New Species of Fossil Plants. 491 
eral ones linear arched. In its corticated state, the whole 
surface is narrowly undulate striate, the striæ diverging only 
above the vascular scars which are oval; the two exterior 
ones, in the length, the central one crosswise. 
76. SIGILLARIA SCHIMPERI (spec. nov.). Surface undulate, 
narrowly plaited and striate crosswise. Scars one inch dis- 
tant, large, striate in the same direction as the intervals, nearly 
round in outline ; the upper marginal line well marked, 
half circular, and extending horizontally on both sides; the 
inferior one slightly marked, half circular. Vascular scars 
two, oval, placed below an arched, linear depression. 
TT. SrGiLLARIA STELLATA (spec. nov.). Surface deeply 
marked with undulate, branching wrinkles, diverging in every 
direction from the smooth scars around them. Scars nearly 
plane, regularly hexagonal, the upper side only obtusely 
emarginate. Vascular scars three; the medial one semilu- 
nar, the lateral ones oval-pointed downwards and diverging 
to the sides, ; 
78. SIGILLÀNTA. pourra (spec. nov.). Stem ribbed, ribs 
nearly plane, very smooth, as broad as the distance between 
the scars; furrows narrow, deep, and straight; scars discoid, 
enlarged both sides, round above, the lower margin convex, 
With two lateral angles very obtuse. Vascular scars three; 
the medial one transversal linear, straight in the middle and : 
convex at both ends; the lateral ones linear, arched. : 
19. Siginuarra DUBIA (spec. nov.). Like Sigillaria Cortei 
Brongt ; differs by the greater distance of the scars, which 
are broader at the base, and by the ribs being more deeply 
striate. i 
80. SrempAnIA OBOVATA (spec. nov.). Stem ribbed ; ribs 
More than one inch broad, nearly flat, obsoletely striate ; fur- 
rows deep and narrow ; scars obovate, with the inferior margin 
Very obtuse. Vascular scars three; the medial one linear, 
Short, the lateral ones slightly arched. 
Sh Biitsanr« prscCOTDEA (spec- nov.). Stems furrowed ; 
furrows distant, irregular, deeply marked, and wrinkled ; dis- 
