io2 Bulletin 35 250 



Page 181 



dark-red micaceous sandy lamina, the usual parting between 

 the beds of limestone in the quarry named. There is not a 

 vestige of dermal tissue, or of any other portion of the fish, 

 except those described above. (See Plate VIII.) 



Notwithstanding the meagreness of the characters afforded 

 by the specimen, I venture to assign it a provisional name, 

 and a place among the Ganoid fishes, as Acanthodes elongatus. 

 The genus Acanthodes, to which I refer our fossil, is charac- 

 teristic of Devonian and carboniferous rocks ; and, suppos- 

 ing my determination to be near the truth, the additional 

 evidence just furnished is in favour of the view taken by me 

 in the paper referred to at the commencement of this notice 

 as to the probable age of the Blue Limestone series, and its 

 entire distinctness as a formation from the mica and talc- 

 schists and sandstones, the clayslate, quartzite and crystalline 

 limestones of the Caribbean group. 



