ABT. 2 THREE NEW POLYCHAETOUS ANNELIDS TEEADWELL 5 



At the dorsal end of the setal row in abdominal somites is i tiitt 

 of setae, as shown in Figure 3, a. Each has a heavy stalk, the inner 

 end terminating bluntly, the outer end asymmetrically widened and 

 concavo-convex in form, its margin denticulated. Fine lines extend 

 down over the stalk from these denticulations. The first seta tuft 

 (which lies in the dorsal collar lobe) contains two rows of setae with 

 six or seven in a row. The first are slender, long, and sharp pointed 

 and lie across the others at an angle of about 45°. The basal part of 

 the second kind is much heavier, having four or five times the 

 diameter of the slender ones. Near the apex their stalk divider into 

 three spines, one of which is long, slender, and sharp-pointed, the 

 other two short and conical. (Fig. 3, h.) In the rest of the thoracic 

 somites the dorsal setae are moderately stout, curved, and sharp- 

 pointed and have a fin along the convex margin. (Fig. 3, o.) The 

 uncini are similar throughout the body, each (fig. 3, d) having a 

 rounded base and six teeth, which decrease gradually in size from the 

 basal to the terminal of the series. 



A fragment of the limestone tube remains attached to the hoLotype. 

 This is heavy and has marked longitudinal ridges. 



Hoioiype—JJ.S.l^M. No. 19621, collected at Grand Isle, La 



0. f . •STHimeHT raiiTiia atrtcti tMi 



