102 
Psyche 
[December 
Paralogus aeschnoides Scudder 
Text figure 2. 
Paralogus aeschnoides Scudder, 1893, U. S. Geol. Surv., Bull. 101: 21; pi. 1, 
fig. a. 
The unique specimen on which this species was based was collected 
by Mr. F. P. Gorham ( 1889) in Upper Carboniferous rocks at Silver 
Spring, East Providence, Rhode Island, and was donated to the 
Museum of Comparative Zoology by Professor Gorham in 1932. 
It consists of a well-preserved wing, about two-thirds complete. 
Scudder’s drawing of the fossil is good and even shows by means of 
shading the convexity and concavity of the veins. I have included 
here a new description and an original illustration of the fossil, in part 
because a few details of phylogenetic significance were not clearly 
indicated by Scudder and in part because Dr. Fraser’s recent illustra- 
tion of the fossil (presumably based on Scudder’s drawing) is mis- 
leading in several important respects. 
Text figure 2. Drawing of Paralogus aeschnoides Scudder (holotype). 
Lettering as in text figure 1. 
The wing fragment, as preserved, is 54 mm. long, and has a maxi- 
mum width of 19 mm. ; the complete wing was probably about 80 mm. 
long. T he subcosta terminates a short distance beyond the middle of 
the wing and beyond the point of separation of R2 + 3 and R4 + 5. 
The two latter veins diverge widely after their origin ; MA has a 
series of pectinate branches beginning just beyond the divergence of 
R2 + 3 and R4 + 5; just before the level of this divergence, iA sepa- 
rates into a divergent fork and sends a series of additional branches 
towards the distal part of the wing. 
The wing itself is broad for a protodonate and has a strongly curved 
posterior margin. However, on the basis of our knowledge of the 
differences between the fore and hind wings of Meganeuridae, I 
