are they alive like a grub? if they are narcissus bulbs they could be the larvae of the narcissus bulb fly [Merodon equestris]. I did a blog on these beasties a few years ago. they eat the bulb. the adult looks like a bumble bee. a good mimic. though they do lay eggs on other bulbs such as snowdrops.

Looks like maggots - fly larvae.

Narcissus bulb fly - I would cover my daffs up in the summer on hot days.

They look more like chrysalis. Not grubs, they don't move.

in that case they are the 'shells' of narcissus bulb fly.