1
antennae
2
antennule
3
rostrum
4
eye
5
brain
6
stomach
7
heart
8
pericardial sac
9
ostium
10
testis
11
intestine
12
uropod
13
telson
14
anus
15
swimmeret
16
copulatory swimmeret
17
vas deferens
18
ganglion
19
digestive gland
20
mouth
21
antennal gland