BONDER OF LIFE 



area represent* fce- M home. The salmon is essentially 



a freshwater n*t iJtoagh its nutritive periods are mostly 



spent in the >"?- H, spawning in the rivers is indicative 



of its origin^ >w The common eel, on the other hand, 



which has fc&tive period in the fresh waters, goes 



down to > $?& to *ipawn, and is probably to be 



regarded -<vralJy a marine fish with its old home 



ii-fcchs. A similar argument leads to the 



; tst- Lamprey is primarily a freshwater fish 



ujNiftiy tak*M to spending a nutritive period 



W> have air* fc--*v spoken of the forms of 



* fcfcfce v ' :- -i-AWf; In the case of the 

 B gnblem feuaiiBm nos^moDa^) 8/aiqm 

 bns Joqa balosba moil eanote ISBIB! aril ^nr/omai 



.sonaialmuDiio artl bnuoie mal 



remain 

 .-} nominally 



-ri r- ,!>) , ...st fclso be noted 



-liAt. * nrbr of sp^es of lamprey, such as the Brook 

 Lamprey, rwvr leave the fresh water, and this may be 

 taken as a-K'tht/r argument in support of the view that 

 the Sea Liimfsrey is secondarily marine. Let us follow 

 them now on their return journey to their cradle-area. 

 The spawning of the Sea Lamprey has been well described 

 by Dr. L. Hussakof . A circular depression is made, two to 

 three feet in diameter, in t \\* river-bed. Large numbers of 

 pebbles and stones a^ at of the chosen area until 



A *feaUow basin is in. y with a fr 



HM-. . avel. ' ; 



:-:;;i n ' : >VOrk ' 



