38 
Psyche 
[March 
apical region margined with dark pigment; isolated triangular spots 
at end of R4 + 5, MA, and CuA. Eight outer cross-veins, forming 
a distinct row; CuP and iA forked distally. Other details of vena- 
tion are shown in text-figure 1. 
Holotype: No. 140898, Paleozoic Catalogue #29, U. S. National 
Museum, Washington; collected by Dr. S. H. Mamay, in an outcrop 
on the Emily Irish land grant, about 18 miles south-southeast of 
Seymour, Baylor County, Texas. The fossil is very clearly preserved 
and consists of about the distal half of a wing; the proximal half was 
apparently broken away in the counterpart, which is missing. Slight 
distortion of the anterior margin, just basal of the pterostigma, results 
from a pronounced depression in the rock. Although incomplete, 
this is the best-preserved specimen of a bardohymenid which has yet 
been found. 
Geological age: Lower Permian; Belle Plains Formation (Wichita 
Group) ; this may 1 be approximately correlated with the lower part 
of the Wellington Formation of Oklahoma and Kansas. (See Dunkle 
and Mamay, 1956; and Dunbar, et. al i960). 
The species is named for Mr. Mart Russell, of Seymour, Texas, in 
recognition of the cooperation, hospitality and interest shown to Dr. 
Text-figure 1. Drawing of Actinohymcn russelli, n. sp., based on holotype. 
C, costa ( + ) ; Sc, subcosta ( — ) ; Rl, radius ( + ) ; Rs, radial sector ( — ) ; 
R2, R3, R4+5, branches of radial sector ( ); MA, anterior media (T); 
MP, posterior media ( — ); CuA, anterior cubitus ( + ); CuP, posterior 
cubitus ( ) ; 1A, first anal vein. The irregularities in the costal margin 
have been restored. 
Mamay and his associates during their collecting trips at the Emily 
Irish deposit. 
This remarkable fossil shows a number of interesting features, 
mostly specializations of the anterior marginal area of the wing. As 
in many Eumegasecoptera, such as Prothymenidae and Bardohy- 
