THE PRE-GLACIAL FLORA OF BRITAIN. 217 
CARDUUS, cf. NUTANS, Linn. (РІ. 18. fig. 90.) 
Fruits like C. nutans, but with finer sculpture and without longitudinal 
ribs. We find this species occurring also in a deposit of slightly older date 
at Tegelen in the Netherlands. The Pakefield seeds vary considerably in 
size, the one figured is large. 
Our series of recent fruits of Carduus is still very imperfect, and in 
herbarium specimens the fruits are seldom ripe. The fossil may belong to 
some well-known continental plant. 
CaRDUUS PALUSTRIS, Linn. (PI. 18. fig. 91.) 
A few fruits have been found at Pakefield. 
CARDUUS LANCEOLATUs, Willd. ? 
This species has been recorded with doubt (“Origin of the British Flora”) 
but the specimen was badly preserved and we can find no others. 
CARDUUS HETEROPHYLLUs, Linn.? (Pl. 18. fig. 92.) 
The coarse rugose sculpture of the fruit figured corresponds so closely with 
that of C. heterophyllus, that we must refer our fossil to that species. We 
have only one specimen, and this is the only plant at Pakefield that suggests 
northern rather than southern latitudes. 
CENTAUREA sp. (Pl. 13. figs. 93, 94.) 
Two fruits of Centaurea have been found at Pakefield, probably repre- 
senting two species. The fruit shown in fig. 94 corresponds with C. Caleitrapa, 
and with no other British form. But there are so many European species of 
this genus the fruits of which we have yet been unable to examine, that we 
hesitate to refer our fossil to a species belonging so markedly to dry soils. 
CREPIS SUCCISAFOLIA, Tausch. (РІ. 18. fig. 96.) 
Not uncommon at Pakefield. 
LEONTODON AUTUMNALIS, Linn, (Pl. 18. fig. 97.) 
Occurs rarely at Pakefield. 
VknbBAsCUM THApsus, Linn. (РІ. 14. fig. 102.) 
A single seed has been found at Pakefield. The species in this genus 
are readily distinguished by their seeds. 
LIMOSELLA AQUATICA, Linn. (PI. 14. fig. 103.) 
Only one specimen has been found ; but the seed is so small that it may 
easily be overlooked, or lost in washing the clay. 
