Fig. 25. Planktonic stages of polychaete worms. 



1. AiitohitHs prolifer, with eggs. 



2. Hariiuithoe imhricata (a) mctatrochophore, {b) nectochactc stage. 



3. Phyllodoce groenlaiidicii, old tvochophoTC. 



4. Phyllodoce macnlata, old larva. 



5. Nereis pela^ica, nectochactc stage. 



6. Nepthys dliata {a) young trochophorc, (/;) and (f) nictatrochophores. 



7. Polydora coeca, old larva. 



8. Py^ospio elegaus, old larva. 



continued opposite 



