220 МК. C. REID AND ELEANOR M, REID ON 
Unrica Dorca, Linn. (РІ. 14. fig. 132.) 
U. unENs, Linn.? (РІ. 14. fig. 183.) 
These two species are not uncommon; but the sculpture of the nut 
referred to U. wrens differs slightly from our recent specimens. 
ALNUs GLUTINOSA, Gaertn. (Pl. 14. figs. 135, 136.) 
А. sp. (РІ. 14. figs. 137, 138.) 
Cones and seeds of alder are very abundant and generally belong to 
А. glutinosa. At Paketield there appears to be а second species, the seeds of 
which have a narrow somewhat stipitate base, and always differ somewhat 
in colour from the seeds of Alnus glutinosa with which they are mixed. We 
can find no recent alder to correspond with this. The cones are not 
sufficiently well preserved for us to distinguish them. 
SAGITTARIA SAGITTIFOLIA, Linn. (PI. 15. tig. 152.) 
A few carpels have been found, but none are well preserved. 
POTAMOGETON NATANS, Linn. (РІ. 15. fig. 153.) 
P. PERFOLIATUS, Linn. (Pl. 15. fig. 156.) 
P. OBTUSIFOLIUS, Mert. у Koch. (РІ. 15. fig. 159.) 
P. PUSILLUS, Linn, (PI. 15. fig. 160.) 
Fruits of Potamogeton are extremely abundant at nearly all localities ; 
but the species vary from place to place. Thanks to Mr. James Groves we 
have been able to compare our fossils with a good series of recent fruits, and 
now make four additions to the list. Опе species previously recorded 
(P. lucens) must, however, be deleted as a wrong determination. 
CYPERACE,E, 
Many species of Cyperacese are found, but most of them are only 
represented by detached nuts without sete or utricles. We have only 
ventured to determine a few of the best preserved and most characteristic 
forms. 
A few plants previously recorded are not included in the above list and 
notes, and have been omitted till thev can be verified. "The determinations 
may have been right ; but in some cases the seeds have suffered so much, 
from gradual decay of the pyrites, that we cannot now say whether they were 
right or wrong. In other cases we await more material before authenticating 
the determination. Pinus montana, for instance, has been recorded by 
Heer and Saporta ; but we can. find no cones belonging to this pine, though 
we have examined a large amount of material. Possibly the cones came from 
а later deposit, with Aretie plants, which overlies the Cromer Forest-bed, and 
is not included within the scope of this paper. 
