115 



livormed Æggenes Skal er forsynet, har rimeligvis 

 sin Betydning for Æggenes Spredning. Xaar Dam- 

 mene torrer iid, vil nemlig Æggcne derved sammen 

 med det opsmuldrede Mudder let kunne hvirvles oj) 

 af Vinden og føres afsted i storre Afstande. En 

 saadan Spredning af Æggene ved Vindens Hjælp 

 liar jeg ogsaa troet at kunne constatere paa Mærdo 

 Foruden i Storekjær», som synes at være det Sted, 

 hvortil denne Form oprindelig har været indskræn- 

 ket, paatraf jeg den paa tiere andre Punkter af 

 Øen, tildels i en meget betydelig Afstand fra det 

 nævnte Tjern, og undertiden i saa smaa og grunde 

 Regnpytter, at det var umuligt andet end antage, 

 at Æg rent tilfældigvis med Vinden er overfort 

 hertil fra «Storekjær». Det syne.s imidlertid som 

 om der skal ganske særegne Betingelser til, for at 

 denne Phyllopode skal kunne trives. Thi der var 

 adskillige Smaadamme paa Øen, tildels lige i Nær- 

 heden af «Storekjær», hvor intetsomhelst Spor af 

 den kunde opdages, skjondt disse Damme for andre 

 Entomostraceers Trivsel syntes at være meget gun- 

 stige. Dette synes ogsaa for en Del at kunne for- 

 klare denne 1'hyllopodes mærkværdig sporadiske 

 Forekomst. 



Udbredning. — Arten blev for.st opdaget af 

 Herman i grunde (-rrofter ved Strassburg, hvor den 

 ogsaa senere er fundet af v. Siebold. Brogniart 

 fandt den i Smaatjern ved Fontaineblau, og (jrulje 

 anfører den ogsaa fra Omegnen af Breslau og Berlin. 

 Ligeledes er den af Dr. Spangenberg fundet ved 

 Neustadt i Mecklenlnirg. I Sverige blev den Som- 

 meren 1871 fundet af Prof. Lilljeborg ved Ronneb}' 

 i Blekinge og, ifølge samme For.sker, opbevares i 

 Stockholms Museum Exemplarer fra Stockholms Om- 

 egn og fra Hallands Vadero. Endelig har Dr. Hans- 

 son tåget den i Bohiislan. Dens Udbredning stræk- 

 ker sig altsaa til følgende europæiske Lande : Norge, 

 Sverige, Tyskland og Frankrig. Andetsteds er den, 

 saavidt mig bekjendt, ikke paatruftet, medmindre, 

 som jeg er tilboielig til at tro, den amei'ikanske 

 Form, Limnaåia americana Morse, skulde vise sig at 

 være identisk med vor Art. 



shell of the egg is provided have jirobably their signi- 

 ficance in the distribution of the eggs. When tlie 

 ponds dry up, the eggs, together with the pulverised 

 mud, may be easily caught up by the wind, and 

 carried awa}- to some distance. Such a distribution 

 of the eggs by the helj) of the wind, 1 think, too, 

 may be demonstrated at Mæixlo. Besides in 'Store- 

 kjær». which seems to be the place to which tliis 

 form has originally been confined, 1 met with it at 

 several other jjoints 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 

 carried thither from «Storekjær», liv 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 neighliouiliood of «Storekjær» wlieie 

 no trace of it whatever could l)e 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 Phjdlojjod. 



Distribution. — This species was first discovered 

 b}' 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 Sue- 

 den, it was found in the summer of 1871, by Prof. 

 Lilljeborg, at Ronnebj' in Blekinge, and, according 

 to the same naturali.st, there are in the Stockholm 

 Museum specimens from the neighbourhood of Stock- 

 holm and from Hallands Vadero. Finalh-, Dr. 

 Hansson has taken it in Bohusliiu. 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. 

 Linwadia americana, Morse, should jirove to be iden- 

 tical with our species. 



