hvormed Aiggenes Skal er forsynet, har rimeligvis 
sin Betydning for Aggenes Spredning. Naar Dam- 
mene torrer ud, vil nemlig Aiggene derved sammen 
med det opsmuldrede Mudder let kunne hvirvles op 
af Vinden og fores afsted i storre Afstande. En 
saadan Spredning af Aggene ved Vindens Hjelp 
har jeg ogsaa troet at kunne constatere paa Merdo. 
Foruden i «Storekjer», som synes at vere det Sted, 
hvortil denne Form oprindelig har veret indskren- 
ket, paatraf jeg den paa flere andre Punkter af 
Gen, tildels i en meget betydelig Afstand fra det 
nevnte Tjern, og undertiden i saa smaa og grunde 
Regnpytter, at det var umuligt andet end antage, 
at Mg rent tilfeeldigvis med Vinden er overfort 
hertil fra «Storekjer». Det synes imidlertid som 
om der skal ganske seregne Betingelser til, for at 
denne Phyllopode skal kunne trives. Thi der var 
adskillige Smaadamme paa Gen, tildels lige i Ner- 
heden af «Storekjer», hvor intetsomhelst Spor af 
den kunde opdages, skjondt disse Damme for andre 
Entomostraceers Trivsel syntes at vere meget gun- 
stige. Dette synes ogsaa for en Del at kunne for- 
klare denne Phyllopodes merkverdig sporadiske 
Forekomst. 
Udbredning. — Arten blev forst opdaget af 
Herman i grunde Grofter ved Strassburg, hvor den 
ogsaa senere er fundet af vy. Siebold. Brogniart 
fandt den i Smaatjern ved Fontaineblau, og Grube 
anforer den ogsaa fra Omegnen af Breslau og Berlin. 
Ligeledes er den af Dr. Spangenberg fundet ved 
Neustadt i Mecklenburg. I Sverige blev den Som- 
meren 1871 fundet af Prof. Lilljeborg ved Ronneby 
i Blekinge og, ifolge samme Forsker, opbevares i 
Stockholms Museum Exemplarer fra Stockholms Om- 
egn og fra Hallands Vaders. Endelig har Dr. Hans- 
son taget den i Bohuslin. Dens Udbredning strek- 
ker sig altsaa til folgende europeiske Lande: Norge, 
Sverige, Tyskland og Frankrig. Andetsteds er den, 
saavidt mig bekjendt, ikke paatruffet, medmindre, 
som jeg er tilboielig til at tro, den amerikanske 
Form, Limnadia americana Morse, skulde vise sig at 
vere identisk med vor Art. 
115 
shell of the egg is provided have probably their signi- 
ficance in the distribution of the eggs. When the 
ponds dry up, the eggs, together with the pulverised 
mud, may be easily caught up by the wind, and 
carried away to some distance. Such a distribution 
of the eggs by the help of the wind, I think, too, 
may be demonstrated at Merdo. Besides in «Store- 
kjer», which seems to be the place to which this 
form has originally been confined, I met with it at 
several other points of the island, sometimes at a 
very considerable distance from the above-named 
little lake, and sometimes in such small and shallow 
rain-pools, that it was impossible to assume other- 
wise than that eggs have been quite accidentally 
earried thither from «Storekjer», by the wind. It 
appears, however, that very special conditions are 
requisite if this Phyllopod is to thrive; for there 
were numerous small ponds on the island, some in 
the immediate neighbourhood of «Storekjer» where 
no trace of it whatever could be discovered, although 
these same ponds seemed to be very favorable to 
the well-being of other Entomostraca. This also 
seems partly to account for the remarkably sporadic 
occurrence of this Phyllopod. 
Distribution.— This species was first discovered 
by Herman in shallow ditches at Strassburg, where 
it has since been found again by v. Siebold. Brog- 
niart found it in small lakes at Fontainebleau, and 
Grube reports it also from the neighbourhood of 
Breslau and Berlin. It has also been found by Dr. 
Spangenberg at Neustadt, in Mecklenburg. In Swe- 
den, it was found in the summer of 1871, by Prof. 
Lilljeborg, at Ronneby in Blekinge, and, according 
to the same naturalist, there are in the Stockholm 
Museum specimens from the neighbourhood of Stock- 
holm and from Halland’s Vaderé. Finally, Dr. 
Hansson has, taken it in Bohuslin. Its distribution 
thus extends over the following European countries: 
Norway, Sweden, Germany and France. Elsewhere 
it has not, as far as I am aware, been met with, 
unless, as I am inclined to think, the American form,. 
Limnadia americana, Morse, should prove to be iden- 
tical with our species. 
