POLYCH^ETA. 319 



crimson cushion and long hair-like setae (Plate VII., figs. 194 and 196). Ten radioles 

 in the left gill ; nine and the operculum in the right. Uncini from last thoracic torus 

 with eleven teeth and a scalprate process (Plate VII., fig. 195). Capillary setae of 

 first thoracic segment not distinguished from the rest ; simple limhate, accompanied 

 by slender non-limbate setae. Mid-abdominal region with dorsal uncini and ventral 

 fascicles containing three geniculate setas. Total length of operculum 5 millims., the 

 style 2'5 millims., the ampulla and columella 2'5 millims. Length of gills 4 millims., 

 of thorax 4 millims., of abdomen 1T5 millims. The terminal filaments of the gill- 

 radioles are clubbed ; in one specimen the clubs have a pinkish colour (Plate VII., 

 fig. 194). The closeness of the intersegmental grooves gives the pygidium a foliate 

 appearance. The tube is coiled horizontally upon itself, widens out in front, and 

 presents 4 or 5 low longitudinal keels. 



EXPLANATION OF THE PLATES. 



PLATE I. 



Fig. 1. Chlceia flam. Dorsal barbed bayonet seta. Zeiss 3 C. 

 2. Ventral furcate seta. Z. 3 C. 



3. Hermione malleata. Dorsal glochideal seta ; the point is broken. Z. 3 C 

 4. Ventral furcate seta showing accessory tooth. Z. 3 0. 



5. Pontogenia indica. Anterior end. 



6. Iphione muricata. Anterior end. 



7. Lepidonotus carinulatus. Prostomium. 



8. Carinulate papillae of elytron arising from clear areoles. 



9. Echinulate papilla. 



10. ,, Stellate papilla. 



11. ,, Ventral seta. Z. 3 C. 



12. Halosydna zeylanica. Parapodium. 

 13. Ventral seta. Z. 3 D. 



14. Harmothoe dictyophora. Elytron ; the superficial filiform papillae occurring on the larger shields 



are omitted. 



15. Harmothoe dictyophora. Head. 

 16. Ventral seta. Z. 3 C. 



17. Hololepidella commeiisalis. Dorsal seta. Z. 3 C. 

 fi 18. Superior ventral seta. Z. 3 C. 



n 19. ,, Inferior ventral seta. Z. 3 C. 



,. 20. Head and proboscis. 



21. Panthalis melanonotux. Head and proboscis. 

 n 22. Fifty-fourth parapodium. a, geniculate appendix; b, dorsal cirrus; 



c, silken threads (tomcntose setse) ; d, notopodium ; e, notopodial acicula ; /, neuropodium ; 



g, neuropodial acicula ; h, ventral cirrus ; i, coil of threads inside the body. 



