I have quite a few of these. I have some ideas, but my knowledge is very limited.
Any IDs would be most appreciated.
The first one seems to be a ferocactus; the last one Echinocactus grusonni. Harry
A: Echinocactus grandis (synonymes: ingens, visnaga, platyacanthus)
H: really Echinocactus gusonii
G. seems like my Tephrocactus geometricus seedlings (it has big opuntia-like seeds in diameter 0,5-1 cm.)
F: left hand side Astrophytum senile or capricorne (too small)
D: Seems like a Parodia
E: maybe Mammillaria spinosissima 'Superred'
others too small for me to identify