88 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL, XXXIY. 
situated on the ear; the large posterior muscular scar is obscure. 
Surface ornamentation fine or strong radial ribs on body and wing 
and occasionally on ear of left valve; radial ribs on body of right 
valve occasionally strong but generally obscure. Size smaller than 
many pterinoids, largest specimens from Maine collections rarely over 
35 mm. long. : 
Several species of this type have been recognized in the Chapman 
fauna of Maine, the description of which was in process when Clarke’s 
paper on Some new Devonic Fossils was issued. The species referred 
to were found to differ from Actinoptera Hall in their interior char- 
acters, and they differ also from the radially sculptured Pterineas 
of Goldfuss in having the right valve convex from the beak out to the 
ventral margin, though less convex than the left valve (not resupi- 
nate as In my hew genus 7’olmaia.) 
In the description of Pterinea radialis Clarke refers to teeth and 
anterior muscular scar in combination with an Actinopteria-like ex- 
terior, but in figuring the species he has given first two figures of the 
exterior of Actinopterella followed by two figures of Follmannella, 
new genus. 
In citing the name Pterinea radialis Clarke as type of the genus the 
latter two figures are not included and the statement that the “ hinge 
line is but slightly extended ” does not apply to specimens of the 
genus Actinopterella although it does apply to Yollmannella repre- 
sented by the lower two figures. 
Pterinea edmundi Clarke “ also belongs to the genus Actinopterella. 
The description and figures of Pterinotella peninsulw Clarke » also 
indicate molds of the interior of right valves of this same species. 
Because of the uncertainty and confusion occasioned by the wording 
and figures given under the name Pterinea radialis Clarke, the fol- 
lowing brief definition of Actinopterella radialis, based upon speci- 
mens collected for the U. S. Geological Survey, is here given. The 
illustration and full discussion of the species is reserved for the mono- 
graph of the Chapman Fauna now in preparation. 
ACTINOPTERELLA RADIALIS Clarke, sensu stricto. 
1907. Pterinotella radialis CLARKE, part, N. Y. State Mus. Bull. No. 107, 
p. 207, upper figures only (the lower figures represent the characters 
of Follmannella, new genus). Eodevonian, Presque Isle Stream, 
Chapman Plantation, Aroostook County, Maine. 
1907. Pterinotella peninsule CLARKE, N. Y. State Mus. Bull. No. 107, 
p. 212, figs. on p. 218. Eodevonic, Presque Isle Stream, Chapman 
Plantation, Maine. Tr 
Specific diagnosis ——Shells obliquely rhomboid; hinge line long, 
equaling greatest width of shell; anterior ear and posterior wing 
“Some new Devonic Fossils, p. 208. bTdem., p. 212. 
