Identifying two BIONICLE parts, white and dark grey curved shell

Question

What are these two BIONICLE pieces?

Answer 1

These are Bionicle parts, specifically the back spine of the 8588-1 Rahkshi Kurahk.

The individual parts are:

• http://brickset.com/parts/design-44140
• http://brickset.com/parts/design-44139

Answer 2

Adding to zovits' answer, you also appear to have a Part 44136 attached to the Part 44139.