^"iHofK'] !'K<)('Ki;i)i\(is OK rill-: national i\iijskiim. 273 



pl;iiil it«»\v ill (|iM',sti<»ii. \\'liil<' sonic N'iives, as j^ivcii by Sapoita, liavc 

 tiaiix't'iscly cloii^aicd, iiioic or less roiiiidcd, <»i' rlioiiihic tonus, (licy 

 mostly appear wil li cllipt !<• or iiioiiihi«' shapes, ('loii;;at('(l in the diree, 

 tioii ol" the axis of liie stem, with a. eoiisideralde portion tree, more oi- 

 less i<Miiote IVom the stem, (»tteii iiieniN inii, with the whole leal' miieh 

 thickened. This Texas ])lant docs not liasc. these features. 



The l<'Ji\'es of /'. (hihiiim are very lar.i;e in proporli(»ii to the diaiiieler 

 of the twi;;s, s(» that a single leaf often extends across the whole upper 

 surface, of tho stem, as is shown in 1*1. XXXIX, I^'i^s. ."{ and 1, which 

 represent; their more common foiins. The <*oiies are nearly always 

 sinj;le, af the tips of short, sloiil Iwi^^s, Imf PI. \x.xix, Vi}x. 5 j;iv(\s a 

 pair of cones, which appear at the sninmit <»f the twi};". The shape 

 and si/e of the cones of this plant remind one stronj;ly of those of 

 S(^<pioia. The resemblance is increased when t hecoiie scales aie, re- 

 tained, bill have lost, their beak lik(s projections. Tiiis s(»rt of cone is 

 shown in I'l. xxxix, V\}X- <"». IMat«^xxxix, I<'i^-. 7, shows thedimensionsof 

 (Hieof tlu>, largest cones, and also the character of the imprints left, wluMi 

 tlie eone scales are reiiiove<l. This cone shows, at the summit, of the 

 twi;^' which bears it, abbre\ iated leaves, such as are represent^*! in IM. 

 XXXIX, Vi}!;. S, other cone bearing' twi^s have such lea ves as are, ^^iveii in 

 VI. XXXIX, Vi}i;. 1>. J^'i^iiresS and !> ji'ive ina;;nilied portions of the t\vij;'s. 

 I'lat(^ XXXIX, V\}i. H) juivesscNcral leaves coiisiderabI,\- ma|;iiilie,d to show 

 the lilies of stomata. IMatc xxxix, Fig. 1 1 gives a twig to which a short 

 (;oiie-beariiig twig is attached. 



Frenelopsis vaiiaiis sp. imv. 



1*1. XL, l'ij;s. 1-1.'; IM. xi.i, Fi^H. l-:{f/. 



'^Free or shrub with peiiiiltiiiiafe and iiltimate branches alone ob- 

 tained. These were, oiiginally <piite h»iig, snccnhMil, and cylindrical, 

 with J(»iiits of varying length. The ultimate twigs se<'m to have played 

 the part of IeaA'<'s. The largest penult iiiiate branches have a. very 

 small woody axis; IIm- ultimate ones usually show little, or no woody 

 tissue. All tlui branches found fossil ap|)ear as Hat, ribboiisha[»e<l 

 strips of \('getal)le matter, composed almost w holly <»f parehment-Iike, 

 very durable, epidermal tissue, cut at varying intervals bylines of 

 eonstrielion which represent, the, llod(^s. The twigs are v(My prone to 

 brc^ak at. these nodes, hence they usually present the form of fragments 

 without preservation of their summits and l)ases. The epidermis is 

 marked by lines of dot-like imprints, which are not distinctly visible 

 without the help of a lens. The, int<'rnodes \ary much in hingth and 

 oft(Mi irr<'gularly, especially in the ultimate twigs. '^FIm^ sometimes 

 appear uniformly short jointed, and I hen areexa(;tly like F. parceramofta* 

 of tlie Potomac formation of \'irginia, and from this cause I at 

 lirst thought, it identical with that jdaiil. 'i'his uniformly short 



* Moii(t;;niitii w, i;. >S. (ioolttgicul Kiavey, Piut i, text, pp. 218-220. 



Proc. N. M. 0;j 18 



