164 
The American Geologist. 
March, 1803 
P.\I„K0Z0IC. 
Mesozoic. 
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Rhipidomella, (Ehlert. 
Platystrophia, King. 
Fam. RnrNCHONELi.TD.E. 
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^ 
-^ 
■"■■" 
■■" 
■■" 
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— 
— " 
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Rhynchotrema, Hall. 
Rhyuchotretn, Hall. 
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TTncinului», B.'iyle. 
^^ 
Hy])otliyris, Kin<;. 
Steiiochi.-'iina, Conrad. 
Leiorliyiu'hiis, Hall. 
Rliyiichoporiiia, (Ehlert. 
Terebratuloidea. Waaeen. 
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o 
•> 
•> 
Rhynchonella, Fi.-cher de Wald. 
1 
Austriella. Bittner. 
Acanthothyris, d"Orbigny. 
Norella, Bittner. 


Heniithyris, d"Orl)igny. 
PeregrineUa, (Ehlert. 
Rhynchonellina, Gemmellaro. 
Diiiierella. Zittel. 
Cryptopora, -leffreys. 
Eatonia, Hall. 
V Branconia, Cagel. 
Fam. EicHWAi.uuD.E. 
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^^ 
Eichwaldia, Billing.^. 

Fam. ATRTPm.K. 
=mmm 
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Subfam ZY(ii)SPiKiN,K. 
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Zygos|)ira, Hall. 
— ^ 
('lassia, Dayidson. 

Coelospira, Hall. 

— 
Anoplotheca, Sandberger. 
— 
Subfam. Atrypin-h. 
1— > 
a=» 
Atrypa, Ualman. 

— 
Griuiewaldtia, Tschernyschew. 
— 
': Karpin(*kya, Tsch. 
— 
Fam. Si'iniFERiD.E. 
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t5B= 
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^^ 
Snbfam. Si-essiin.e. 
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Cyrtnia. Davidson. 

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Delthyris, Dalman. 
— — 

Spiriferina, d-Orbignv. 
^"^ 
Suet^sia, Deslongchamps. 
Mentzelia, (^iienstedt. 
— 
Subfam. Uncitin^,. 
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I'ncites, Defraiice. 

Subfam. Tkigonotretin.e. 
— 
_ 
1^ 
Cyrtia, Dalman. 
Syringothyris, Wincliell. 

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Martinia, .Vlcl^oy. 
— 

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Martiniopsis, VVaagen. 

Amboc(vlia, Hall. 
— 
Reticularia, McCoy. 
^— 


Spirifer, So\yerby." 
■^~" 
~"~ 
^^ 
Fam. Nrci.EOisi'iiaD.E. 
— 
— 1 
« 
Dayia, Davidson. 
^~- 
Ilimk'Ua. Davidson. 
1 
■^~' 
