Maryland Geological Survey 429 



Taxodium (OlyptostrobusJ hrooTcense Fontaine, 1890, Mon. U. S. Geol. Surv., 



vol. XV, 1889, p. 254, pi. cxxii, fig. 1; pi. cxxiv, figs. 3-9; pi. cxxxi, fig. 



5; pi. clxv, figs. 1-3; pi. clxvi, figs. 4, 7; pi. clxvii, fig. 3. 

 Taxodium (OlyptostrohusJ brooJcense angustifoUum Fontaine, 1890, Mon. 



U. S. Geol. Surv., vol. xv, 1889, p. 256, pi. clxvii, fig. 1. 

 Olyptostrohus 'broolcensis Ward, 1895, 15tli Ann. Rept. U. S. Geol. Surv., 



p. 359. 

 Glyptostrohus drookense angustifoUum Knowlton, 1898, Bull. U. S. Geol. 



Surv., No. 152, p. 112. 

 Glyptostrobus brooJcensis Fontaine, 1906, in "Ward, Mon. U. S. Geol. Surv., 



vol. xlviii, 1905, pp. 481, 489, 495, pi. ex, fig. 1 (non pp. 483, 486, 520 



which are referred to' Arthrotaxopsis expansa Font.). 

 Glyptostro'bus ramosus Ward, 1906, in Fontaine, Mon. U. S. Geol. Surv., 



vol. xlviii, 1906, pp. 281 (?), 489, 544. 

 Glyptostro'bus broolcensis angustifolius Fontaine, 1906, in Ward, Mon. U. S. 



Geol. Surv., vol. xlviii, 1905, p. 489, pi. cviii, fig. 4. 

 Arthrotaxopsis expansa Fontaine, 1906, in Ward, Mon. U. S. Geol. Surv., vol. 



xlviii, 1905, p. 547 (non balance of original citation). 

 'Widdringtonites ramosus Berry, 1911, Proc. U. S. Natl. Mus., vol. xl, p. 302. 



Description. — " The principal stems seen are moderately stout and 

 very rigid, the secondary ones mostly slender and rigid, the ultimate 

 ones usually very long, slender, and unbranched, widespreading, often 

 very delicate and thread-like, going off at an angle of about 45°, but 

 from distortion due to pressure frequently appearing fastigiate and 

 irregularly grouped; leaves on the oldest stems elongate-linear, acute, 

 close appressed, on the younger stems all very narrowly oblong, or nar- 

 rowly elliptical, acute to obtuse, very closely appressed, not distinctly 

 visible without tlie help of a lens in many cases, all spirally arranged ; the 

 facial leaves usually acute, the lateral ones usually more obtuse and 

 sometimes slightly divergent at the tips and incurved; midnerves slender 

 and thread-like." — Fontaine, 1890. 



Since nowhere in the Potomac Group are cones or scales found which 

 indicate the presence of Glyptostro'bus it seems desirable to refer these 

 species and variety of Prof. Fontaine's to the genus Widdringtonites 

 because of their extremely close resemblance to Widdringtonites Beichii 

 (Ettings.) Heer, which is so widespread and characteristic a form in the 

 Cenomanian of both the Old and New World. In fact it may be event- 

 ually desirable to reduce this Patapsco species to the synonymy of the 



