1963] 
Carpenter — Brodioptera 
63 
terminal ones forming a dichotomous fork. MA arises slightly basad 
of the level of the origin of Rs; MP with three branches; the six 
terminal branches of CuP are formed by bifurcation of three main 
branches, although their origin is not preserved in the fossil. The 
venational details are shown in text figure 2. 
Type no. 10392 (obverse and reverse), Geological Survey of Can- 
ada. The specimen was collected by Henry M. Ami, in 1899, speci- 
fically at Howard’s Mills, River Wallace, Cumberland County, Nova 
Scotia. This is placed by Dr. Copeland in the Riversdale group. The 
fossil consists of a moderately well-preserved wing, lacking only the 
base of the anal area and a part extending out towards the center of 
the wing from the base. The convexities and concavities of the veins 
are clearly shown but there are no indications of cross veins or of an 
archedictyon. The distal part of this wing is preserved on the counter- 
part; the rest of the wing is preserved in one piece. 
As indicated above under discussion of the family relationships, the 
affinites of this fossil are not at all clear. That it is a palaeodictyop- 
teron is obvious; however, the absence of an archedictyon or a cross 
venational system leaves us somewhat uncertain about its relationships. 
The main venational pattern, as indicated above, conforms to that of 
the Dictyoneuridae. 
