XVull THE PALEONTOLOGY OF MINNESOTA. 
C. alveolata Goldf., p. 45, Drummond. 
Catenipora labyrinthica Goldf., pl. xvu, fig. 2, p. 45, Drummond et bords du 
C. escharoides Lam., pl. Xvu, fig. 3, p. 45, Lac Huron. 
C. michelini Casteln., pl. xvu, fig. 1, p. 45, [le Drummond. 
Syringopora verticillata Goldf., p. 45, Drummond Ile du Castor. 
Astrea mamillaris Fischer, pl. xxtv, fig. 3. p. 45, River de l’Ohio. 
Strombodes pentagonus Goldf., p. 45, Lac Huron. 
Calamopora fuvosa, idem, p. 46, Ile Manitouline. 
C. minutissina Casteln., pl. XIX, fig. 2, p. 46, Ne Drummond. 
. mMinuta, idem, p. 46, idem., bords du lac Hrie. 
. radians, idem, pl. Xvull, fig. 1, p. 46, Buffalo, N. Y. 
. cellulata, idem, p. 46, Lac Huron. 
basaltica Goldf., pl. xvm1, fig. 3, p. 46, bords du lac Erie. 
polymorpha, idem p. 46, Baie Verte. 
gothlandica Lam., p. 46, Buffalo, N. Y. 
. inflata de Koninck, p. 47, Baie Verte. 
goldfussii Casteln., p. 47, Lac Huron, Baie Verte. 
. fibrosa Goldf., pl. xrx, fig. 4, p. 47, Trenton, N. Y. 
. verneuili Casteln., pl. XXIII, fig. 2, p. 47, Quebec. 
BNE ace hexagonum Goldf., p. 47, Lac Huron. 
C. goliah, Casteln., pl. XxX, fig. 1, p. 47, Tle Drummond. 
. atlas, idem, pl. XX, fig. 2, p. 47, Ile Drummond. 
. goldfussi, pl. xx, fig. 2, p. 47, Buffalo, N. Y. 
. plicatum? Goldf., p. 48, lle Makinau (Huron). 
. ceratites, idem, p. 48, Ile Drummond. 
. ammonis Casteln., pl. XXI, fig. 1, p. 48, New York. 
. Vicinum, idem, pl. xx, fig. 6, p. 48, idem. 
conicum, idem, pl. X x1, fig. 4, p. 48, Bords de 1’Ohio. 
. plicatulum, idem, pl. Xx11, fig. 4, p. 48, Ile Drummond. 
dilatatum, idem, pl. x XI, fig. 3, p. 48, Lac Huron. 
. Striatulum, pl. xx, fig. 1, p. 48, Lac Huron and Erie. 
. michelini, idem, pl. Xx, fig. 3, p. 49, Ile Drummond. 
. arborescens, idem, pl. X x11, fig. 2, p. 49, Lac Huron. 
orbygnyi, idem, pl. Xxtl, fig. 7, p. 49, Batavia, N. Y. 
. rollinii, idem, pl. xxu, fig. 5, p. 49, Ile Druramond. 
. distinctum, idem, pl. x xu, fig. 8, p. 49, Ile Manitoulines. 
. agglomeratum, idem, pl. Xx1, fig. 5, p. 49, Idem. 
Lithodendron irregulare Phill., pl. xx, fig. 1, p. 49, Lac Huron. 
Axinura, Casteln., p. 49. 
A. canadensis, idem, pl. x xtv, fig. 4, p. 49, Lac Sainte-Claire. 
Gorgonia ripisteria, Gold/., pl. x x1v, fig. 3, p. 50, Schoharie, N. Y. 
G. anticorum Casteln., pl. xxtv, fig. 1, p. 50, Lac Huron. 
G. siluriana, idem, p. 50, idem. 
Eschara scapellum Murch., p. 50, Iles Manitoulines. 
GIGICICIClaie eele 
eeaeacecoooaoooeoaa 
Crinoidea. 
lac Supérieur. 
Crisonoma antiqua Casteln., n. sp., et. gen., pl. XXV, fig. 1, p. 50, Genesee, N.Y. 
Cariocrinites ornatus Say, pl. xxv, fig. 2, p. 51, Lockport. N. Y. 
Pentremites florealis, idem, pl. xxv, fig. 3, p. 51, Kentucky and Alabama. 
Encrinites, pl. xxv, figs. 4-11, Lac Huron and Lac des Senecas. 
Apiocrinites rosaceus Schl., pl. xxv, fig. 12, p. 51, Lac des Senecas. 
Encrinites, pl. xxv1, figs. 1-4, p. 51, New York and Lac Huron. 
Corps inconnus, pl. XXVII, fees he 7, Trenton and Lac Huron. 
T. A. Conrad. 
1843. Observations on the lead-bearing limestone of Wisconsin, and 
genus of trilobites and fifteen new Silwrian fossils, by T. A. CONRAD. 
Sci., Philadelphia, 1843, Vol 1, 1841-43. 
The new genus is Thaleops, and the specific name given is ovata. 
descriptions of a new 
Proc. Acad. Nat. 
It was from Mineral 
Point. Mr. Conrad unhesitatingly assigns the lead-bearing beds to the Trenton, viz: 
