| Answer | Crossword Clue |
|---|---|
| cuticula | the outer hard covering of an insect |
| cuticulae | CUTICULA, the outer hard covering of an insect |
| shells | The thin outer covering of an animal's egg, which is hard and fragile in that of a bird but leathery in that of a reptile |
| pronotum | a hard outer plate of an insect |
| pronota | PRONOTUM, a hard outer plate of an insect |
| shell | hard outer covering of an animal or a seed, egg, nut, etc. |
