VI LIST OF THE PLATES. 
Plate. 
Cyead trunk and silicified wood from the Potomac of Maryland_.-......-..----.-.------- LXXXI 
Trunks of cycads early discovered in the Potomac of Maryland.....-...---.---.--------- LXXXI-LXXXVI 
Group of eyeads in the Museum of the Woman’s College of Baltimore...--.....-.--------- LXXXVII 
View of the Link Gulch with the Link eyead in place.-........-...-.------------------- LXXXVIII 
Group of cyeads in the Museum of the Woman’s College of Baltimore. .........-.--------- LXXXIX 
C@ycadeoideatmarylandicas: ct a0saa sean cae ose oe eae cae ae eee eae XO-XclL 
CycadeoideaTysoniana 20. 22-3. 425.22. ee nese ae ee ee He eee ee ee eee eee XCIL 
Cycadeoides; McGeeanazx2 iss Sob 8 Ste ie eee a sre se Sic eee ier eRe erator XCIV 
‘CycadeoideaMonbaineanatrae ps Sees = Mise lea eee ee ereferet an siete ee eee rere fa la alae ge ea tel seatete ior XCV—XCVIII 
Cycadeoidea (Goucherianant: S23 leen 2 occa ascent ee oe eae XCIX 
Cycadeoides Whleric: 22522255 orc.coeen ne sae eee ee ee eee eRe eerste c 
Cycadeoidea Bibbinsiz203s2 soc )2n 2 oe Se te oye ese ere ee ee eco et eee are CI-CIV 
Cycadeoides ,Misherse:.2.)26/5 ioe oh eae a a erate eee eae eee eer tN cv 
C@ycadeoides;Clarkian aie WU et Sse ese ue ees e ayy. ey cls See ENC ete veep ne Uae CVI 
Fossil plants from the Potomac of Virginia, the District of Columbia, and Maryland......-. OVII-OXIX 
