WARD.] . DISCUSSION OF THE TABLE. 429 
Table of distribution of fossil plants of Older Mesozoic of the United Stales—Continued. 
Triassic. Jurassic. 
Con- s 
A Hudson- South-| % 
3 Pvetley | Potomac western 5 a 
area: area, area. | | 3 
’ ay8 |. 
No. Name, 8 & 3 & 
3 aiS/8 
; ‘ 8 Sluzle : 
ager & a fa] % 1a [a 3 
: o/s g;o|38 3 
2/8/e)alal/5/2/2 2/4] .| a 
B/S) 2/5 |: g\*¥| -|El¢lels/Pl/2 
S/s,;s/n/2/S/Sl8] 4 i Sig lela 
8 din a |e a P= =| S. s a FI 
pig lelele % SlelSleleleisl]sis 
Blo /SiSi/S8/Sl/a /e#i/e/Si8lalels 
S(SizielSsliFlzizi/4/E/slo|Sl/F18 
184 | Yorkia gramineoides 
WArOlNs 8D cise ciec cases Laiesstel| Sercete | ejeieres | 
185 | Zamiostrobus virginiensis 
ON Gar vane sens icvouen ce iS ise Nese ence eR BS 4. OK, [wists sl Missal uciniel| ato Selacel| taal secccalla oe 
186 | Zamites occidentalis Newb. caret) sec otae| ev alec es | 2 yell eva] OS Asser esac nal See | Gaeleeale oar 
187 | Zamites pennsylvanicus, : 
POD, Piss wesercelrae wk estidnal esencet llararel | ANG: | laveve ral lstatere lates pate racet| era rats orerselb rend ees elbewtiatal pera 
188 | Zamites Powelli Font...... cis 2| Sesie Mewtlaceedecwdlecaels aac] (Seana ecaa ena taceelecealteadtenes 
189 | Zamites yorkensis Font. n. 
BP sccaicieaieieis sie oS iaieiojsleioaisia x 
DISCUSSION OF THE TABLE. 
In this table there are 189 separate entries. It would be too much 
to say that it represents that many distinct species, and yet each entry 
stands for a different form, so far as the nature of the material enables 
us to judge. Quite a number are early determinations that have not 
been recently examined, some of them, perhaps, no longer represented 
by types that can now be found, and therefore they have little real 
value, but having gone unchallenged into the literature, it seems best 
to keep them in view, in the hope that they may some time receive 
attention. 
It will be observed that very few species are common to the Triassic 
and Jurassic as here recorded. Badera multifida Font., of the Rich- 
mond coal field, is identified with doubts in the Oroville flora, and 
Pagiophyllum Willéamsonis (Brongn.) Font., of the Yorkshire Oolite, 
found at Oroville, also occurs in doubtful forms in the Trias of both 
Virginia and North Carolina. Sagenopteris Nilsoniana, a polymor- 
phous species, which will doubtless be subdivided into several species, 
was found in the Richmond and North Carolina coal fields and reap- 
pears in the Oroville florula. 
Next in interest come the species common to the eastern and western 
Triassic beds. Cheirolepis Muenster (Schenk) Schimp., found through- 
out the Newark system, occurs also in the Trias of New Mexico. The 
same is true of Ctenophyllum grandifolium Font., common in the Vir- 
ginia area, and found by Mr. Wanner in the ie of York County, 
