FISH BELONGING TO THE GENUS CLIMAXODUS. 309 



Pleuracanthus l^vissimus, Ag. 



Several fine interesting spines, in a good state of preservation, 

 have occurred. 



Oethacanthus cylindricus, Ag. 



Numerous large vs^ell-preserved specimens of this fish-spine 

 have been obtained. 



Ctenacanthus hybodioides, Ag. 



Five specimens have occurred, in a nearly perfect state of 

 preservation ; one specimen is eight inches long. 



Leptacanthus, sp. indet. 



A spine or two, apparently belonging to this genus, have oc- 

 curred at Newsham. 



Cladodus mirabilis, Ag. 



Numerous specimens of the teeth, frequently associated with 

 patches of dermal granules, have been found in several distant 

 localities. 



Pleurodus Rankinii, Ag, 

 Numerous specimens of the teeth have occurred. 



PcEciLODus, sp. indet. 

 Numerous specimens belonging to this genus have been found. 



Petalodus, sp. indet. 

 Several teeth have been procured from the Low-Main Shale. 



Gosforth, October 1th, 1868. 



