( 33 ) 
ftantly turns its face from the wind, 
and then {hews its naked white neck 
behind, like that of a nodding Man- 
darine on the chimney-piece. Four 
fpecies of Thirties you will fee, in 
great abundance, in the road to 
Trumpington, viz. The Onopordum 
acanthium, or Cotton Thiftle; Carduus 
lanceolatus, or Spear Thiftle ; Serratula 
arvenfis, or Curfed Thiftle; and the 
Carduus crifpus, or Curled Thiftle. 
The firft you diftinguifh immedi- 
ately by its mealy appearance. The 
fecond by its dark, the third by its 
light green colour, and the laft by a 
fhade between the two. 
No. 17. This is the Daucus carota. 
No. 1 8. And this, Paftinacafyfaejlris, both 
which we have before examined. Thefe are 
all you have gathered. You have overlooked 
a few ; but I fuppofe your box would hold 
no more. 
Vale, 
LET- 
