PLKISKX'KXE FOSSILS. o-.O 



viirioty still lives at TiKloiissaf, iiiid is iippiufiitly I'liariu'toristio of 

 ■situations wiiuro i\w water is eolil and exposed t(. inteiinixtiiie of fresh 

 water. 'J'lie ordinaiy variety oeeiirs at IV.rtlaiid, and also in some of 

 the upper lieds at Rivierc-dn-r.oup. At Montreal only the small oval 

 variety ocuiirs. This variety is also found in the Clyde beds and in 

 tlie Crag. 



M(iilii)l(i inoiliiihis. \An\\. 



Fossil-Montreal, veiy rare. 



Recent— Lalirador to New Knj,'land ; very eommnn on the eoasts of 

 Xova Scotia and New Kngluud ; Xorth I'acltie ; found sjiaringly along 

 the N'aneouver and Californian coasts till it is rejjlaced in the <;ulf 

 fauna l>y M. rajnu;, C'onrad. 



This sjiecies becomes rare to the northward ; and this, as well as its 

 being proi)er to rocky shores rather than to clays and sands, may 

 account for its rarity in the Canadian I'leistoccne. it is, however, 

 common in the glacial beds of I'luropc. 



Jf<)i//(i/(ni(i niijr((. Cray. 



Fossil — .\[ontreal ; Rivicre-dn-Loup (small variety )hx(i ; also large 

 and line) • very large and well preserved in nodules at Kennebeck, 

 Maine ; Lal)iador (Packard, if his M. i/!.-<frep((n-< as I suppose) ; IMack 

 Point, N.i;. ? (Matthew). (See Plate V., Fig. o.) 



Recent— (iulf of St. [.awreiice (Whiteaves) ; Little Metis: Kivicre- 

 du-r,oup. Very large ami tine on coast of Xova Scotia (Willis) ami as 

 far north as (ireeiiland (JA. tlisrors, L.) ; British Colund)ia. 



Modiolarld rorrii<ial(i. Stimpson. 



Fossil— Rivicre-du- Loup. 



Recent— Murray P.ay, Little Metis and Cacouna ; precisely similar 

 to the shells from the Pleistocene. Also Crecnland (Miilk-r) ; Lalirador 

 (Packard) ; and south to Cape Cod. 



Modlolarid (liscors. 



Fossil— IJeauport, of good size ; Greenland (Mr.ller) ; Montreal (Mr. 

 Kennedy). 



Recent— Lal)rador to 'Saw F^ngland ; Little Metis ; Riviere-du- 

 Loup ; Rritish Columl)ia. Specimens from (iaspe are precisely similar 

 to the fossil. 'I'his shell is no doubt identical with M. /irrii/a/d. of 

 (iray, and ^jossibly with the M. iliscrepdn.'i of some other authors. 

 It is, however, the same Avitli that figured in Binney's (iould as 



