274 FLORA OF LOWER COAL MEASURES OF MISSOUKL 



portions of the leaf are wider. Wliile the fragments from Missouri appear 

 to re^jreseut a species different from any yet described, a specific designation 

 or description of them is postponed pending the discovery of additional 

 better-preser\-ed material. 



Locality — Hobbs's coal mine, U. S. Nat. Mus., Xo. 6076. 



PAL.F:0XYRIS Biouf^niart, 1S2S. 



1828. Palwoxyris Broiiguiart, Auu. Sci. Nat., vol. xv, p. 450; Prodrome, p. 137. 



1810. Carpolithes Morris, Trans. Geol. Soc. London, (2) vol. v, p. 189 (i)ars). 



1852. ^akeobromeliK Ettiugshauseu, Abb d. k.-k. geol. Reiclisaust., vol. i, no. 3, p. 1. 



18(i0. iSporlederia Stiehler, Brouieliaceeu d. Vorwelt, p. 5. 



1872. Spirangium Schimiier, Traite, vol. ii, p. 511. 



Paljeoxyeis appendiculata Lx. 



1870. Palcvoxyris appendiculaia Lesijuereux, Rept. Geol. Snr\-. Illinois, vol. iv, i). 465, 

 pi. xxvii, fig. 11. 



1888. Pakvoxyris appendiculata Lx., Renault and Zeiller, Fl. toss, bassin bouill. Oom- 



mentry, pt. 1, p. 18, pi. xlii, figs. 6, 6a, Qh. 

 1879. Spirangimn appendiculatum Lesquereux, Coal Floi-a, Atlas, p. 1(5, pi. Ixxv, (ig. 12; 

 text, vol. ii (1880), p. 520. 



1889. Spirangium appendiculatum Lx., Saporta, Paleout. franc., Veg. Juiass., vol. iv. 



p. 46, pi. ccxxxi, fig. 3; pi. ccxxx, fig. 3. 



Of this, the most common American species of Pakeoxi/ris, I have seen 

 but a single fragment from Missouri. This specimen shows the narrow, 

 sharp-keeled, equivalvate form characteristic of the species. The ^^alves, 

 which are probably eight in number, cross the flattened capsule at a very 

 wide angle to the axis. 



Mr. Kidston, in his review of the British species of the genus, unites 

 this species Avith the Old World Pdceoxyris carbonaria Schimp. The two 

 forms are undoubtedh' very closely related, biit from an examination of 

 material representing tlie latter species from the vicinity of Dudley, Eng- 

 land, I am couA-inced that the American type is distinguished by the 

 narrower valves, and consequently smaller areolation in the compressed 

 specimens; and while in P. appendiculata the whole organ is, in general, 

 smaller, the dilated portion is proportionately larger. No other equivalvate 

 American species has yet been described which is liable to be mistaken for 

 the one in hand. 



