ANIMALS. 8] 
CLASSIFICATION or tHE vartous GROUPS constrtuTING THE Crass PALLIOBRANCHIATA. 
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SUB-CLASSES. | ORDERS. | FAMILIES. 
Lingulide . 
Obolidee 
Craniadee. ... 
Discinidee 
Calceolidee . 
Productidee - 
Strophomenidee 
on : 
Sarcicobrachia . 
Huricropopa 
Sclerobrachia . 
Spiriferidee’. . . . 
Strigocephalidee ~. 
Terebratulidee 
AncrLopopa . Aucylobracha . 
Rhynchoride. . 
Magasidee 
Thecideeidee 
Argiopidse 27". \. 
! The genera in italics are Permian. 
Davidsonide . . 
| GENERA. ! 
Lingula (unguis), Bruguiére. 
Obolus (Apollinis), Eichwald. 
-Crania (Egnabergensis), Retzius. 
| Siphonotreta (unguiculata), De Verneuil. 
Criopus (turbinatus), Poli. 
Discina (ostreoides), Lamarck. 
\ Orbiculoidea, A. d’Orbigny. 
Trematis (terminalis), Sharpe. 
Calceola (sandalina), Lamarck. 
Davidsonia(Verneuilia), BouchardChanteraux 
oe { Productus (Martini), J. Sowerby. 
/Strophalosia (excavata), King. 
_Strophomena (rugosa), Rafinesque. 
/Lepteena (rugosa), Dalman. 
-Chonetes (sarcinulata), Fischer. 
vOrthis (pecten), Dalman. 
Schizophoria (resupinata), King. 
| Streptorhynchus (pelargonatus), King. 
yOrthisina (plana), A. d’Orbigny. 
Diczlosia (biloba), King. 
Platystrophia (biforata), King. 
\Isorhynchus (aquirostris), King. 
Hypothyris (cuboides), Phillips. 
vCamarophoria (Schlotheimi), King. 
JUncites (Gryphus), Defrance. 
Pentamerus (Knightii), J. Sowerby. 
Atrypa (reticularis), Dalman. 
Athyris (concentrica), M‘Coy. 
Cleiothyris (pectinifera), Phillips. 
etzia (Adrieni), King. 
Welthyris (elevata), Dalman. 
Prigonotreta (Stokesii), Koenig. 
\Spirifer (cuspidatus), J. Sowerby. 
“Martinia (glabra), M‘Coy. 
Strigocephalus (Burtini), Defrance. 
\Mpithyris (elongata), Phillips. 
Terebratella (Chilensis), A. d’Orbigny. 
-Terebratula (vitrea), Lamarck. 
‘Pygope (diphya), Link. 
Eudesia (orbicularis), King. 
-Megerlia (truncata), King. 
~Waldheimia (Australis), King. 
[ets (pectunculus), King. 
t 
Delthyrideea, M‘Coy. 
Se (costata), Dalman. 
athe agas (pumilus), Sowerby. 
Bouchardia (rosea), Davidson. 
-Thecideea (Mediterranea), Defrance. 
Argiope(detruncata), Hudes-Deslongchamps.? 
2 IT demur to the order Cryptobrachia, proposed by Mr. J. E. Gray for Thecidea and Argiope, until more 
is known respecting the molluscs belonging to these genera. 
From Professor E. Forbes’s statements (which 
I had not seen when my previous remarks on Thecidzea were written), it would appear that Argiope is a 
L 
