2G4 FOMsll. I'LAN IS FKOM TKXAs — I'ONT.MXE. 



(lotoiiun.oi'li;n:ut('r. Tlio piinuiU's or lat'iiiiu' Ikinc tlic imrrow olonjiatc 

 sliapo, the oblKiHc iiisortion, ;iiul llio linn cousistoiicy «;iveii lor aS. 

 ralth'iisis. The iieiM's wore not distinctly seen, bnt appoar to be' single 

 m each lacinia or ])innnle, as in the plant from rortnual. lleei* iden 

 titles his plant with iS. ,/ lu/lcri, l-'ttin^s, and with ,lci(Hp((ulia iicrrostt 

 Dnnk.. ol the \Vcahl«Mi (»f llanoMT. This type ot" lern seems to ha\e 

 been a common one m the W'eahleii of lOnrope. 



OYCADS. 



The eyeads, althoniili not very abundant in the Glen Kose fossils, 

 stand next to the conifers. They are m a very fraiiinentary condition, 

 but still snlVice to enal>le one to determine, m a number ol' cases, the 

 character ol the plant with some certainty. Fortunately the character 

 of some of these forms is so marked that they are readily identilied. 



Dioonites Buchianus, var. larinervis vai. uox . 

 I'l. XXXVI, Fi^s. 3. 1. 



This [)lant a.urees in all respects, except the nerves, with the tyi)ieal 

 Oioonites BHclmnnoi. It lias the same thick durable epidermis, the same 

 sha])e, diuiensions, and mode of insertion of the leallets, and the same 

 character of stem. The nerves are stronjier, fewer in number, and 

 more remote than in the typical form so common in the Potomac ol' 

 Virsi'inia. They fork near the base of the leaflets, but have the nlti 

 mate branches only live to seven in number. Fij>". •> .ii"'^'^'''^ '^ portion of 

 a leaf ol' medium size and shows the insertions of leallets. Fii;-. 4 re])re 

 sents a ti'rminal portion (?f a leaflet of lai\u,e size showing" the nerves. 

 A considerable number (live to six) of specimens of this plant, were 

 found, and if we mayjudue from this, it was one of the more common 

 cy calls of the CUen Kose reuion. 



Dioonites Buchianus Siliiiniier. 

 I'l. XXXVI, Fi<>'. r>. 



This ])lant. tirst found in the (\iri)atliian I'l gonian beds of (h'odischt, 

 and later seen to be distributed in great abundance in the Totomac 

 strata of Virginia, was without doubt present in th«> Texas Trinity flora. 

 It is, however, (piite rare in the ty[»ical form as a fossil in the (ilen Kose 

 strata. At least two well cliaraetcrized sptHimens of it, dill'ering in no 

 respect from the Virginia fossils, have been obtained. The si)ecimens 

 show the usual tine closely placed nerves of the true />. I>i(clii(tiiiis, 

 covered with a firm durable ei)idermis. As I have endeaxored in pic 

 vious statements to show, no conclusion can be safely drawn frimi the 

 rarity of the fossils as to the relative abundance of the form in the 

 Trinity H«ua. 



■ •Finn, in-^silf (hi rniiimal,' ji. II. IM. xv. Figs. !»-14. 



