— 46 — 



noch der abseliliessendcn Bcarbeitung' liarrt. A. .T. Silfvonins 

 setzt seino sclion vor mclircivii Jnlirrn bcponiK'niMi iiud ziiiu 

 Tcil scdioii i)ublizi('rl('n riitcrsncliuiiii.'ii \\hrv die Larvcii- 

 ('ntwickbni<^- dov Ti-ieboplcivii Finlauds fort. Frl. K. .Miin- 

 sioi'lijolm wird dcniiiiiiclisl cinc Arbcil uhrv ( )liL;()c]i:i('lcii 

 verôffontliclicn. Die Icblbyclogic, dcrcii cifrigstcr Fordci-cr 

 Dr. O. Nord(|nist wai', sta^nit-rt vôllii;- stùl sciner Aiiswandc- 

 ruiiu'. Das von Nordquist «Jésamnudb^ i>:ross(' Matrrial iibri- 

 Wandei'un^vn dcr Salmoiiidcn uiid Aalc iind iibcr die geo- 

 ôfai)liisch(' ^^'rbroiliing dcr Fisclic in dcn Binnenge\v;iss(M'n 

 Finlands isl, so vicl icb wriss, niu^ crsl Icihvciso boarbcitcl nnd 

 pnblizicrl wordcn. In cinri' von scincn b'tzbMi Pnblikationcn : 

 SoiJH' Biolo(j/C(fl Re(fS()//s for llic iirrscnf Dtslrihvlion of 

 Freshirnto'-Fish iii Fijfltn/d (\), koiiinit ?\orili)uisl Ix'/iiglicb 

 des allgenicincn (diaraklci's dci' Fisclifanna in dcn Binnenseen 

 Finlands zu folgvndcn allgcnicinen SchUisscn : ■• As most of onr 

 Jakos aro nnnnants of ono or somo biggei' lak(>s, so Ibeir fisli- 

 fanna is also goncrally a rcmnant of tbe fisli-fanna in tlioso big 

 lakes. In most cases, tlu'iv bas, no donbl, (akcn place a mixing 

 np with fisbes wliicb bave ascendcd froin otbiM' lakes, but tins 

 eould, by far, not bappen ahvays. Aud also, if siudi a mixing 

 u}) bad occui'i-ed, tlio nalural conditions of Ibe lake uiusl bave 

 cansod, connnnnication Iiaving become inieriMipled, ail Hsbdviiids 

 Ibal were noi adapled ïov il gradnally lo die ont. •■ 



1)1'. Max Sanilergiebl in seiiiei' kiirzlieb ersebieneiieii Arbeil : 

 /)/(' (/('<)ffj-{/j)/i/scJ/c ]'('rhj'('///fj/(/ nui Mi/s'is rd/rld , Viilhi- 

 s'n'lUi (ji(fnh-isi)in()S(i, I'(ii//()ji()/-('in (///i//is in Dcnlsclihiinl 

 (ils Ei'h'UrrniKjsn'rsnch /hrcr llcrlimi fl (2), folgende allgv- 

 meinen Oc^sicbispunkte ziir lîeiu'li'ibiiig dei- Seenfauiia Finlands: 

 •• Nur fiir diejenigen Seen, welcbe seit Beginn dw Ahscbmelz- 

 pei'iode Siisswasserbinnenseen siml und seil ih^v Aneybiszeit znni 

 Ancvlnss(>e abwassei'n nnd zweilens fiir diejenigen Seen, \\('l(die 

 Reliklenseen ^r^ Anevbissees bilden, sind wii' gezwungen. eine 

 gemeinsanie ilei'kunl'l ans deni Ancylnssee anznn(>bni(Mi. 



- Fin- diejenigen Seen aber, A\-elelie Bcliklen Ai'^- Voldia- 

 nieeres sind. isl die MoLjiiebkeil einer isolierlen Anpassinig 



(1) Fcin\ia.t(). N, I'J0;1, p. "iS. 



(-2) Anhanii z. d. Abli. d. plins.-iiinth. Cl. dfr l\. /'/r».s.s. ALud. d. JIV.s.s., 

 1905, p. 18-!23. 



