- Subordo II. 
PHYLLOPODA. 
Character. Branchiopoder af meget forskjellig 
Kropsform, dels uden, dels med Rygskjold, det sidste 
undertiden udviklet i Form af 2 volumingse, det 
hele Dyr omsluttende Valvler. Legemets Segmenta- 
tion forskjellig hos de forskjellige Former. Ginene dels 
stilkede, dels sessile, undertiden neesten sammensmel- 
tede; et mediant Enkeltgie (ocellus) tilstede. Folerne 
i Regelen meget ulige udviklede; 1ste Par som oftest 
meget smaa og udelukkende sensitive; 2det Par 
af forskjellig Bygning, snart rudimentere (hos det 
voxne Dyr), snart udviklede til kraftige 2grenede 
Aarer, eller til tangformige Griberedskaber (hos 
Hannen). Overleben vel udviklet, klapformig; Under- 
leben i Regelen manglende. Kindbakkerne hos det 
udviklede Dyr uden Palpe. To Par Kjever tilstede, 
begge smaa og af forholdsvis simpel Bygning. Alle 
bag Munddelene folgende Lemmer respiratoriske, af 
tilnermelsesvis uniform Bygning og bladdannet lap- 
pet Form; deres Tal meget forskjelligt, undertiden 
abnormt stort. Udviklingen i Regelen en compli- 
ceret Metamorphose, begyndende med et frit Nauplius- 
Stadium. Indlandsdyr. 
Bemerkningér. Denne Underorden omfatter et 
ikke meget stort Antal Dyreformer, der imidlertid 
viser meget veesentlige Forskjelligheder, saavel hvad 
det ydre Udseende som den indre Bygning angaar. 
Hvad der hovedsageligt characteriserer denne Af- 
deling af Branchiopoder, og har givet dem sit Navn, 
er Structuren af de bag Munddelene folgende Lem- 
mer, der alle viser et lignende bladformigt og lappet 
Udseende som de til Midtkroppen hos Phyllocariderne 
horende saakaldte Branchialfodder. Da de tillige i 
sin Function er udpreget respiratoriske, benevnes 
Sudordo II. 
PHYLLOPODA. 
Characters. Branchiopods of very various 
shape, partly without and partly with carapace, 
the lastnamed sometimes developed in the form of 
2 voluminous valves enveloping the entire animal. 
The. segmentation of .the body different in the 
various forms. Eyes partly pedunculated, partly 
sessile, sometimes nearly coalescent; a median single 
eye (ocellus) present. Antenne, as a rule, very 
unequally developed; Ist pair most frequently very 
small and exclusively sensitory; 2nd pair of vari- 
able structure, sometimes rudimentary (in the adult 
animal), sometimes developed to powerful, 2-branched 
oars, or to pincer-shaped prehensile apparatus (in 
the male). Anterior lip well developed, flap-formed; 
posterior lip, as a rule, wanting. Mandibles, in the 
developed animal devoid of palpi. Two pairs of max- 
ille present, both small and of relatively simple 
structure. All the appendages placed behind the 
oral parts respiratory, of approximately uniform 
structure and leaf-formed shape; their number -very 
variable, sometimes abnormally large. The de- 
velopment usually a complicated metamorphosis, 
commencing: with a free Nauplius-stage. Inland 
animals. 
Remarks. This sub-order includes a not very 
large number of animal forms, which exhibit, how- 
ever, very material divergencies, both in respect of 
the external appearante as well as in the internal 
structure. What chiefly characterizes this division of 
Branchiopods and has gevin to it its designation is, 
the structure of the appendages placed behind the 
oral parts, which all exhibit a similar leaf-shaped 
and lobed appearance as the so-called branchial-feet 
pertaining to the mesosome in the Phyllocarida. 
As they are, besides, in their function prominently 
