444 Mr. W. N. Edwards on Parkia decipiens. 
body some rather obscure round markings can be seen, which 
are probably the impressions of the well-known “ dises” of 
Parka, but there is no trace of carbonaceous matter. The 
specimen is only slightly smaller than the smallest example 
found by Don and Hickling, which was about 5 mm. in 
diameter, and it seems possible that it is actually a small 
specimen of Parka borne on a slender stalk, At any rate, it 
is hoped that the figuring of this interesting fossil will stimulate 
the search for further material which might help to elucidate 
the problem, For it is unfortunate that the axis of this 
specimen is too small and incomplete to allow o£ comparison 
with any known plant-impressions from the Old Red Sand- 
stone or to give any idea of the appearance of the whole 
plant. There is a possibility that Parka may have been 
normally attached only in its young stage, though much 
larger specimens have been found which are appareutly 
stalked, such as the one figured by Reid, Graham, and 
Maenair, and referred to above. Another example is the 
second of the two specimens to be mentioned in this note, 
no. V. 12643 (see Pl. XII. fig. 5). The plant-body is 
roughly circular, about 2°2 cm. in diameter, and has the 
appearance of being attached to a fragment of stalk, though 
possibly the juxtaposition may be accidental, for the point of 
attachment does not seem to have been at the margin. 
While affording little further evidence as to the exact 
nature and systematie position of this plant, the occurrence of 
such specimens shows that we are not yet justified in regarding 
Farka as an entirely independent organism. 
EXPLANATION OF PLATE XII. Fies. 4 & 5. 
Fig. 4. ? Parka decipiens, F)., from the lower Old Red Sandstone of 
Canterland, Kincardineshire. Mitchell Coll., Brit. Mus, Nat. 
Hist. Geol. Dept., V. 3247. x 2. : 
Fig. 5, Parka decipiens, Fl., with apparent stalk, from the same locality 
and horizon. Mitchell Coll., Brit. Mus. Nat. Hist. Geol. Dept., 
V. 12643. x 4. 
The photographs are by Mr. P. Dollman. I am indebted to Miss W. 
How for the drawing of the text-figure. 
