76 BOTANICAL GAZETTE [august 



but he redrew the types of Potonie and reproduced them (i6, p. 64, 

 Jig. 16), remarking that an apparently non-septate sporangium, in 

 place, with a thin plate of tissue extending for a short distance 

 beyond it, above, might indicate an intimate relation with Lepido- 

 carpon if this plate of tissue proved to be part of an investing 

 membrane about a megasporangium. The same paper (p. 62) 

 describes another Spitzbergen species, L. riparium, which is com- 

 pared with Lepidocarpon. Although the originals of figs. 17 and 

 18 on pi. 13 occur in juxtaposition, we shall not hereafter include 

 in this species the first named. In his contribution to the Carbon- 

 iferous Flora of Northeastern Greenland, Nathorst (15) has 

 appended to a series of figures of " Lepidophyllum cf. lanceolatum'^ 

 two figures (34 and 35), concerning which he remarks that it is 

 difficult to ascertain whether or not they belong to the same species 

 as the others. It seems apparent that they do not, but instead 

 constitute a species of Cantheliophorus. We shall not attempt, 

 however, the description of a new species from these figures. 



To the several species already discussed, 5 sharply characterized 

 new species (novaculatus, ensifer, sicatus, robustus, grandis) are 

 added, based upon material collected by the author from Mary- 

 land, a sixth {subulatus) based upon material from Kansas in the 

 Lacoe Collection at the United States National Museum,- and a 

 s'eventh ipugiatus), already mentioned, based upon material from 

 the Northern Anthracite Coal Basin of Pennsylvania. 



Generic characters 



In this genus the sporophylls, of which the organization is 

 somewhat complex, are borne in spiral arrangement upon an 

 axis in the formation of a strobilus. This axis has not been 

 observed, but the nature of the cortex is apparently such that 

 upon the disintegration or disruption of the cone a narrow linear 

 fragment invariably remains attached to the proximal extremity 

 of the sporophyll pedicel. The dismemberment of the cone at 

 maturity was apparently very complete, for in a large collection 

 of these forms only 3 cases were observed where sporophylls are 



^ This is the material listed by David White as Lepidostrobus cultriformis in 

 Bull. 211, U.S. Geol. Survey, 1903, p. 105 (excl. Lacoe Coll. nos. 16092, 16093). 



