Related Clues:
- Immature form of an insect
- Collar vagabond concealed by immature crawler
- Looking back, central to travel by rail without one immature crawler
- Future imago
- Tadpole or caterpillar, say
- Polliwog, for one
- eg Caterpillar
- Grub, caterpillar
- Immature life form
- Grub that was found right inside volcanic rock
- Grub available in spectacular variety
- Caterpillar perhaps showing some cellular variation
- E.g. a caterpillar
- Form of insect right inside rock
- Early life form originally revealed in soft rock