1871.] SENATE— No. 327. 31 



Ag. ; and of Cephalaspis, Ag., from the old red sandstone of 

 Scotland. 



(b) The Carboniferous system is represented by a large 

 number of Palcconiscus and Ambhjpterus specimens, namely : 

 of Palcconiscus Vratislaviensis, Ag., from Ruppersdorf, Bohe- 

 mia ; of Palcconiscus Duvernoy, Ag , from Miinster-Appel, 

 near Kreuznach, Prussia ; of Palceoniscus, from the Albert 

 Mine, New Brunswick, and from Horton Bluff, Nova Scotia ; 

 of Palcconiscus, from Burdie House, near Edinburgh ; of Am- 

 blypterus macropterus, Ag , from Saarbriick, Prussia ; of Am- 

 blypterus eupterygius, Ag., from Saarbriick, Prussia ; of Am- 

 blypterus lalus, Ag., from Saarbriick, Lebach ; of Amblypterus 

 lateralis, Ag., from Saarbriick, Lebach ; of Acanthodes B/onnii, 

 Ag., from Saarbriick. 



Besides, we have many well-preserved Iclithyodorulitcs speci- 

 mens from this period, and many teeth of the genera Orodus, 

 Cladodus, Psammodus, Cochliodus, Chomatodus, Ilelodus, Pet- 

 alodus and Ctenoptychius. 



(c) The Permian system is represented by several Palccon- 

 iscus species, namely : Palcconiscus Freieslebeni, Ag., from 

 Mansfeid, Thuringia ; Palcconiscus magnus, Ag.. from Mans- 

 feld, Thuringia ; Palceoniscus comptus, Ag., from the mag- 

 nesian limestone of Midderidge, England ; Palcconiscus mac- 

 rophthalmus, Ag., from the magnesian limestone of England ; 

 Palcconiscus glaphyrus, Ag., from the magnesian limestone of 

 England ; Palcconiscus elegans, Sedgw., from the magnesian 

 limestone of England ; further, by Pygopterus Humboldtii, Ag., 

 from Mansfeid ; Platysomus gibbosus, Ag., from Mansfeid ; 

 Acrolepis asper, Ag., from Mansfeid. 



(d) The Triasique system is represented by teeth of the 

 genera Hybodus, Placodus, Ceratodus and Saurichthys ; further 

 by a large number of fish-remains from the sandstone of the 

 Connecticut River. 



(e) The Jurassique system is represented by many well- 

 preserved Ichlhyodorulites specimens from the lias of Lyme- 

 Regis, England ; by many well-preserved specimens of Dape- 

 dius politus, de la Bcche, from the lias of Lyme-Regis ; of 

 Dapedius granulatus, Ag., from the lias of Lyme-Regis ; of 

 Dapedius punctalus, Ag., from the lias of Lyme-Regis ; of 

 Dapedius Colei, Ag., from the lias of Lyme-Regis ; of Dape- 



