428 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



The body was approximately 300 mm. long, with a head width of 

 about 2 mm. Anteriorly the somites are broadly rounded dorsally, 

 and flattened ventrally, with the parapodia at the ventro lateral 

 angles. After about the first quarter of the body where, apparently, 

 the sex products begin to appear, the ventral surface is rounded and 

 the body assumes very nearly a circular cross section with the para- 

 podia on the lateral edge. 



The head is rather deeply incised by a V-shaped depression, each 

 lateral half ending in a rounded point. The antennae had all been 

 lost, and the peristomium was mutilated so as to show no indication 

 of the character of the nuchal cirri. The eyes were oval in outhne, 

 situated in the usual position. Two pairs of anal cirri, one much 

 larger than the other, are carried on the pygidium. 



Parapodia from the anterior region of the body (fig. 3), show a 

 romided setal lobe with practically equal anterior and posterior hps, 

 and two heavy brown aciculae. The dorsal cin-us is long, slender, 

 finger-shaped, the ventral one orbicular, flattened. Two tufts of setae 

 arise very close together, the dorsal ones simple, curved, without 

 perceptible wings, but with the edges finely striated (fig. 4). Ventral 

 setae compound, basal portion serrate along its apex, terminal joint 

 with finely serrated sheath and subterminal tooth longer than ter- 

 minal one (fig. 5). No pectinate setae appeared in any of the para- 

 podia examined. 



The posterior parapodia were as figured by Woodward. The setae 

 lobes are slender and elongated, and the setae are essentially hke those 

 farther forward except that the basal portion of the compound setae 

 is much elongated. 



PHYLLODOCE PANAMENSIS, new species. 



Description. — Head unusually broad as compared with length 

 (fig. 1), the width behind antennae being nearly equal to that of pos- 

 terior margin. Eyes situated about midway of the head, small, w^th 

 very small lenses. A noticeable gi-oove at middle of posterior mar- 

 gin, into which a lobe from the anterior margin of the first somite 

 extends. Antennae about one-third as long as head, bluntly pointed 

 at apex. There is a pigmented band around the head just posterior 

 to the antennae, and a very narrow band of pigment along the pos- 

 terior margin. 



Tentacular cirri with rather long basal joints, the terminal joint of 

 the first about equal in length to that of the ventral one on somite 

 two. Dorsal cirrus of somite two equal to that of somite three, ex- 

 tending to somite nine. All cirri showed traces of pigment patches. 

 Doral cirrus of somite four, leaf -hke, but very small; those of succeed- 

 ing somites increase rapidly in size to the eighth, while from here 

 backward the increase is very gradual. All of the later cirri overlap 

 one another, the exposed portion showing a broad pigmented band, 



