268 Notes from the Gatty Marine Laboratory, 



tlie shorter forms are smooth. The barred bristles (PI. VIII. 

 fig. 11) offer no diagiiostie t'eature. 



The specimen seems to agree with the description given 

 by Prof. Ehlers of the liead and anterior end of Nephthys 

 bucera, but the 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 tlutteued region beyond 

 the shaft characteristic of N. picta, tliougli 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 unitbrmly rounded. The dorsal cirrus in tlie Canadian 

 form has a ilat enlargement at its base superiorly. Unfortu- 

 nately Ehlei's gives ]io figure of the foot, so that some doubt 

 remains. 



EXPLANATION OF THE PLATES. 



Plate VII. 



Fi;/. 1. Typical foot of Xephthi/s canadensis, with peculiar parasitic bodies 



attached. Enlarped. 

 Fi(/, 2. Foot of Nephthys knorencii. Enlarged. 

 Fig. 3. Head and anterior segment of Nephthys jncta, Ehlers, from the 



dorsum. Enlarged. 

 Fiff. 4. Ventral aspect of the same region. Enlarged. 

 Fit/. 5. Foot of the same species. Enlarged. 

 Fiff. 6. Partly extruded proboscis of Xejjhthys (Aglaophamis) inermis, 



Ehlers. Enlarged. 

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

 Fig. 8, Proboscis of Nej)hthys pida. Enlarged. 



Plate VIII. 



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



Ehlers. Magnified. 

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

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

 Fig. 4, Harred bristle of Nephthys cana(/e7isis, ^Tp. n. Magnified. 

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

 Fig. 7. Barred hristle of Nephthys hticreyicii, a^. 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. 



