53 i 
Dull. — Pity os tr obits macrocephalus , L. and H. 
specimens, apparently identical with Zamia macrocephala , L. and H., 
Carruthers was enabled to give a more accurate description and to correct 
an error regarding the geological age of the fossil. Henslow, deceived by 
the appearance of the sandstone in which his specimen was embedded, had 
referred the fossil to the ‘ Greensand Formation * ; but Carruthers was able 
to fix the horizon as Eocene, for two of the three other specimens available 
to him were found in situ in a similar sandstone of this age. Of these two, 
one is in the Bowerbank Collection and comes from Sheppey, the other is a 
fossil which was found by Mr. Dowker near Canterbury, at about the junc- 
tion of the Woolwich and Thanet beds. The third specimen, a water-worn 
fossil of unknown locality, belonging to the Cowderoy Collection, furnished 
the slides of Pinites macrocephalus , Carr., used in the following description. 
Since then several other specimens have come to light ; Mr. Edgell’s speci- 
men of P. macrocephalus , in the Sedgwick Museum, was obtained from the 
London Clay at Reculvers, Kent. 
A cone similar to Zamia macrocephala , L. and H., though somewhat 
smaller, which was found on the Kent coast near Faversham, was described 
by Lindley and Hutton ( 7 , vol. iii, p. 189, PI. 226 A) in the Fossil Flora 
under the name of Zamia ovata . Owing to its resemblance to Zamia 
macrocephala they referred it also to the Greensand. This fossil has 
accompanied the other in all its vicissitudes of generic terminology and 
was also placed by Carruthers in the genus Phiites. He considered it, 
too, to be of Tertiary age, both on account of its resemblance to P . ma- 
crocephalus and on account of the locality from which it was derived. 
The place of origin of the specimen of P. ovata in the Cowderoy Col- 
lection is also unknown. 
Since the work of Carruthers little has been added to our knowledge of 
these cones. Mr. Starkie Gardner ( 5 ) in his Monograph of the British Eocene 
Flora in 1886 includes both cones in the recent genus Pinus , preferring to 
retain the name Pinites for coniferous remains from the Secondary rocks. 
Except that he regards P. ovata as only ‘ possibly a distinct species * he 
introduces practically no change into Carruthers’ description. 
General Description. 
The shape of the cone can be seen from the longitudinal section 
of Pityostrobus macrocephalus (Fig. 2, PI. XV). It is broadly ovoid- 
cylindrical and obtuse at both ends. This section, 9-3 cm. in length 
by nearly 5 cm. in breadth, has been prepared from a considerably water- 
worn specimen ; the occurrence of part of a large seed at the very base makes 
it probable that the cone from which it was cut was incomplete. The 
cone from the Sedgwick Museum is about the same length though slightly 
broader, and certainly represents only the uppermost part of a much larger 
