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ferior pair, those of each pair so joined as to form, apparently, a 

 single jaw, denticulated along its margins, with two strong teeth 

 in front ; these jaws move vertically upon each other, as in verte- 

 brates. The first pair of feet bears scales ; the second pair, cirri ; 

 the third and fourth pairs, scales ; after which the feet through- 

 out the body bear, alternately, cirri and scales. The cirri are 

 short, thick, and pointed. The scales are so small as to leave 

 the middle of the back, one third of its width, bare ; they over- 

 lap each other slightly, in the same direction as in the genus 

 Lepidonote, and not as in A. Pleei. Both the cirrigerous and 

 squamiferous pinnse have one or more additional tubercular or 

 cirriform processes on the dorsal surface. The pinnse, or feet, 

 are not separated into dorsal and ventral rami ; the setse being 

 all set in a single thick lobe, in front of which,* above, arises a 

 smaller, compressed, non-setiferous lobe. The setse are of three 

 kinds: first, a few simple capillaries; next, a cluster of strong, 

 broad setse, shaped at the end like a chopping-knife ; lastly, and 

 inferiorly, a plume of long, slender setse, thickened and inversely 

 barbed near their extremities. The inferior cirrus is as long as 

 the superior one, but more slender. Color, reddish-brown, with 

 a crimson median line on the inferior surface; setse golden; 

 cirri vermilion ; scales light brown, punctate with black, and 

 with bright sulphur-yellow margins. The specimen described is 

 two feet in length, and seven eighths of an inch in breadth. 



It inhabits a blackish tube, of a tough, glutinous structure, very 

 thick, and composed of several layers, the exterior of which are 

 very much mixed with mud. This tube is found in the sand or 

 mud, descending into it perpendicularly, for a depth equalling 

 the length of the animal. Its extremity does not project above 

 the surface, where a small aperture only is observable. Its 

 diameter is much greater than the thickness of the worm, which 

 is thus enabled to turn end' for end in it. It was thus frequently 

 captured with its head downward, and its tail at the aperture of 

 the tube, and it would seem to assume this position whenever 

 disturbed. In taking its prey, it does not wholly leave its tube, 

 but suddenly darts out its anterior extremity, seizing with its 

 powerful jaws the small Crustacea and soft mollusca upon which 

 it feeds. It was found at low-water mark, on the flats in Charles- 

 ton Harbor. 



