PLATE LXXIII. 



Fig. 



1. First foot of Eunereis longissima, Johns t. X 15. 

 la. Tenth foot. X 15. 



1 b. Sixty-sixth foot of an example (var.) from the Bay of Tunis. Enlarged. 

 1 c. Sixty-seventh foot of an epitokous female. X 18. 



1 d. Foot of the foregoing near the tip of the tail. X 15. 



2. First foot of Alitta virens, Sars. X 13. 



2 a. Tenth foot (right). X 12. 



2 b. Thirty-seventh foot. X about 12. 



3. First foot of Nereilepas fucata, Sav. X about 15. 



3 a. Tenth foot. X about 15. 



3 b. Twenty-seventh foot of epitokous female. X 12. 



3 c. Fifty-seventh foot of the foregoing. X 12. 



4. Foot of Staurocephalus rubrovittatus, Grube, from the middle of the body. X 60. 



4 a, Foot of a young pelagic form of the same, caught in tow-net off Sark by Mrs. 



Collings. X 60. 



5. Typical foot of Staurocephalus Kefersteini, Mel. x Zeiss oc. 2, obj. D. 



6. Twentieth foot of Staurocephalus ciliatus, Kef., var Robertianse, from St. Peter Port, 



Guernsey. X 65. 



7. Foot of Ophryotrocha puerilis, Clap, and Mecz. X 100. 



8. First foot of Lumbriconereis fragilis, 0. F. Mull. X 25. 

 8 a. Tenth foot of variety of the foregoing. X 25. 



8 b. Fiftieth foot from a specimen dredged off Sark by Col. Fraser and Capt. Powell. 

 X 25. 



8 c. Foot (sixtieth) from the posterior region. X 25. 



9. Tenth foot of Lumbriconereis Latreillii, Aud. and Edw., from Bantry Bay. X 55. 



9 a. Foot (about fifteenth) of the same. X 55. 



10. Tenth foot ? of Lumbriconereis impatiens, Clap., from Plymouth. The long hooks 



have been omitted. X 55. 

 10 a. One hundredth foot of the foregoing form. The long hooks have been omitted. 



x 55. 

 10 b. Fifty-seventh foot of a specimen from the ' Knight Errant.' x 55. 



