æqve longum ac
la-tum, segmenta thoracica 2 anteriora longitudine æqvans
iisqve multo augustins, antice truncatum nullumqve rostrum
formans, prope marginem dorsalem posteriorem tuberculis
2 minutis conicis ornatum. Segmenta thoracica 4 anteriora
subæqvalia, brevia, fere qvintuplo latiora qvam longa;
posteriora 3 parum latiora qvam longa, antecedentibus pius
duplo angustiora, sextum septimumqve prope marginem
dorsalem anteriorem tuberculis 2 minutis conicis prædita.
Segmentum abdominale antecedentibus 3 junctis paulo
longius, non vero angustius, qvartam longitudinis corporis
partern aliqvantum superans, elongato-subovale,
latitudine vix dimidiam longitudinis partern æqvante, crista
dor-sali mediana rotundata, haud multo elevata, et ante eam
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