POLYCHZT LARVZ. 645 
Larva very large and _ trans- 
parent; in later stages 
notopodia and neuropodia of 
segments 7-11 are decidedly 
longer than those of the 
other segments : Spionid A 
Larva decidedly smaller than 
the last and slightly more 
opaque; segments as long as 
they are broad; (in the latest 
pelagic stages branchiae begin 
to develop at the anterior 
end) : Spionid B. 
larva broad and rather short; 
head produced forwards into 
a very characteristic “snout ” 
which disappears in _ fixed 
specimens; provisional setae 
very stout and _ decidedly 
curved : ) Spionid D. 
