94 THE CANADIAN NATURALIST. [Vol. X. 



the Lower Gaspe sandstones, nnd secondly, that the former as 

 well as the latter belonij to a lower liorizon in the Devonian 

 system than the fish-bearing beds of Scaumenac Bay. The cor- 

 rectness of both of these conclusions seems to be corroborated by 

 what is now known of the fauna of the Campbellton limestones 

 and breccias, which are found to hold entomostraca, together 

 with representatives of the genera Coccosteus, Ceplialaspis, 

 Ctenaconthus, Pterygotus and Spirorhh in common with the 

 Gaspe SJindstones. In Gaspe Bay these sandstones are known 

 to rest directly ;ind conformably upon limestones, the two lower 

 divisions of which are stated by Mr. Billings to be representatives 

 of the Lower Helderberg group, while the two upper have been 

 regarded, by the same authority, as "nearly of the age of the 

 Oriskany sandstone."' From this statement and from the sections 

 published in the Geology of Canada, it would appear that the 

 greater part of the Gaspe sandstones occupy a very low position 

 in the Devonian, but that they are separated from the extreme 

 base of that formation by a thickness of at least 800 feet of lime- 

 stone. At Scaumenac Bay, on the other hand, the fish-bearing 

 beds are immediately overlaid by the sandstones and conglomer- 

 ates of the Bonaventure formation of the Lower Carboniferous, 

 and of the seven genera of fishes now known to occur in the Devo- 

 nian rocks at this locality, not a sitjgle one of them has yet been 

 found in the Gasp^ sandstones or at Campbellton. 



The following descriptions embrace the whole of the species 

 collected at Campbellton by Mr. Foord, with the exception of 

 the Spirorhis, entomostraca and some fin spines and fish teeth 

 which have yet to be studied. 



Fishes. 



Coccosteus Acadicus. Sp. Nov. 



Crani(d shield. Flattened or depressed centrally and a little 

 in advance of the cenrre, but always rising into a broad, low pro- 

 minence on the median line at a short distance from the posterior 

 margin : sides somewhat sloping. General outline that of an 

 ovoid truncated at its broadest extremity, the truncation being- 

 posterior, the length and breadth nearly equal, and the greatest 

 breadth behind the mid-length. Postero-lateral angles {a.a.y 

 somewhat produced : lateral margins most convex posteriorly, 

 slightly concave anteriorly, and with a small but distinct notch 

 (h) a little behind the middle. When the rostral plate (c) is 



