PLATE LXXI. 



Fig. 



1. Foot of Amblyosyllis lineata, A. Costa. The process above the setigerous region is 



often more pointed, and the cirrus has its basal region directed dorsally. X 55. 



2. Foot of Autolytus pictus, Ehlers. X about 55. 



3. Foot of Autolytus aurantiacus, Claparede, viewed obliquely from above. X about 55. 



4. Foot of female bud of Autolytus prolifer, 0. F. Miiller. X about 55. 



5. Foot of nurse-stock of Myrianida pinnigera, Mont. X about 55. 



6. Foot of female bud of the same with developing swimming bristles. X about 55. 



7. First foot of Nereis pelagica, L. X 15. 

 7 a. Tenth right foot of the same. X 15. 



7 b. Thirty-seventh right foot of the foregoing. X 15. 



7 c. Fifty-seventh foot (right). X 15. 



7 d. First foot of a large epitokous male from the West Sands, St. Andrews. X 



about 12. 

 7 /. Thirty-seventh foot of epitokous form. X 12. 

 7 g. Fifty-seventh foot of the foregoing. X 12. 

 7 h. Eightieth foot of the same. X 12. 



7 i. Twenty-eighth foot of a young example of Nereis pelagica from St. Andrews with 



clavate parasitic growth. Viewed from the dorsum. X 90. 



8. First foot of Nereis cultrifera, Grube. X 15. 



8 a. Tenth foot of the same. X 15. 



8 b. Thirty- seventh foot of this species. X 15. 



8 c. Fifth foot from tip of tail. X 15. 



8 d. Nineteenth foot of epitokous male. X 15. 



