2G8 Notes from the Gatty Marine Lahoratori/. 



the shovter forms are sinootli. The barred bristles (PI. VIII. 

 fig. 11) offer no diagMOstic feature. 



The specimen seems to agree with the description given 

 bj Prof. Ehlers of tiie head and anterior end of Neplithys 

 hucera, but llie structure of the foot diverges, since he states 

 that the dorsal lamella has its long diameter perpendicular to 

 the foot (forming an oval membranous plate), whereas the 

 long diameter here is horizontal. Moreover, the capillary 

 bristles have the larger spikes at the flattened region beyond 

 the shaft characteristic of N. picta, though they are not so 

 pronounced as in Ehlers's figure. The dorsal lamella of the 

 latter (foot) would appear to be scarcely so long as the division 

 and uniformly rounded. Tiie dorsal cirrus in the Canadian 

 form lias a flat enlargement at its base superiorly. Unfortu- 

 nately pjhlers gives no figure of the foot, so that some doubt 

 remains. 



EXPLANATION OF THE PLATES. 



Plate VII. 



Fi'f/. 1, Typical foot oi Nephthys canadensis, with peculiar parasitic bodies 



attached. Enlarg-ed. 

 Fig. 2. Foot of Ncphthi/s lawrencii. Enlarged. 

 Fiff. 3. Head and unteriov segment o{ Nej)hthi/s jncta, Ehlers, from tlia 



dorsiua. Enlarged. 

 Fiff. 4. Ventral aspect of the same reg-ion. Enlarged. 

 Ftff. 5. Foot of the same species. Enlarged. 

 Fiff. 6. Partly extruded proboscis of Neplithys (^Aglaophanus) inermis, 



Ehlers. Enlarged. 

 Fig. 7. Foot (about the 90th) of the foregoing. Enlarged. 

 Fig. 8, Proboscis of Nephthys picta. Enlarged. 



Plate VIII. 



Fig. 1. Barred or camerated bristle of Nephthys {Aglaophanus) inermis, 



Ehlers. Magnified. 

 Fig. 2. Lyrate bristle of the same species. Magnified. 

 Fig. 3. Simple bristle of tlie same form. Magnified. 

 Fig. 4. Barred bristle of Nephthys canadeyisis, sp. u. Magnified. 

 Figs. 5, 6. Simple serrated bristles of the foregoing. Magnified. 

 Fig. 7. Bavved hriatle of Nephthys tatvrencii, s\:). n. Magnified. 

 Fig. 8. Simple finely serrated bristle of the same. Magnified. 

 Fig. 9. Serrated bristle of Nephthys picta, Ehlers. 

 Fig. 10. Inferior region of the blade of the foregoing, more highly 



magnified. 

 Fig. 11. Barred bristle of the same species. Magnified. 



