PEKNS— SPIEOPTBEIS— OAULOPTERIS. 101 



No sporangia appear in any of the specimens of Brittsia prohlemaflca, 

 although the reilexion of the pinnse, as in Fig. 1, PI. XLVII, is possibly 

 evidence of fertility. The discovery of specimens showing the fructification 

 and the degree of continuity of the lamina about the base of the pinnules is 

 greatly to be desired. 



Locality.— ?\tc\\Qx'B coal bank, U. S. Nat. Mus., 5554, 5555, 5693, 

 5723, 5724, 5811. Additional specimens from the same locahty also sent 

 recently by Dr. J. H. Britts, of Clinton, Missouri. One specimen comes 

 from Hobbs's bank, U. S. Nat. Mus., 5722. 



SPIEOPTEKIS Scbimper, 1869. 



Traite, vol. i, p. 688. 



Spiropterts sp. 



Among the fern fragments from Owen's mine are three pinnae in 

 vernation. These lie close together and are parallel, thus indicating their 

 probable origin from a single frond. The rachises are quite strong and 

 prominently striate-ribbed, not punctate nor scabrous. The characters, so 

 far as they appear, of the inrolled pinnse, less than a centimeter in diameter, 

 favor a reference to Alethopteris cmibigua, with which correlation the charac- 

 ters of the rachis are in agreement. 



Locality. — Owen's coal mine, U. S. Nat. Mus., 6174. 



CAULOPTERIS Liudley and Huttoii, 1832. 



1820. Lepidodendron Sternberg, EI. d. Vorwelt, vol. i, fasc. 1, pp. 20, 23; tent. (1825), 



I), xii (pars). 

 1828. SigiUaria Brougniart, Prodrome, p. 63 (pars). 

 1832. Gauloineris Lindley and Hutton, Foss. Fl. Gt. Brit., vol. i, pi. xlix. 

 1836. SigiUaria — sect. Gcmlopteris Brongniart, Hist. veg. foss., vol. i, p. 417. 

 1845. Stemmatoiiteris Corda, Fl. d. Vorwelt, p. 76. 



Cattlopteris ovalis (Lx. MSS.). 



The above name, although a nomen nudum, will serve in this report to 

 record the presence in the Lower Coal Measures of Missouri of a new 

 species of fern stem, described in the unpublished manuscript on the Amer- 

 ican Coal Flora, by Professor Lesquereux. Although the specimen is 

 referred by the latter to Stemmatopteris, the details of the scar are quite 



