40 
Branchipodide. 
Fam. 1. 
Character. Legemet smalt cylindriskt, noget 
tykkere fortil, med Halen vel udviklet og tydeligt 
segmenteret hos begge Kjon, endende med 2 borste- 
besatte Halegrene. Hannens Gribeantenner tydeligt 
segmenterede og i Regelen forsynede med en rudi- 
mentere Bigren. Frontalvedheng tilstede hos Han- 
nen eller manglende. 11 Par Branchialfodder til- 
stede, alle med en enkelt sagtakket ydre Dekplade. 
Hunnens Hgbeholder tydeligt seekformig og bagud- 
rettet, udspringende fra de 2 forreste Halesegmenter. 
Bemerkninger. Til denne Familie horer ialt 
5 Slegter, nemlig: Artemia Leach, Branchinecta, 
Verrill, Branchipus Schiffer, Chirocephalus Prevost, 
og Streptocephalus Baird. Kun en af disse Slegter, 
Branchinecta, er representeret i vor Fauna. Fami- 
lien er hovedsageligt characteriseret ligeoverfor den 
felgende Familie, Polyartemiide, ved den forskjellige 
Bygning af Hannens Gribeantenner, ved det bety- 
delig ringere Antal Branchialfodder, ved Halens 
Form, endelig ved Beskaffenheden af Hunnens Egge 
beholder. Fra Familien Zamnocephalide, med hvem 
den kommer overens i Antallet af Branchialfodder, 
skiller den sig ved Legemets smekrere Form og 
navnlig ved Beskaffenheden af Halen. 
Gen. Branchinecta, Verrill, 1869. 
Syn: Branchipus, Milne-Edw. (ex parte). 
Slegtscharacter. Legemet af serdeles slank 
Form, med Halen tynd og forlenget, bestaaende af 
9 Segmenter, foruden Halegrenene; de sidste for- 
holdsvis korte. Hannens Gribeantenner simple, be- 
staaende af et tykt cylindriskt.Skaft og en smal, 
kloformig, indadkrummet Endedel; Bigrenen meget 
liden, knudeformig. Ingen Frontalvedheng tilstede. 
Branchialfodderne forholdsvis brede, med Exopoditen 
af afrundet oval Form, og den ydre Dekplade sag- 
takket i Kanterne. Hunnens Eggebeholder serdeles 
smal og forleenget, nesten cylindrisk. 
Bemerkninger. Denne af den amerikanske For- 
sker, Prof. Verrill, opstillede Slegt er vesentlig 
characteriseret ligeoverfor Sl. Branchipus Schiiffer 
ved den overordentlig slanke Kropsform, ved Man- 
Branchipodide. 
Fame: 
Character. Body narrow cylindrical, somewhat 
thicker in front, with the tail well developed and 
distinctly segmented in both sexes, terminating in 
2 bristle-beset caudal rami. Prehensile antenne of 
the male distinctly segmented, and usually furnished 
with a rudimentary sub-branch. Frontal appendages 
present in the male or awanting. 11 pairs of 
branchial feet present, all having a single serrated 
external covering plate. Marsupium of the female 
distinctly sac-formed, directed backwards, and i issuing 
from the 2 foremost caudal segments. 
Remarks. Five genera in all pertain to this 
family, namely: Artemia, Leach; Branchinecta, Verrill; 
Branchipus, Schaeffer; Chirocephalus, Prevost, and 
Streptocephalus, Baird. Only one of these genera, 
Branchinecta, is represented in our fauna. The 
family is principally characterised, in contrast with 
the following ‘family Polyartemiide, by the different 
structure of the prehensile antenne of the male, by 
the considerably smaller number of branchial feet, 
by the shape of the tail and, finally, by the cha- 
racter of the marsupium in the female. It distingu- 
ishes itself from the family Zamnocephalide, with 
which it agrees in the number of branchial feet, 
by the more slender form of the body, and se 
cially in the character of the tail. 
Gen. Branchinecta, Verrill, 1869. 
Syn: Branchipus, Milne-Edw. (ea parte). 
Generic characters. -Body of particularly slen-_ 
der shape, with the tail slender and prolonged, 
consisting of 9 segments besides the caudal rami; 
the last named relatively short. Prehensile an-_ 
tenn of the male simple, consisting of a thick, eyl-- 
indrical shaft, and a narrow, claw-shaped, incurved 
terminal part; the sub-branch very small, nodiform. 
No frontal appendage present. Branchial feet re- 
latively broad, with the exopodite of rounded oval 
form and the outer covering plate serrated on 
the edges. Marsupium of the female particularly 
narrow and elongated, almost cylindrical. 
Remarks. This genus, established by the Ame- 
rican naturalist, Prof. Verrill, is chiefly characteri- 
sed, in contrast with the gen. Branchipus, Schiffer, 
by the extraordinarily slender shape of the body, 
