24 1 1 IK K K A<.K I.N ( ANAhA. 



UorlvV ^^tH^lltllills prupiT on I lie ('list, imd llic cuurtt niujiios 

 oil tlio I'lU'ilic, iind .stiHarlicd I'roiii \'i('lnii;i to lalitudt! HO'. 

 All this ii'Lrioii, consistiiiiiot' llii' iiioiiiitiiiii nm;,M's and of 

 the clcvatcil pliitciiil Ix'twci'ii tliciii, was once: occupied hy 

 a conlliiciit j^dacic]' I .IMIO miles l(»ii^' and 400 miles wide. 

 Tlie main <4atlieiin^'-'j:iiiiind. lio\ve\-ei', was letween the 

 .".'til and ri'.llh parallels. TlielH'e Llie iee Unwed noiill- 

 ward ."irtO miles, and soutliwanl al»o\il (iOO miles, diviM'^dng, 

 in tlie inlei\rnin<Mlistaiice, eastci'lv and westerlv." 



The Laurentiile ^laeiei' had I'nr iis centre nji disti-ihntion 

 tlie highlands called the Lani'entian nmnntains, one arm 

 of which lies lu'tw'een Ilmlson's I»ay ami thc^ u'roat 

 plains nf r.rilish America. Iliiheilo, must of (Uii- know- 

 ledj^e of ^dacici' mnsfnients has pertained to the south- 

 ward -mo vin;Lj; ]«»rtions of this ^ncat sheet, hut we now 

 know that the reiuolin' parts moved north and north-west. 

 J)r. I>tdl has shown that there was also a centre of 

 distrihution in the peninsula of Lahrador, from which 

 movements railiate(l east, wi'st, south and north, hut 

 without reachin^f the coast northwai'd. This, however, 

 mav not have heeii an independent centre of .snowy 

 accumulation, as one arm of the Laurentian ridge oxteiids 

 through Lahrador. 



Aitpended to this chapter is a list of the several i)apers 

 refernMl to ahove and in the follovvin,^' chapters, part of 

 which have ap])eared in the "Canadian Naturalist and 

 deologist," and its succe.s.sor, the "Canadian Kecord of 

 Science. 



Jvcferences to memoir.s hy otlier authors will he found 

 in their proi)er places in the suUsequent chapters. 



