COMPLETE HARTMAN: POLYCHAETES FROM CALIFORNIA 123 



P. capensis (Mcintosh) 1885, new comb., from South Africa. (Earlier 



as Semiodera) . 

 P. roberti (Hartman) 1951, new comb., from the Gulf of Mexico. See 



PL 28, figs. 1-4. (Earlier as Semiodera). 

 P. gracilis, new species. See below. 



Stylarioides bifidus Fauvel, 1932, from the Arabian Sea, departs from 

 the species named above in that it has paired, instead of a single, prolonged 

 oral process. 



Piromis americana (Monro) 1928, new combination 



Stylarioides capensis americana Monro, 1928, pp. 96-97, fig. 16. 



Collection. Half Moon Bay, San Mateo County, California, in 18 

 fms, rocky bottom. 



This species measures about 90 mm long and 6 mm wide. The 

 epithelium is thickly encrusted with sand. The palpi are longer than the 

 prolonged tentacular base. Setae of the first 3 segments form a cephalic 

 cage and are directed forward. Neuropodial hooks are distally falcigerous 

 and entire. 



It is known from tropical waters of the eastern Pacific Ocean (Monro, 

 1928) and central California, in shallow ocean bottoms. 



Piromis gracilis, new species 

 Plate 29, figs. 1-4, plate 30, figs. 1-9 



Collections. Velero III Stations 216-34 (1), 767-38 (1), 930-39, (3). 



A complete specimen measures 230 mm long and consists of 106 seg- 

 ments. The surface papillae are long and filamentous in the region about 

 the parapodia (PI. 29, figs. 3, 4). Similar papillae occur in irregular 

 longitudinal rows on the dorsal and ventral surfaces. In anterior seg- 

 ments the space between parapodial rami is largely without papillae 

 ( PL 29, fig. 1 ) ; in median and posterior segments the surface is lightly 

 papillated or coated with small granules. 



Setae of the first 4 segments are longer than others and directed 

 forward to form a cage. They are cross-barred, as is typical of other 

 species of the genus. From the fifth segment the setae are gradually 

 shorter but still slender and similarly cross-barred. Thick falcigerous 

 setae are present only in postmedian segments. 



The oral apparatus consists of a pair of thick palpi and a broad, 

 tonguelike membrane with more than 80 digitate tentacles. They are 



