OF LOWER OREENSAND PLANTS. 157 



V. 13197 a. Transverse section of the type-specimen showing 

 all the described details. The cells are considerably 

 blurred by the opaque nature of the petrifying medium. 



V. 13197 b. Figured, text-fig. 44. .Radial section of the above, 

 in which the abietinean thickening and pitting of 

 several of the ray-cells can be well seen. 



V. 13197 C. Tangential section of the above, in which the height 



of the rays can be seen. 

 Lower Greensand ; Potton. 



Presented by tlie Sedgwick Mwseiim, Cambridge, 1915. 



V. 13196 a-C< Transverse, radial, and tangential sections of the 

 second specimen in the Sedgwiclc Museum, Cambridge, 

 which is rather doubtfully included in the same 

 species as the above. The transverse section shows 

 the pith and primary wood fairly well, but the longi- 

 tudinal sections are very poor. Lower Greensand ; 

 I'otton, 

 Presented by the Sedyivick Museum, Cambridge, 1915. 



Genus ABIETITES, Hisinger. 

 [Lethoea suecica, 1837, p. 110.] 



This generic name may be used in the sense in which Pinites 

 has long been employed in relation to foliage. It covers a wider 

 range, however, and includes doubtful Gymnosperms from rocks 

 of many ages. 



Endlicher's generic name Pinites, used in this sense by 

 Gardner, Seward, and other writers, is antedated by Witham's 

 Pinites, which was diagnosed in quite another sense ; and in any 

 case the suggestion of the name I'inites is narrower and more 

 definite than is often warranted by the specimens for which it 

 is employed. 1 therefore follow Berry (1911, p. 403) in re- 

 verting to the older name. 



Abietites cf. Solmsi (Seward). 



1895. Pinites Solmsi, Seward, Cat. Wealden Flora, vol. 2, p. 196, 

 pi. xviii, figs. 2 & 3, pi. xix. 



Diagnosis. That given by Seward is as follows : " Short 



