33 Phorcus lineatus

33 Phorcus lineatus

Mantle cut and opened out..
1: ctenidium (gill).
2: ctenidium enlarged.
3: lamellae of ctenidium enlarged.
4: skeleton of ctenidium.
5: efferent branchial vessel.
6: radular sac.
7: intestine.
8: heart.
9: right kidney.
10: digestive gland (mostly concealed by 11).
11: gonads.
12: rectum.