PiNNU. 



64 S 



a great variety of what were evidently roots or rootlets of float- 

 ing seaweeds, branching into the water, free, like bunches of 

 XlUr V f^f^. P^^^ thread, 



C^-i^/'/ "^ and hardly de- 



cs w' serving of the 



■^ ^ --^k \ =*^. specific names 



given to them 

 in the books, 

 such as : con- 

 fervoides^ fig. 

 20 ; fucoides^ 

 fig. 19 ; horis- 

 ontalis^ fi g . 

 21 ; pinnata^ 



'l:^ 





Vi 



r=E|ffiS 



FLI7. 



tM\^ 



rT3 



■f^zt 



■' flfcr 



'1 



mi 



m 



2.1. Fimmlaria h orizo tUalis 



nn. 



fig. 18; also calamitarum, pi. 1, fig, 9 (omitted). P, confer- 

 voides is the only one of them that can be found everywhere 



in the coal measures. The thread 

 like shining lines are in great 

 abundance on the anthracite 

 roof slates of Pennsylvania, and 

 equally abundant in the English 

 and French coals ; from a hairs- 

 brea.lth to one sixteenth inch 

 wide, piled over each other; 

 tubular; never fattened; no trace 

 of joints, or branches, and there 

 fore not confervce; sometimes in the very 

 coal itself; true roots of either the creep- 

 ing or rooting ferns. See also Rhizoli- 

 thes {Pinnularia) jpahnatiUdiis^ Lesq. 

 Arkansas Survey, Vol. 2, p. 313, pi. 5, 

 fig. 9. Of course these roots must have 

 been belonging to various families of 

 f^O plants of the coal age. — In Darlington 

 Goal^ Beaver Co., Pa. Q. 55. XII L — 

 Also over Wayneshurg Coal^ Greene Co., 

 f>ljj Pa. K 59. XF: 



W.Tmimlitriu, confcrvoidr.s 



Pinnularia calamitarum, Lesq. Geo]. Pa. 1858, p. 878. 

 7?innularia confervoides. See figure above. 



XIII 



f,!^ ■? 



^^^ 



XMfv 



MS^. 



I'm 



