"RE II ARKS ON CEPHALASPIDES. 



141 



puzzles me, as I am not aware of any such neutral ground, the one 

 being always supposed to follow the other consecutively. 



Again, he mistakes in calling beds in the quarry in the drive to 

 Downton Hall (at bottom of page) Tilestones- They are unques- 

 tionably Old Red beds of thick sandstone, and with the same corn- 

 stone as he found at the Devil's mouth, containing G&phalaspis 

 Lyellii and Pteraspis rostratus. 



I will take this opportunity of noticing that my friend Marston 

 has made little mistake in his list of fossils from the Old Red near 

 Ludlow. I will venture to assert that no Cejjlialasjjis Salweiji has 

 ever been found in Oakley Park quarry, which lies in the lower beds 

 of the Old Red, probably but little above the Passage beds. It does 

 contain a Cephaspid, but as yet it is unnamed, and the original speci- 

 men of G. SaliL-eyi came from beds very much higher up, at Acton 

 Beauchamp, near Bromyard. — I remain, dear Sir, yours obediently, 

 Robert Lightbody, Ludlow. 



CEPHALASPIS FROM OLD RED SANDSTONE NEAR 

 LUDLOW, 



We think it a very necessary appendix to the above correspondence 

 on Mr. Roberts' article to give an outline figure of a very nearly 

 perfect Cephalaspis Lyellii, found in the Old Red Sandstone strata 

 near Ludlow, by Mr. A. Marston, who kindly transmitted it to us in 

 October last, with another large and more beautifully preserved head. 



Cephalaspis from Old Red near Ludlow. 



These specimens we have just forwarded to Mr. Salter, so we may 

 hope for a full and efficient notice of them in the forthcoming mono- 

 graph of the Government paleontologists on these ancient fishes.— 

 Ed. Geol. 



