EXPLANATION OF PLATES. 
PLATE XLIV. 
Fic. 1.—Pseudopecopteris pluckenetti (Schloth.) Lesqx. The basal part of 
a small pinna, showing the winged rachis and ovate pinnules, with a 
few thin veins. From the Chanute shales. No. 550, University of 
Kansas collection. Three times natural size. 
Figs. 2, 3.—Pseudopecopteris cf. dimorpha. Pinnules showing venation. 
From the Lawrence shales, Twinmound. No. 590, University of Kan- 
sas Collection. Natural size. 
Fic. 4.—Mariopteris occidentalis D.W. A single pinnule, showing vena- 
tion. From the Cherokee shales, Lansing. No. 401, University of 
Kansas collection. Three times natural size. 
Fic. 5.—Sphenopteris pinatifida (Lesqx.) D.W. Pinnez and pinnules of 
this species, showing typical form. From the Le Roy shales at Blue 
Mound. No. 906, University of Kansas collection. Twice natural size. 
Fas. 6-8.—Sphenopteris cf. biturica Zeiller. Normal form of pinne and 
pinnules of this species. From the Le Roy shales at the Haverkampf 
farm. No. 926, University of Kansas collection. Twice natural size. 
Fies. 9,10.—Sphenopteris sp. A delicate Sphenopteris with thin frond 
and flexuous veins forking once at a wide angle. From the Le Roy 
shales at Blue Mound. No. 790, University of Kansas collection. 
Figure 9, natural size; figure 10, three times natural size. 
Fic. 11.—Eremopteris solida (Lesqx.) D.W. A small pinna, showing the 
bifid pinnules marked with indistinct strize. From the Cherokee shales 
at Lansing, Kan. No. 100, University of Kansas collection. Twice 
natural size. 
Fig 12.—EHremopteris missouriensis Lesqx. A small pinna, showing the 
narrow pinnules. From the Cherokee shales, Lansing. No. 125, Uni- 
versity of Kansas collection. Twice natural size. 
Fig. 13.—Aloiopteris winslovu D. W. One of the long, slender pinnules 
of this species. From the Le Roy shales. No. 10038, University of 
Kansas collection. Twice natural size. 
Fic. 14.—Aloiopteris winslovii D.W. Enlarged to show detail of vena- 
tion. From the Chanute shales, Thayer. No. 1003, University of 
Kansas collection. Twice natural size. 
Fic. 15.—Aloiopteris winslovri D. W. Details of a pinnule from the Cha- 
nute shales, Thayer. No. 1000, University of Kansas collection. 
Twice natural size. 
Fig. 16.—Alotopteris winslovti D.W. Rachis with Aphlebia pinnule. 
From the Chanute shales, Thayer. No. 1000, University of Kansas 
collection. Natural size. 
Fic. 17.—Aloiopteris winslovi D. W. Apex of a long pinnule with flexu- 
ous veins. From the Lawrence shales at Twinmound. No. 990, Uni- 
versity of Kansas collection. Twice natural size. 
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