SOME NEW DEVONIC FOSSILS 157 



imate; it bears ii or 12 segments and its apex is not abrupt but 

 merges into a low median ridge continued to the end of the tail. 

 The terminal spine is little more than a broad and short rather 

 obtuse expansion. The surface of the test is finely granulate ex- 

 cept for a few scattered coarser pustules on the axis. The speci- 

 mens average 26 mm in length and 29 mm in width. 



This style of pygidial structure with strongly bifurcate pleural 

 ribs is represented in the faunas of the early Devonic elsewhere 

 by such species as D. bisignatus Clarke (Oriskany) and 

 D. dentatus Barrett (Oriskany). It is probable that the 

 cephala of all have a crenulated or dentate border as D. den- 

 tatus and its associate D. d o 1 p h i Clarke are known to have. 



Lozver Devonic. Grande Greve and Indian Cove, P. Q. 



Dalmanites perceensis nov. 



The parts found of this species are separated pygidia and cra- 

 nidia. In the latter the frontal lobe is gently rounded and de- 

 pressed ; the first and second lateral lobes well fused at their ex- 

 tremities ; the surface of the frontal lobe coarsely papillose. The 



Dalmanites perceensis 



pygidium is broadly triangular, but little arched at the sides ; the 

 lateral margins rounding in full curves and the tail spine short, 

 acute and upturned ; the axis has straight regularly converging 

 dorsal furrows and its width is less than two thirds the width of 

 each pleura. It bears 18-20 broad flat directly transverse annula- 



