Chitin

Chitin is a crafting ingredient normally dropped by Arthropods

Mob drops
Chitin can be obtained as a drop from the following mobs:
 * Arocknid
 * Bloodsucker
 * Bugeye
 * Cave Creep
 * Flye
 * Hive King
 * Meganeuropsis
 * Muckopede
 * Mushroom Spider
 * Paravite
 * Pincher
 * Rock Crawler
 * Rock Critter
 * Shik
 * Tharafly
 * Valkyrie

History
甲壳质