NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 45 



body is strongly arched in the middle. Greatest width at the sixteenth 

 segment is 9 mm between the nephridial papillae, and 16.2 mm including 

 the setae. 



The prostomium is largely hidden between the first pair of para- 

 podia, and by a broad, fleshy, convex lobe projecting forward over its 

 posterior half. The lateral antennae are inserted terminally, the styles 

 long, slender, but not extending distally as far as the median antenna. 

 Median ceratophore is long, cylindrical; its distal end projects beyond 

 that of the lateral antennae, its style similar in shape to that of the 

 lateral antennae, but a little longer. Eyes 4, dark, disposed on the pos- 

 terior half of the prostomium, the anterior pair at the sides of the widest 

 part of the prostomium, the posterior pair near the postectal margin. 

 Palpi are long, stout, exceeding in length the antennae and dorsal cirri. 

 They have a few longitudinal rows of minute papillae on the dorsal side. 



The elytra completely cover the dorsum. They are firmly attached, 

 deeply imbricated, and overlap those of the opposite side. Each has a 

 conspicuous marginal fringe, and an elongate tuft at the inner ectal 

 margin (pi. 6, figs. 70-72). The fringes are in most instances over- 

 grown so as to appear much thicker than they actually are. The surface 

 is richly covered with high, broad-headed tubercles on the exposed por- 

 tion, and smaller, conical or somewhat curved tubercles and knobbed 

 prominences on other portions. A few scattered hairs, resembling the 

 marginal fringe, but shorter, are scattered among the tubercles, espe- 

 cially on the exposed parts of the elytra. The tall, large headed tubercles 

 have their terminal disks excavate in the middle (pi. 6, figs. 73, 74), 

 and the entire cap is covered with numerous slender spines. The stalk 

 from which the tall tubercle arises is smooth and expands at its base. 

 A smaller individual from the same locality (Bahia Honda) has only 

 a few of the conspicuous macrotubercles. 



Parapodia are subbiramous, the notopodium papillar, arising from 

 the dorsal side of the neuropodium. Each has a stout, dark amber 

 aciculum and numerous (about 20 or more) slender, spinose setae, 

 most of them overgrown, but a few showing the well developed trans- 

 verse rows of spinulae. A few (1 to 3) of the dorsalmost notopodial 

 setae are shorter and blunter (pi. 6, fig. 76) ; most of the others have a 

 similar basal portion, but are greatly elongate distally, with an attenuate 

 tip. 



The neuropodium is stout, deep, subtruncate, the acicular and post- 

 acicular lobes not notably different from one another. About 30 to 40 



