176 • PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



A new genus, related to JSpio, but with a pair of branchial append- 

 ages behind the long antennae, and with a distinct collar on the front 

 edge of the second setigerous segment, was discovered near New Haven, 

 Conn., at low-water, in 1877, and had been briefly described in this arti- 

 cle. But learning that Professor H. E. Webster had also discovered the 

 same genus, and had described it in a forthcoming paper on the Anne- 

 lids of New Jersey, with an abundance of good specimens, my descrip- 

 tion has been withdrawn. 



Spio limicola, sp. iiov. 



A small, slender species, with branchiae on all the segments, and usu- 

 ally characterized by blackish, transverse lines and spots on the head 

 and anterior segments. Body thickest anteriorly, tapering gradually 

 to the end, somewhat depressed. Head flattened, obtusely rounded in 

 front. Eyes four, small, nearly in a square. The anterior a little wider 

 apart. Antennae rather stout at base, tapered, blunt, about four or five 

 times as long as breadth of body, whitish, with red vessels, and some- 

 times with thin, dark lines along the edges. Branchiae flat, shorter, 

 broader, and blunt anteriorly; narrower, longer, and more tapering far- 

 ther back, where they meet across the back; posteriorly they become 

 small and papilliform. The parapodia have anteriorly, in the upper 

 ramus, two broad lingulae, of which the posterior is the longer and more 

 acute; the capillary setae, arising between them, form large fascicles 

 anteriorly ; posteriorly they become longer, exceeding the diameter of 

 the body, and form small fascicles. In the posterior region, the upper 

 lingulae become more unequal, the posterior one becoming elongated and 

 the anterior one reduced to a mere papilla. The lower ramus is nearly 

 the same on all the segments, consisting of a broadly rounded, flat, thick 

 lobe, bearing a group of numerous uncini. Anal segment small, bear- 

 ing four moderately long, blunt cirri, their length about twice the diam- 

 eter of the anal segment. 



Color, pale reddish white or light flesh-color, with bright red vessels 

 and branchiae, and showing the greenish intestine posteriorly; head 

 with two blackish spots in front and others on the sides and beneath; 

 anterior segments with blackish, transverse spots or interrupted lines 

 of blackish between the segments on the ventral side and laterally ; bran- 

 chiiE and both upper and lower lingulae usually with flake- white specks 

 or a white line along their margins ; anal segment and cirri greenish 

 yellow. 



Length, 25""" to 35™"; breadth, 1""" to 1.5"". Described from life. 

 Cape Cod Bay, 16 to 25 fathoms, soft, foetid, sandy mud (U. S. Fish 

 Commission, 1879). Some of the specimens were filled with pink eggs, 

 August 29. 



Spiophanes tenuis, sp. no v. 



A very delicate and slender species, thickest anteriorly at the bran- 

 chial segments, gradually attenuated posteriorly. Head changeable, 



