HAUSTORIIDAE OF NEW ENGLAND — BOUSFIELD 197 



long, rami short. Uropod 3: outer ramus with distinct terminal 

 segment. Telson sharply incised, lobes apically spinose. 



Type species. — Haustorius arenarius (Slabber) 1769. 



Additional species. — Haustorius canadensis Bousfield 1962. 



Haustorius canadensis Bousfield 1962 



Figures Id, 2a, 4g, 5a 



Haustorius arenarius. — Paulmier, 1905, p. 157, fig. 25. 



Material examined. — Saco, Maine, May 30, 1957, F. A. Chace, 

 Jr.: 1 9, ov., 17 mm. (MCZ 8992). Brewster, Mass., along sandy 

 shore, 2-4 ft.. May 22, 1960, R. L. Wigley: 6 99, 1 ov., 6 cfcf , 2 imm. 

 (NMC 7077). Newbm-yport, Mass., May 26, 1943, C. E. Addy: 



1 d" (USNM ace. 167331). Woods Hole region, Mass., Aug. 22, 1952 

 [no other data]: 2 cfcf, 1 9 (USNM collections). Naushon, Mass., 

 Tarpaulin Cove, July 21, 1893, W. P. Hay: 19 d'd^, 13 99 (USNM 

 21827). Cape Cod, Mass., West Falmouth Marsh, 1-3 ft., Jan. 8, 

 1961, R. L. Wigley: 1 cf (NMC 7078). Falmouth, Mass., Sippewis- 

 set Marsh, 1-3 ft., Feb. 13, 1960, R. L. Wigley: 5 99, (br. II), 5 c^cf , 



2 juv. (NMC 7079). Newport, R.I., May 1893, S. D. Judd: 10 99, 

 7 ov., 19 d'c^ (USNM ace. 34225) ; same locality, second lot: 9 cfcT, 

 12 99. Sagaponack Lake, 3 miles south of Bridgehampton, N.Y., 

 Aug. 18, 1938, H. K. Townes: 4 cTcf , to 17 mm (USNM ace. 149428). 

 Arundel-on-the-Bay, Md., W. P. Hay: 115 specimens (USNM ace. 

 22157). 



Cape Cod region, Mass.: Little Sippewisset Marsh, sand banks near 

 mouth of estuary, low water to midwater, Sept. 8, 1963: 4 99, 2crcr, 



3 imm. ; Great Sippewisset Marsh, sand bars above mouth, midwater 

 level, Sept. 8, 1963: 1 imm.; Nobscussett Beach, sand flats at break- 

 water, midwater level, Sept. 9, 1963: 1 imm. (MBL, author collec- 

 tions). Northern New England, 1963: 431 specimens obtained at 8 

 stations, mostly from inter-tidal sandbanks at the mouths of small 

 estuaries, from East Sandwich, Mass., north to Biddeford Pool 

 (Casco Bay), Maine, including Plum Island, Mass., Seabrook Beach, 

 N.H., Cape Neddick Beach, Ogunquit, Pine Pt., Maine (NMC, 

 author collections). 



Remarks.^ — Material from New England, particularly from Con- 

 necticut and Long Island region, reaches a larger size (to 18 mm.) 

 and has a more pronounced rostrum (fig. Id) than specimens from the 

 Gulf of St. Lawrence. The smaller, short rostrate type occurs 

 throughout the Cape Cod region and northward. The large animals 

 (17-18 mm.) are probably adults that have survived into the second 

 year of reproduction. 



