Figure 30-19. Distribution of Sphaerosyllis aciculata on the outer continental shelf of the northern Gulf of Mexico 

 based on its occurrence ( • ) in BLM-OCS monitoring programs. 



Figure 30-20. Sphaerosyllis aciculata : a, anterior end; b, superior simple seta from posterior region; c, inferior 



falciger from anterior region; d, ankylose seta from posterior region; e, inferior simple seta; f, acicuU 

 from posterior region; scale same for b-f. 



30-26 



