170 DESCRIPTIVE CATALOG UK 



confined to this species, and they occur to a lesser extent in 

 several living and fossil forms of various affinities. For instance, 

 pi. 2 in Penhallow's ' Monograph ' (1907) shows the coalescence 

 of two rings in the living Torrei/a tu.rifoli't. which gives an 

 appearance very like the fossil, though on a smaller scale and 

 more local. In another species, now described for the first 

 time (see p. ISO), from the Isle of Wight, similar - composite " 

 rings are present. Furthermore, Ouprftnmatylen Zfe20cNn6ret, 

 described by Viguier & Fritel (1912), appears to have had 

 "composite" annual rings exactly like those in 0. r 

 and comparison should be made between their tig. 1, p. L 

 and 1*1. XV, fig. 3. The illustration given of the pitting of the 

 ray-cells in <'. l)>'1camhrei is too obscure to show the necessary 

 detail, and, according to the description, they do not coincide 

 with those of C. vnctense. 



The outline drawings of (fcjMVMijMMryfeii M< '/'.>/, Knowlton 

 (1881) A, pi. iii, tig. 3), indicate that in the pitting of the radial 

 walls of the medullary rays t here is considerable likeness 

 between this species and C. vectense of Barber ; Knowlton's 

 description, however, is too meagre to allow a comparison of all 

 the important features in the two plants. Knowlton's plant 

 evidently did not show the " composite rings," for they are not 

 mentioned. Further, Barber's specimens all appear to be parts 

 of small trunks or branches, and Knowlton's is part of a large 

 trunk 40 ft. long and 2 ft. in diameter, so that in any case 

 comparison would be difficult, while in addition Knowlton's 

 specimen is Lowest Cretaceous or Jurassic in age, and is there- 

 fore considerably older than our Aptian species. The pitting of 

 the rays being such an important point, the likeness between 

 the two species is worth noticing. 



Cupre**i*oxylon iwtensc appears to be a well-established 

 species, and is extremely common in the deposits in the neigh- 

 bourhood of Luccomb Chine and Shanklin, Isle of Wight, though 

 no specimen of this wood has so far been recognised in any 

 other part of the British Lower Greensand. 



V. 13193, & V. 13193 a, b, & c. Specimen consisting of a short 

 length of a branch 4x5 cm. in diameter, embedded 

 in coarse granular matrix. The centre of the main 

 axis is preserved, and is surrounded by about 2t> annual 



