Spirifer reidyi? lei'dyi. small. bifurcatal The distinguishing feature of this form is the intercalation of one plication on each side of the 2 forming the median axis of the fold, and of 1 additional plications on each side of the fold, or that part of the lateral slopes which is nearest the fold. Also, one additional plication on the lateral slope, next to the one bordering the sinus. These features apparently are not possessed by Sp. lei'dyi. Since the types of Sp. bifurcata do not show intercalated plications, our specimens can scarcely be identified with the latter. Most if our specimens are distinctly smaller than Sp. lei'dyi. Listed by Ulrich from Spirifer to Birds ville. Similar specimens with less prominent plications seen in Freedonia Spiriferina spinosa? norwoodi? Our specimens have the surface ornamentation of Sp. spinosa (Hall & Clarke, 35) in a general way, but the spines are much shorter, almost granular, and are confined chiefly to the ridges, being usually absent in the lower part of the grooves. In specimens as large as that figured by Hall & Clarke, the number of plications on each side of the sinus usually equals 5. Our specimens may agree with Sp. nor-woodi, but usually are not rounded at the ends of the hinge line. The number of plications on each side of the sinus is 6, and this number sometimes occurs also on each side of the fold. The plications are stronger and narrower, due to the greater depths of the intermediate grooves. Found in Chera. {Paynesville. {Ey Banks Spgs. Burling Green Listed by Ulrich under Sp. ex Norwoodi from {Trihome or Birds ville {Chera {Freedonia {Spotsylvania. Sp. spinosa is listed by Ulrich from the Trihome + Birds ville, and our specimens are much less spiny.