REVISION OF PILARGIDAE — PETTIBONE 



203 



slightly bidentate; middle and upper setae more slender, enlarged 

 basal parts with few heavier spinous rows and low ridges, with ter- 

 minal whiplike tips. 



Parapodial glandular structures present, containing large cells 

 and giving off material having appearance of long cilia when pre- 

 served (fig. 25a): (1), large stalked papillae posterior to bases of ven- 



FiGURE 26. — Podarmus ploa: a, middle parapodium of cirri gerous segment, ventral view 

 (tips of neurosetae not shown); b, same, dorsal view, style of dorsal cirrus missing (acicula 

 indicated); c, upper neuroseta; d, lower neurosetae. 



tral cirri, beginning on setiger 4-5 and continuing posteriorly ( = 

 cylindrical processes, Chamberlin; =clavate processes or enlarged 

 genito-nephridial papillae, Monro; =stalked ciliated papillae, Berke- 

 ley); (2) smaller oval papillae on ventral basal parts of parapodia on 



