Theca.

149

Hbiebopoba.

Subdivision.

Genus, Species, andAuthor.

Lower Stage.

Middle Stage.

Upper Stage.

Fauna D. d. 1, 4L. H. G\, W.,U.L.

P., Potsdam .

Orthoc. Lst.

Orthoc. L., Pleta

P.

elegans,

Barr.

Bohemia .

(Ireland ) Derrymore Glen,Shropshire , Ludlow , Dud-ley, Lambrigg Fell (West-moreland), (N. & S.Wales)Dinas Bran, (Nova Scotia )Arisaig, New York .

gregaria, Meek & Hayden.

insularis, Eichw.

lata, „

lineolata, Salter.

Bighorn, Rocky Mountains ,NW. America .

Isle Odinsholm (Baltic).R6val, (Baltic) Isle Odins-holm.

Himalaya , Chorhoti Pass.

St. David’s (S. Wales ).

nobilis,

(Bohemia ) Hostin.

„ G. |. 2...P., Lingula FI....

P., L.Tremad....

Pleta, Brandsch.Shale aboveTr...P., Lingula FI....Potsdam Sa.

Llan., Carad. ...

obtusa, Salter.

operculata, „

Cleidotkeca.

paradoxa, Eichw.

parviuseula,Hall& Whitney,penultiraa, Salter,

primordialis, Hall.

reversa, Salter.

Maentwrog, St.David’sHead,Tafarn Helig (Wales ).

(N.Wales ) Borthwood, Porfc-madoc, &c.

D'Erras (Esthonia ).

S.W. Wisconsin , Iowa .

St. David’s (S. Wales ).

Iowa , (Wisconsin ) Black andChippewa Rivers, Trem-paleau.

(N.Wales ) Bala Lake, (S.W.Scot!) Girvan, (England)Ilorderley, New York .

(Bohem.) Hostin, Chotecz.

L.Llan., ArenigRocks, U.Tre-madoc.

P.

simplex,

)>

Shropshire , White-grit Mine,Shelve, (Bohemia ) Col.Krejci.

(South Wales) St. David’s.

Bohemia .

(Esthonia ) D’Erras.

Trough (Co. Clare ), Desert-create (Tyrone), (Spain )Ciudad Reale, (Denbigh-shire) Cerrig-y-Druidion,Leisley (Westmoreland).

Arenig Mountains (North Wales ), Kitton Castle(Shropshire ).

Vitre &c. (France ).

Fauna D, d. 1, 4

striatulus,

striatus,

triangularis,

vaginula,

vitrea,sp. ind.,

„ (many),

Barr.

Carad., H. R. G.

Portlock.

Tr.

Rouault.

Salter.

England, Wales , Ireland , &c.Hof (Bavaria ).

England, Wales , Scotland .

P.

9

”

Selwyn.

Salter.

Victoria (Australia ).

Arenig rocks ...

”

(S. Wales) Whitesand Bayand Ramsey Isle.

Summarj' (Geographical).

Genera.

Species.

Genera.

Species.

America .

Europe .

Victoria ,

S. Australia .

Tasmania .

India .

Common.

America .

Europe .

Victoria , i

S. Australia.

Tasmania .

India .

Common.

29

50

i

i

7

Brought forward .

75

91

2

1

10

16

3

2

21

12

3

10

24

o

2

5

6

4

1

3

1

6

8

i

1

8

3

5

34

1

i

2

75

91

2

1

10

100

147

3

1

i

15

Q

2