PLATE CXI. 



Fig. 

 1. Dorsal view of Prionospio Malmgreni, Claparede, from a specimen of fifty-six segments 



forwarded by Mr. Southern. Enlarged under a lens. 

 1 a. Anterior region further enlarged. To this and the previous figure the tentacles have 



been added from the figure of Gr. 0. Sars. 

 1 b. Lateral view of the same region to indicate the proportionally long branchiae. 



Enlarged. 

 1 v. Anterior foot. x oc. 4, obj. A, with draw-tube. 

 3. Anterior region of Cirratulas caudatus, Levinsen, from Dunmanus Bay. The 



specimen is incomplete. Enlarged. 



5. Anterior region of OsesicArrus neglectus, Arwidsson, from the dorsum. Enlarged. 

 5 a. Lateral view of the snout of the same. Enlarged. 



5 b. Lateral view of the posterior end. Enlarged. 



5 c. Anal disc seen from the rear. Enlarged. 



5 d. Feathered capillary bristle from the seventeenth segment of the foregoing. X 



670 diam. 

 be. Hook of the same. X 530. (All from Arwidsson's memoir.) 



6. Cephalic plate of Pseudoclymene quadrilobata, Sars, from the Outer Skerries, Shetland. 



Enlarged. 

 7. 1 Anterior region of an imperfect example of Myriochele Heeri (?) from Canada. 

 Enlarged. 



7 a. 1 Anterior region of Myriochele Heeri, Malmgren, from Clew Bay, Ireland ; completed 



with the aid of Malmgren's figure. Enlarged. 



8. Anterior region of Maldane Sarsi, Malmgren. Enlarged. 



8 a. Posterior end with anal projection. Enlarged. 



9. Anterior end of Heterocirrvs viridis, Langerhans, from a specimen mounted by Major 



Elwes. Enlarged. 



9 a. Bristle of the foregoing. x oc. 4, obj. D, with draw-tube. 



10. Hook of Heterocirrus caput-esocis, De St. Joseph, from a specimen sent by Major 



Elwes. X oc. 4, obj. D, with draw-tube. 



11. Simple bristle of the first foot of Poecilochdstus serpens, Allen. X oc. 4, obj. D. 

 11 a. Second foot of the foregoing. X 40 diam. ? 



11 b. Posterior hooks from the dorsal division. After Dr. Allen. X 100. 

 11 c. Broadly feathered bristle, x oc. 4, obj. D. 

 11 d. More slender form of the same kind. X oc. 2, obj. D. 



lie. Peculiar soft spinuous ("membranous") form from the anterior third (about 

 twentieth foot), x oc. 2, obj. D. 



1 By an error the figure is numbered 2 in the plate. 



