702 



SILURIAN FOSSILS IN OTHER COUNTRIES. 



Silurian (mineralogically, indeed, true Caradoc Sandstone), demonstrates a succession similar to 

 that of our own country, and completes the parallel of these South African formations with those 

 of England 1 . 



To whatever extent such identifications may hereafter reach, I hope that, in the mean time, the 

 present contribution may, to some extent, enable foreign geologists to compare their older fossili- 

 ferous or "Protozoic" strata with those of Great Britain. 



Allusion has already been made, p. 643, to the substitution of the word Leptcena for Productus. 

 I must also observe, that upon comparing certain descriptions of the rocks with the subsequent 

 pages in which the organic remains are described, the reader will detect a slight want of agreement 

 in the names of a few other fossils ; a discrepancy caused by changes made during the progress of 

 the work. Again, the vertical range of three or four fossils through various deposits is incompletely 

 given in the descriptive part ; but such omissions are, it is hoped, corrected in the following table of 

 the Organic Remains. 



Obs. To the description of the Crinoidea (p. 671.) by Professor Phillips, I omitted to add the names of some of 

 the persons who had contributed to the illustration of this work by the loan of specimens. The beautiful 

 fossil Cyathocrinites goniodactylus (PI. 17, f. 1.), was selected from the choice cabinet of my friend the 

 Marquis of Northampton. This specimen exhibits very distinctly the round branches near its root or base, 

 by which the animal was attached. The remarkable Actinocrinites ? expansus (PI. 17, f. 9.), belongs to Mr. B. 

 Bright. Mrs. Downing communicated the specimens (PI. 17, f. 4, 6 and 8, and PI. 18, f. 3 and 7.) ; and the 

 other forms, with the exception of Hypanthocrinites decorus, alluded to p. 673, are to be seen in the cabinets of 

 Mr. Bright, Mr. H. W. Inwood, and myself.— R. I. M. 



1 It may further be stated, that among the fossils from the Cedar Mountains, is a true Calymene Tristani, 

 Brongn., and a fragment of the head of Homalonotus Herschelii (nob.), so large, that the whole animal can 

 scarcely have been less than the Asaphus tyrannus, var. ornata, nob. PI. 24. 



