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U.S. NATIONAL MUSEUM BULLETIN 227 



Figure 37. — Syllidae, a-b, Autolytus fasciatus, male stolon or polybostrichus stage: a, dorsal 

 view anterior end; h, ventral view anterior end. c, Autolytus emertoni, neurosetae. 

 d, Autolytus prismaticus, dorsal view anterior end. e, Autolytus cornutus, portion of body 

 showing dorsolateral banding, f-g, Autolytus alexa7idri {a.hev Moore, MS.):/, compound 

 seta from setiger 10; g, simple seta from same. 



dorsal cirri, narrower, darker, may be confined to anterior fom-th or 

 half of the body; tips of antennae, tentacular cirri, dorsal cirri, and 

 epaulettes may be rusty brown. 



Female stolon with 6 prenatatory, 18-31 natatory, 15-50 post- 

 natatory setigers; nuchal epaulettes extending on first setiger; anterior 

 region, at least, with same pigmented pattern as in stem form, three 



