140 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.37. 



tend to XXIX, inclusive. Caudal cirri 1.5 mm. long. Branchia3 

 shorter than in Malmgren's figure and his figures of uncini imperfect 

 in that they fail to show the double series of marginal teeth ; those 

 examined have 4 teeth in each series. Tentacles ciliated. The 

 tube is moderately firm with collapsable ends, formed of fine silt, and 

 measures 170 nun. long by 5 mm. in diameter. Not previously re- 

 i^orted from the American coast. 



SAMYTHA SEXCIRRATA Sars. 



Port Man vers, August 21, 30 fathoms, sticky mud. 



Two specimens (the largest 22 mm. long, found in a soft mucoid 

 tube) appear to belong to this species, but exhibit several peculiari- 

 ties. There are only 16 setigerous segments instead of the typical 

 17 ; this count is reliable for one specimen, but the other is macerated 

 about the middle, and it is possible that a seventeenth ma}^ bear setse. 

 There are 12 post-setigerous segments, and the pygidium is 4-lobed, 

 with a pair of ventral cirri. One has three pairs of branchiae ar- 

 ranged typically in a transverse rank on a ridge. On the other the 

 rank is crowded and irregular and on the right side an additional 

 gill — making 7 in all — quite similar to the others arises behind them. 

 The uncini have the marginal teeth in two alternating series of five 

 or six each. Verrill reports this species from several localities on the 

 northern New England coast. 



Family AMPHICTENID^. 



PECTINARIA (CISTENIDES) HYPERBOREA (Malmgren). 



Egg Harbor, August 10, 7 fathoms, mud; off Beachy Island, be- 

 tween Flint Island and Cape Mugford, August 22, 80 fathoms, soft 

 mud ; halfway between Cape Mugford and Hebron, August 23, 60 

 fathoms, mud and sand. The tubes measure from 9 to 72 mm. long, 

 the largest being mm. in diameter at the mouth. The worms have 

 12 or rarely 13 pairs of palea^, and the uncini sometimes have 4 in- 

 stead of 3 large hooks. Though common in Greenland waters, this 

 species is new to the American coast, though it seems probable that 

 some of the records of the closely similar P. granvlata may refer to 

 this species. P. granulata is reported by Packard as common in 

 Labrador, and is recorded from all parts of the Xew England coast, 

 especially northward. 



Family TEKEBELLID^. 



AMPHITRITE INTERMEDIA Malmgren. 



About 40 miles west b}^ south from Cape Sable, Nova Scotia, Octo- 

 ber 8, 76 fathoms, black gravel, k. single specimen G5 mm. long. 

 Verrill has recorded this species from the northern New England 

 coast. 



