NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 71 



The tubes are soft, limpid, dark gray, with a thin parchmentlike base 

 and are more or less thickly covered with fine sand and mud particles in- 

 corporated in a mucous base; they appear somewhat ragged to nearly 

 smooth, and are usually tapered somewhat toward each end. The tubes 

 adhere rather closely to the occupant, when preserved. 



Distribution. — O. parva has heretofore been known only through its 

 original account, but was then reported from Monterey south to Santa 

 Cruz light, in 49-184 fms. The present collections originate from south- 

 ern California, south to Cedros Island, Lower California, in depths of 

 26-83 fms. 



Onuphis zebra Berkeley 

 Plate 3, Figs. 55-60 



Berkeley, 1939, pp. 337-338, figs. 9-10. 



Collection.— 769-3S (1). 



There is a single anterior end of 46 setigers, referred to this species 

 because of its unique, greatly prolonged anterior parapodia through the 

 first 5 setigers. The upper surface of about the first 25 segments is crossed 

 by bold, broad transverse, reddish-brown pigment bands; thereafter the 

 pigment gradually fades and comes to be limited to one median and a 

 pair of lateral spots over the parapodial bases. The ceratophores of the 

 occipital tentacles are boldly ringed with a similar pigment, and the 

 styles are marked with narrow, irregularly transverse bands of the same 

 color; the prostomium has similar diffuse pigment as also the frontal an- 

 tennae; these are weakly annulate. 



The first 6 pairs of parapodia greatly exxeed the others, the longest 

 occur between setigers 2 and 5 (pi. 3, fig. 57), and thereafter they di- 

 minish in length. Dorsal cirri are very long and slender, through the sec- 

 ond to sixth setiger but diminish in length after the seventh ; the first is 

 only about as long as that of the eighth setiger. Ventral cirri are long, 

 slender, cirriform through 7 setigers, the eighth and ninth successively 

 less so and already thick at the base; by the tenth only a thick padlike 

 base is present. 



Branchiae are present abruptly from the sixth setiger, with 3 fila- 

 ments in pectinate arrangement, but are greatly exceeded in length by 

 the long dorsal cirri. The number of filaments increases rapidly, so that 

 there are 4 filaments on the seventh and eighth setigers, 5 on the ninth 

 to eleventh, 6 on the twelfth, increasing to 9 on about the thirty-sixth 

 (pi. 3, fig. 56). 



