. Maryland geological survey. ., vol. xlviii, 1905, p. 238, pi. Ixv, fig. 46,Chiropteris spatulata Knowlton, 1907, Smith. Misc, Coll., vol. 1, pt, i, p. 114. Description.—Stipe stout, apparently crowned with five palmately ar-ranged pinnae. No pinnae have been found attached, but one specimenshows five lying disposed around the summit of the stipe. If these reallywere attached as described by Fontaine they may represent simply avariation and not even constitute a specific character, although no five-parted Sagenopteris has been heretofore described. Pinnse variable insize, inequilateral, lance
. Maryland geological survey. ., vol. xlviii, 1905, p. 238, pi. Ixv, fig. 46,Chiropteris spatulata Knowlton, 1907, Smith. Misc, Coll., vol. 1, pt, i, p. 114. Description.—Stipe stout, apparently crowned with five palmately ar-ranged pinnae. No pinnae have been found attached, but one specimenshows five lying disposed around the summit of the stipe. If these reallywere attached as described by Fontaine they may represent simply avariation and not even constitute a specific character, although no five-parted Sagenopteris has been heretofore described. Pinnse variable insize, inequilateral, lanceolate to ovate, obtusely pointed above, graduallynarrowed below, 3,5 em, to 10 cm. in length by cm, to 3,6 cm, in greatest width, the upper or terminal ones being the largest. Midrib19 •288 Systematic Paleontology broad at the base, disappearing before reaching the apex. Lateral veinsbranching at a variable acute angle, anastomosing to form irregularmeshes which are subrhombic in some specimens and very much elongated. Fig. 4.—Restoration of Sagenopteris elliptica about natural size. with few anastomoses in others. Fontaine describes minute elevationsbetween the veins on the lower surface which he thinks indicate polypo-diaceous fructifications. These are said to be distinctly seen only withthe aid of a lens, and yet they are mm. long in the specimen figured Maryland Geological Survey 289 natural size. The present writer has failed to find any trace of thesesupposed fructifications. This species is not common in the later Potomac, and the specimensfrom Federal Hill, Maryland, are not perfect enough to determine withcertainty their identity with those from near Potomac Run, has recorded this same form from the Queen Charlotte Isl-ands, and it is frequent in the Shasta of California. The Kootanieoccurrence is based on forms described by Newberry as a species ofChiropteris and differentiated from Sagenopteris, primarily because ofthe infrequency of
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