INTRODUCTORY. 



21 



least are common to European rocks of the same period/^ The o<eolo- 

 gical features of the carboniferous rocks of the district are not dwelt 

 upon further than to mention that the fossils occur in beds differino" 

 mineralogically^ some being- hard and crystalline and others arg-illaceous, 

 while a few were from magnesian limestone. Dr. Fleming's separation 

 of the carboniferous rocks into three divisions is also given as follows : — 



c. Upper Limestone : Brachiopoda, and other fossils occur through- 

 out the formation. 



b. Gray sandstone and shales^ in which but few fossils have been 

 found. 



a. Lower limestone, with calcareous sandstone. This limestone 

 generally abounds in large Brachiopoda and other fossils. 



Some of the species described are said to be identical with specimens 

 from such distant localities as Red River, Louisiana, Iowa, New Mexico, 

 Ai-kansas, and Bolivia, on the table-land of the Andes. 



The following" are Mr. Davidson's lists: — 



Collected by De. Fleming. 



Terehratula (vel Waldheimia) Flemingi, 



Dav. 

 T. biplicata Srocchi {?) var. problematica, 



Dav. 

 T. Mimalayensis, Dav. 

 T. suhvesicularis, Dav. 

 Athyris 'Roysii, L'Eveille, sp. 

 A. subtilita, Hall, sp. var. grandis, Dav. 

 Setzia radialis, Phillips, sp, var. 

 H. grandicosta, Dav. 

 Spirifer striata, Martin, sp. 

 S. MoosaTchailensis, Dav. 

 8. lineata, Martin, sp. var. 

 Spiriferina octoplicata, Sow., sp. 

 Mhynchonella pleurodon, Phill. sp, 

 Camarophoria Purdoni, Dav. 



Collected by W. Puedon, Esq., F.G.S, 



Terehratula Himalayensis, Dav. 

 Athyris Roysii, L'Eveille. 

 Athyris subtilita, Hall (?) var. 

 Spirifera MoosaTchailensis, Dav. 

 8. lineata, Martin, var. 

 Rhynchonella pleurodon, Phill. var. 

 Camarophoria Furdoni, Dav. 

 8treptorhynchtis crenistria, Phill. 

 8. pectiniformis, Dav. 

 Productus striatus, Fischer. 

 P. Cora, D'Orh. 

 P. Purdoni, Dav. 

 P. costatus, Sow. 

 P. Humboldtii, D'Orh. 

 P. semireticulatus , Sow. 

 Stroph.alosia Morisiana, King (?) var, 

 ( 21 ) 



