20 GYMNOSPERMATOUS FRUITS FROM SECONDARY ROCKS. 
bases (fig. 15). The larger leaves scarcely differ from those of a 
variety of Sequoia sempervirens, Endl., iu the herbarium of the British 
Museum, that was collected by Bridges in California in 1846; they 
are also similarly arranged on the branch, being scattered around the 
axis, and having an upward direction and a subfaleate form. The 
nerve below is broad, and bounded by two furrows similar to those in 
the recent species which bear the rows of stomata (fig. 10). The 
apex of the fertile branch (fig. 13, double the natural size) is crowded 
with erect sessile ovules, each showing the opening through the testa at 
the apex (fig. 14). The scales have been broken oif, but the scars 
can be detected. The cone is about two-thirds the size of those on 
the recent specimen to which I have referred. The vertical rank con- 
sists of six scales. In form and arrangement they exactly agree with 
S. sempervirens, Endl. There are no remains of the seeds. 
The specimens are from the Upper Greensand of Blackdown, Dorset- 
shire. 
Hugh Miller found dot ached Coniferous cones in the Oolite at Helms- 
dale, Sutherland, and a "cone with long bracts likeP^ bracteata" in 
the Lias of Cromarty. Cycadean remains have also been found in the 
same beds, but I have not been able to examine the specimens, and 
they have not been described. 
I have omitted in this paper the cones of the Trias, as I am little 
acquainted with the fossils of that period. 
Explanation op Plates LVII.-LX. , 
*** I am indebted to my colleague, Mr. H. Woodward, for the use of 
Plates LVIIL, LIX., and LX., which have already appeared in his ■ Geological 
Magazine, 1 along with the descriptions of the species figured on them. 
Plate LVIL— Fig. 1. Cycadoostrobus ovatus. Kg, 2. Longitudinal section 
of ditto. Fig. 3. C. truncatu*. Fig. 4. C. Brunoni*. Fig. 5. Portion of a 
longitudinal sect ion* of ditto (double the natural size). Fig. 6. C. tumidus. 
Fig. 7. Four scales of a water-worn cone, showing the bases of the two seeds 
under each scale. Fig. 8. C. sphcerica. Fig. 9. Q. elegant. 
Plate LVIIL— Fig. 1. Cone of Finite* macrocephalus, with the apophyses 
of some scales restored (slightly reduced). From Mr. Dowker's collection. 
Fig. 2. Diagram of transverse section of ditto from the Bowerbank specimen! 
Fig. 3. Base of a cone of J>. ovatus. Fig. 4. Transverse section of ditto. 
Fig. 5. Cone of P. Sussex iensis. Fig. 6. Transverse section of ditto. 
Plate LIX.— Fig. 1. Part of an unopened cone of Finite* Dunleri. 
Fig. 2. Part of an open cone of ditto. Fig. 3. Cone of P. Mantellii. Fig. 4 . 
Cone of P. paten*. Fig. 5. Longitudinal section of P. macrocephalus, from 
Robert Brown's collection. Fig. 6. Restored scale of ditto. Fig. 7. Scale of 
P. 8 uexiensi*. Fig. 8. Longitudinal section of Pinm Pinaster. Fig. 9. 
Scale of Zamia Yatesii, seen from above. Fig. 10. Ditto, seen from the side. 
