NO. 3 HARTMAN : POLYCHAETOUS ANNELIDS 343 



side, the middle row includes about 6 long ones on a side, alternating with 

 6 or 7 short paleae. There are about 16 pairs of papillae surrounding the 

 outer base of the opercular spines ; they increase in length going ventrally. 

 Abdominal uncini have usually 6 (seldom 5) teeth (pi. 33, fig. 65) in a 

 row, seen from the side. 



S. bella Grube was poorly known until it was re-examined by Augener 

 (1934, p. 151) and the opercular paleae identified (pi. 33, figs. 57-60). 

 The description, however, seems to include one misinterpretation, per- 

 haps caused by the macerated condition of the type. Augener says, in 

 part, "Was die Kronenpaleen betrifft, so waren diese durcheinander 

 gewirrt und die Paleenkrone drohte schon bei leichter Beriihrung ausein- 

 ander zu fallen . . . wahrend es unsicher ist, ob die 2te von mir mit Frag- 

 ezeichen als Innenpalee angesprochene Form der Innenpaleen tatsachlich 

 dem inneren Paleenkreise angehort." I suggest that Augener's fig. 3 Id 

 (herewith pi. 33, fig. 59) is really an inner palea, but that his fig. 31c 

 (herewith pi. Z3, fig. 60) is the alternating long form of the middle 

 series; the short paleae are as in plate 3?>, fig. 58. If this be so, the ar- 

 rangement and form agree very well with the specimens so designated 

 herein. 



Another specimen from Peru (coll. 832-38) differs from the Atlantic 

 form chiefly in that the distal end of the outer paleae (pi. 33, fig. 61) 

 is more closely serrated; the middle (pi. 33, figs. 62, 63) and inner 

 (pi. 2)3, fig. 64) paleae are much like those in the other specimens. 



The form of opercular paleae, especially the alternating long and 

 short ones of the middle series, is reminiscent of the condition in S. 

 alcocki Gravier (1909, p. 298) first described from India. Here, too, the 

 middle opercular paleae alternate long and short, but in the latter the 

 outer paleae are much more prolonged distally and provided with a very 

 long, serrated barb. If this character is highly variable, as seems possible, 

 it may be necessary to refer S. alcocki to the older S. bella Grube. 



The tube consists of thick walls of sand cemented together, forming 

 masses; they are attached to the under sides of stones, shells, and other 

 hard objects. 



Distribution. — Beaufort, North Carolina, south to Desterro [Flori- 

 anopolis], Brazil; PIndependencia Bay, Peru. Intertidal. 



Sabellaria gracilis, new species 

 Plate 34, Figs. 66-72 



Collections.— 90\-3^ (8); 906-38 (1); 1159-40 (many); 1437-41 

 (many) ; La Jolla, California, shore (several). 



