FOSSIL PLANTS. 417 



HYMENOPHYLLITES THALLYFORMIS, Sp. nov. 



PI. xvi, fig. 3 to 5. 



The specimen here figured, represents only part of a frond, 

 which, in its whole, appears to have been large and round- 

 ish in outline, with undulate borders and undulate rugose 

 hairy surface. From the emarginate border of the frond, pro- 

 trude cylindrical branches, either erect or creeping, whose 

 form is totally different from that of the frond. These 

 branches, half an inch thick, are covered with ob-lanceolate, 

 obtuse scales or leaves, narrowly striate, as marked, fig. 4, en- 

 larging upwards and closely imbricate. As the scales are 

 mostly crushed upo^n each other, it is not possible to see if these 

 stems are fruit-bearing, like the branches of a Lycopodium, or 

 are merely the base of the stems of some fronds of ferns, and 

 thus only a different representation of the same organs of the 

 plant. The specimen is good, the various parts of the plant 

 are distinct, and the connection between the branches and the 

 frond is evident. 



This kind of development may be compared to that of the Marchantiacese and 

 of the Lycopodiacex with the fronds of the first, and the fruiting-stem of the 

 last family of plants. I suppose that the fragment, represented fig. 5, belongs 

 to the same species. It is apparently the plant in the first development of its 

 frond. The specimen, fig. 5. is in a concretion from Morris; the other is on 

 shale from Colchester. The same species has been found also on the shales 

 from Morris. 



HYMENOPHYLLITES STRONGII, Sp. nov. 



PL xviii, fig. 1. 



STEM half an inch broad, erect, undulately veined or stri- 

 ate in its length, bearing alternate leaves ? covered with long 

 thick hairs or scales, diverging all around. It is not possible 

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