REVISION OF PILARGIDAE — PETTIBONE 181 



Neuropodia conical, with neiiroacicula and simple neurosetae; neuro- 

 setae capillary, smooth and spinous. Ventral cirri shorter, subulate. 

 Pygidium with pau'ed long anal cirri. Proboscis unarmed, cylindrical, 

 with distal circlet of large conical papillae or indistinctly papillate. 

 With intestinal caeca. Integument smooth (not papillated), may be 

 areolated or wrinkled. 



The following species are herein referred to Sigambra: 



S. grubii Miiller, 1858, p. 214. Santa Catharina Island, Brazil. Seepage 182. 



S. robusta (Ehlers, 1908, p. 59), as Ancistrosyllis robusta. South Atlantic 

 Ocean. 



S. constricta (Southern, 1921, p. 573), as Ancistrosyllis constricta. Chilka 

 Lake, India. 



S. tentaculata (Treadwell, 1941, p. 1), as Ancistrosyllis tentaculata. Long 

 Island, N.Y. See page 182. 



S. bassi (Hartman, 1947, p. 501), as Ancistrosyllis bassi. Florida. Seepage 186. 



S. ocellata (Hartmann-Schroder, 1959, p. 109), as Ancistrosyllis ocellata. Cen- 

 tral America. 



S. hanaokai (Kitamori, 1960, p. 1086), as Ancistrosyllis hanaokai. Seto- 

 Inland Sea, Japan. 



S. parva (Day, 1963, p. 395), as Ancistrosyllis parva. South Africa. 



S. wassi, new species. Chesapeake Bay. See page 186. 



Key to the Species of Sigambra 



1. Dorsal cirri only slightly longer than ventral cirri. Dorsal hooked setae 



beginning on setiger 7. Ventral cirri on setiger 2? Very small, young? 



S. ocellata 

 Dorsal cirri longer than ventral cirri 2 



2. Stout hooked notosetae beginning anterior to setiger 20. Ventral cirri lacking 



on setiger 2 3 



Stout hooked notosetae beginning posterior to setiger 20 6 



3. Hooked setae beginning on setiger 4 4 



Hooked setae beginning on about setiger 14 (11-15) . . . S. bassi, p. 186 



4. Median antenna longer than lateral antennae. . . . S. tentaculata, p. 182 

 Antennae subequal 5 



5. Longer neurosetae finely spinous basally, with capillary tips; shorter neuro- 



setae wide, coarsely spinous, tapering to very short bare tips . S. hanaokai 



Longer neurosetae smooth, capillary; shorter neurosetae coarsely spinous, 



with capillary tips S. parva 



6. Body constricted at setiger 4. Without ventral cirri on setiger 2. Notopodial 



hooked setae beginning about setiger 30-40. Dorsal cirri fusiform, tapered. 



S. constricta 

 Body not constricted at setiger 4. With ventral cirri on all setigers ... 7 



7. Dorsal cirri fusiform, tapered. Notopodial hooked setae beginning about 



setiger 70 S. robusta 



Dorsal cirri wide, flattened, leaflike. Notopodial hooked setae beginning 

 about setiger 23-30 S. wassi, p. 186 



Note: S. grubii is omitted from key, since the original description failed to mention 

 on which setiger the hooked setae begin. See page 182. 



