NO. 1 hartman: goniadidae, glyceridae, nephtyidae 53 



The first parapodia are the smallest and succeeding ones increase 

 in size gradually. The first one has equally long, triangular dorsal and 

 ventral cirri and a presetal lobe; the postsetal lobe is not developed. The 

 second parapodium resembles the first but is larger. The third one is 

 still larger and has a short postsetal lobe. From the fourth, the post- 

 setal lobe is long, equalling the length of its respective presetal lobe; its 

 dorsal and ventral cirri are larger. Already from the first, the dorsal 

 cirri tend to be slightly incised near the tip, at the lower edge; this 

 character develops noticeably farther back (pi. 8). At segment 26 or 27 

 a small notopodium makes its appearance, near the base of the dorsal 

 cirrus; it is provided with 3 to 5 simple setae. Farther back the noto- 

 podium comes to have a small, presetal, auricular lobe (figs. 2, 3) 

 which may be considered homologous to the presetal lobe of neuropodia. 

 The acicular lobe is blunt and about as long as the larger, slightly ven- 

 tral postsetal lobe. 



Neuropodia are much longer and larger than the corresponding 

 notopodia; the presetal portion is distinctly obcordate (fig. 2) and 

 continues so throughout the body, after the first few segments. At first 

 the presetal lobe is shorter than the triangular, postsetal one, but in the 

 posterior half of the body the former is the longer. Dorsal and ventral 

 cirri are broad, triangular and proportionately longer in anterior seg- 

 ments. The dorsal cirrus is incised near the tip. 



Setae and acicula are yellow. Notosetae include 3 to 5 simple, hooded 

 hooks in each notopodium. Each hook has a strong, cylindrical shaft 

 and ends distally in a slightly recurved, transversely ridged beak that is 

 covered distally by a long, pointed, hyaline hood which is delicately 

 toothed at its free edges (figs. 4, 5). The hood is continuous with the 

 shaft and gradually merges with it. Notoacicula occur singly in noto- 

 podia; they are heavy rods that taper distally to a blunt point; they 

 are usually completely embedded, or the tip may be slightly projecting. 



Neurosetae occur in full, fan-shaped fascicles, supra- and subacicular 

 in position. All are of a single kind but the length of the shaft and 

 appendage varies, the longest occurring in the middle of the fascicles. 

 Neuroacicula occur singly and resemble the corresponding notoacicula 

 except that they are slightly the heavier. Neurosetae have an articulation 

 that is delicately serrated at the outer or long end (figs. 6, 7 and 8). 

 The appendage is long, tapering and has 4 or 5 transverse rows of short 

 teeth (at maximum development). In cross section (fig. 9) it is seen to 

 be widest at the outer or cutting edge. The articulation is seldom seen 

 in lateral view because of the mechanical structure of the blade and 

 juncture (see above). 



