EXPLANATION OF PLATE V A. 
Palaeopalaemon iowensis Walter. 
Figure 1. Diagrammatic sketch; left lateral view, enlarged. 
a proximal part of antennule 
es eye stalk 
gd gastro-dorsal sulcus 
hs hepatic sulcus 
ts transverse gastric sulcus 
cr cervical ridge 
x part of pleura (?) or telson (?) 
gs gastro-hepatic sulcus 
m thickened margin of carapace 
sg sub-marginal groove 
sc marginal carina 
Ic cardiaco-branchial carina 
as antennal scale 
rm first joint of right first pereiopod 
Im first joint of left first pereiopod 
ta thoracic appendages 
rs rostral spine 
Figure 2. Right lateral view, natural size. 
Figure 3. Left lateral view, times ten-sevenths natural size. 
Figure 4. Dorsal view; about ten-sevenths natural size. 
