('ONIFERALES. 



169 



Rocky Mountain province. Its n^foroncc to 

 tlio gouus Ptcris is outirclv jiroljknnatic and 

 in the present work is niado entirely in con- 

 formity with previous usage and not l)ased on 

 personal conviction. Its reseud)lanco to the 

 associated species Aspleniiim, (olignitica and to 

 certain modern trojiical asphmiums leads mo 

 to tliinlv it may really l)e referalile to Asplenium. 



It appeal's to hav<» an uncommon element in 

 the Wilcox flora. 



Occurrence. — Wilcox group, \'ineyard BliiH', 

 Cross Bayou, Caddo Parish, La. (collected liy 

 A. C. Veatcli) ; 2f miles southeast of Nalxtrton, 

 li miles northeast of ifansfield, Dt' Soto Par- 

 ish, La. (collected ])y G. C. Matsou ami O. B. 

 Hopkins) ; Grenada format ion, Grenad.-i, Grenada 

 Countv, Miss, (ct)llocted 1)V Vj. N. Lowe and E. 

 W. Berry). 



Colhctions. — U. S. National Miiseum; New 

 York Botanical Gard(!n. 



Phylum SPERMATOPHYTA. 



Class GYMNOSPERMffi. 



Order CYC AD ALES. 



Family CYCADACE^. 



Genus ZAMIA Linne. 



Zamia (?) wiLcoxENSis BeiTy, n. sp. 



Plate CXIV, figure 2. 



Deiicription. — Phmule of medium size, lance- 

 olate in general outline, abruptly narrowed 

 proximad to a constricted base, which is a1)out 

 5 millimeters in Miclth. The distal half of tlio 

 . pmnule is missmg. Estimated length ahout 7 

 or S centimeters. Maximum width, in the mid- 

 dle part of the length, aliout I A centimeters. 

 Margms entire, slightly revolute. Texture co- 

 riaceous. Venation consists of about twenty 

 longitudinal, subparallel, thin but well-marked 

 vehis, slightly reduced m number proximad, 

 where some joui their fellows in dichotomous 

 forks. 



Tlie material is most unsatisfactory for the 

 characterization of a new form, but though it 

 can not be given a proper diagnosis, it is most 

 clearly new to science and unlike anything 

 heretofore knowTi in the Wilco.x flora, so that 

 I prefer to give it a name and trust to the 

 future to furnish more complete material. 

 Wlien compared with the foliage of the two 

 existing species of Zamia found in the Florida 

 region, tiie fossil agrees very closely with Zamia 



puiriUa LinnS of the east coast hammocks. 

 Detailed comparisons witli this or the otlier 

 existmg species of Zamia ai-c obviously willi- 

 out nuich value in the absence of complete 

 mateiial. 



Since Zamia-likt^ foliage is so common and 

 widespread in the Mesozoic and more than .'!() 

 species still exist hi tropical and subtro|>ical 

 ^Vmcrica, two of which ariH'ommon along tl upcast 

 coast of the Florida Peninsula, it was expected 

 that this or some aUicd gtnius of cycads would 

 be found at some point along the Tertiary Gulf 

 coast of southeastern Noi'th America. Not- 

 withstanding the pro])ability of their occur- 

 rence, tln\y are thus far represented ])v the 

 single imperfect s|)ccimen descril)ed and its 

 counterpart. 



Tlie rarity of Tertiary sp(>cies of cycads is 

 res[>onsil)le for the unusual interest excited by 

 their occurrence. Their cosmopolitanism in 

 the Mesozoic seems to have ended almost 

 abi'uptly. France, Switzerland, and Greece 

 have furnished Tertiary species, and Eng(>l- 

 hardt' has described a Zamia from the early 

 Tertiary of South America which is much like 

 this fragment of a Wilcox species. 



Occurrence. — Wilcox group, ih miles south- 

 east of Naborton, Do Soto Parish, La. (col- 

 lected by O. B. Hopkins). 



Collection. — U. S. National Museum. 



Order CONIFERALES. 



Family PINACE^!. 



Genus GLYPTOSTROBUS Endlicher. 



GLYPTOSTROBrs ErEOP.Ers (Brongniart) 

 Hecr. 



Plate XV, ngurc'3. 



Taxodium europxum. Brongiiiurt, Annalei? sci. nat., vol. 



30, p. 168, 1833. 

 Tiuodites eiiropxus. Endlicher, Synopsis conil'erarum, 

 p. 278, 1847. 

 linger. Genera et spefieM ]jlautarum I'oHsilium, ]>. 350, 

 1850. 

 Cupresilcs raeemosus. Goppert, Monographie der I'osBilon 



('oniferen, p. 184, 1850. 

 Glyplo.ilrobus (Eninffensis. Alexander I'.raun in Stizen- 

 berger's Ueberjicht der A'orsteinerungen den Gross- 

 herzogthums Badeu, p. 73, 1851. 

 Heer, in Kegel's Garten Flora, pi. 65, figs. 1, 2, 

 Unger, Iconogi-aphiaplantarum fossiliuni, ji. 21, jil. II, 

 figs. 1-3, 1852. 



• Engelhardt, Herniimn, Spiifkonberjiische naturf. Ocsoll. Ahh., vol. 

 16, pt. 4, p. 046, pi. 2, flg. 10, 1S91. 



