OF LOWER GREENSAND PLANTS. 147 



figs. 4, 4 a) under the name Cedrus Leei, agrees with it closely 

 in size and form. Berry notes that " except for its smaller size, 

 which may be due to immaturity, [his specimen] .... is very 

 close to the European species " of fossil cones of Cedrus ; and 

 the " Cedrus lotharinyica which Cornuel (1882, p. 262, pi. vii, 

 figs. 2 & 3) describes from the Lower Gault of Houpette (Meuse), 

 Prance, is strikingly similar to the Potomac form." As ho 

 remarks, this French species was later (in 1896) included by 

 Fliche in the species known as Abies oblonga of Lindley & 

 Hutton, and put by the French in the genus Cedrus. As I have 

 already pointed out (p. 145), Fliche's French cones should not 

 be included in this species, but rather in Cedrostrobus LecJcenbi/i 

 (Carr.). It is also doubtful whether CornueFs Cedrus lotha- 

 ringica should be included in the same species as those of 

 Fliche. That it belongs to Cedrostrobus seems clear, but the 

 similarity claimed for it with both the American and the other 

 French species seems overestimated. 



1765 a. Figured, Carruthers, Geol. Mag., 1866, pi. xxi, fig. 3. 

 A slab (9 x 10 cm.) of coarse matrix with shells and 

 the cast of the cone, in which, towards the base 

 only, are a few scales imperfectly preserved, with 

 broken seeds attached to them. Iguanodon Quarry, 

 Lower Greensand ; Maidstone. Mantdl Coll. 



Genus CEDROXYLON, Kraus. 

 [In Schimper's Traite Paleont. Vcget., 1870, p. 370.] 



Diagnosis. That given by Kraus is as follows : " Lignum 

 stratis conceritricis distinctis, rarius obsoletis, latioribus ; ccllu- 

 lis prosenchymatosis porosis, poris magnis, rotundis, uni- vel 

 pluriserialibus oppositis ; cell ul is ductibusque resiuiferis nullis ; 

 radiis medullaribus simplicilms." Kr.-ius continues : " Ce type 

 comprend les bois dont la structure coincide avec celle des bois 

 d 1 Abies et de Cedrus, et exclut tous ceux qui par leurs conduits 

 resinaux se rattachent au genre Pinus proprcment dit." 



Gothan (1905,) devotes a special section to the consideration 

 of Cedroxylon, and its separation from Cupressinovylon, which 

 is not always an easy matter, since the two woods resemble each 

 other very closely in many cases. The older writers used the 



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