Palcearca.

140

Dimyakia.

Subdivision.

Genus, Species, andAuthor.

Lower Stage.

Middle Stage.

Sfciper Stones, L.

amygdalus,

Salter.

Shropshire , Cefn GwynlleMine, Norbury.

Carad.

anglica, D’Orbigny .

(Wales ) AUt-y-gader.

H. B. G..

? Anticostiensis,

killings.

(Anticosti ) English Head.

Tr.

auriculata,

Salter.

W est Tasmania .

avieuloides,

(Wales ) Montgomeryshire,Nant Torweth, Llangollen.

Llandov.

Billingsiana,

”

CH.

breviuscula,

killings.

(Canada W.) Ottawa City .

Carad.

bulla,

Salter.

(Wales ) Meifod, Nant Tor-weth, (Shropshire ) Hor-derley.

BL., Tr.

Canadensis,

Billings .

(Can.E.)Montreal , (Can.W.)Ottawa City, N.W. endof Lake Huron .

Tr.

compressa,

Salter.

West Tasmania ,

cordiformis,

Billings .

North-west end Lake Huron .

distorta,

Salter.

West Tasmania .

H. E. G.

Emma,

Billings .

(Anticosti ) English Head.

CH.

faba,

(Can. E.) Grenville, LowerOttawa Eiver.

L. H. G-.

flexuosa,

>J

(Canada E.) Cape Gasp6.

Tr.

gibbosula,

Salter.

West Tasmania .

Gunnii,

H. E. G.

Harrietta,

Hillings.

(Anticosti ) English Head.

Hindii,

Headi.

»

(Canada W.) Toronto .

CH., BL., Tr. ...

Huronensis,

**

(Can. E.) Montreal , Lake St.Louis, (Can. W.) Lough­ borough , North-west Lake Huron .

Tr.

inflata,

Salter.

West Tasmania .

H. E. G.

? insularis,

Billings .

Anticosti , West end.

L. H. G.

lata,

Modiolopsis.

(Canada E.) Cape GaspA

BL., Tr.

Leucothea,

>>

Salter.

(Can.W.) Mid.Ottawa .River .

Carad.

modiolaris,

(N. Wales ) Bala, Moel-y-Gamedd.

BL.

Niota,

Hall.

Wisconsin .

Tr.

obliquata,

Salter.

West Tasmania .

Carad.

obscura,

>'

(Wales ) Meifod, Bala,Yspatty Evan.

BL., Tr.

obtusa,

Ambonychia.

Hall.

Wisconsin , N.W. Tennessee ,N.W. Michigan , (N.York)Watertown, Anticosti , W.end.

L. H. G.

orbicularis,

Billings .

(Can. E.) Gasp6 Bay, Anti­ costi .

Tr.

pinguis,

Salter.

West Tasmania .

H. E. G.

plebeia,

Billings .

(Anticosti ) Charlton Point.

ponderosa,

»

Cape JSmyth, Lake Huron ,North-east end.

Carad.

quadrata,Matkeria ?

Salter.

(Wales ) Bettws-y-Coed.

BL.

rectirostris, Hall& Whitney.

Wisconsin .

Tr.

reversa,

Salter.

Wast Tasmania.

BL.

rotundata, Hall &Whitney.

Wisconsin.

)>

rugosa,

Billings .

(Can.E.)Montreal , (Can.W.)Middle Ottawa River .

”

Saffordi,

Edmondia.

>>

Tennessee (TJ. S. America).

Carad.

secunda,

Salter.

May (Normandy ), BudleighSalterton, Devonshire .

CH., H.E. G....

sigmoidea,

Billings .

CanadaEast, (Anticosti ) Ma-casty Bay &c.

Lowest Lian. ...

socialis,

Salter.

(Wales ) Ty-obry, Penrhyn.Tremadoc.

BL., Tr.

spinifera,

Billings .

(Can.W.) Mid.OttawaEiver

CH., Tr.

B., Tr.

subangulata,

Edmondia.

subcarinata,

subspatulata,

Modiolopsis.

Hall.

Billings

Hall

(N. York) Jefferson County,(Can.W.) La Cloche, Lake Huron , Mid.OttawaEiver.(Can. E.) Montreal , (Can.W.) Mid. Ottawa Eiver,Camp d’Ours,LakeIfuron.(N. York) Jefferson County.