Perimeter of Georges Bank, 91-183 m, sand and silt-clay 

 bottoms, 6.3°-7.6°C. 

 Tryphosella nanoides Liljeborg, 1865. Eastern North Atlan- 

 tic; not previously reported from western Atlantic; 100-700 

 m (Sars 1895; Stephensen 1935). 



Northern edge of Georges Bank, 179 m, sand bottom, 

 7.8 °C. 



Superfamily Pontoporeioidea 

 Family Pontoporeiidae 

 Amphiporeia giganlea Bousfield, 1973. Western Atlantic: 

 Cape Cod south to New Jersey; 10-40 m, sand bottoms, 

 burrowing detritivore (Bousfield 1973; Glennon 1979). 



Central Georges Bank, 20-55 m, sand bottom, 

 7.8°-9.4°C. 

 Amphiporeia virginiana Shoemaker, 1933. Western Atlan- 

 tic: Nova Scotia south to South Carolina; 0-15 m, sand 

 bottoms, burrowing detritivore (Bousfield 1973; Hager and 

 Croker 1979). 



Central Georges Bank, 33 m, sand bottom, 8.4°C. 

 Balhyporeia quoddyensis Shoemaker, 1949. Western Atlan- 

 tic: Nova Scotia south to Virginia; sand bottoms, burrow- 

 ing detritivore (Bousfield 1973). 



Central Georges Bank, 33-66 m, sand bottom, 7.6 °C. 



Family Haustoriidae 

 Acanthohaustorius intermedins Bousfield, 1965. Western 

 Atlantic: Cape Cod to Florida; 0-40 m, sand bottoms, bur- 

 rowing filter feeder (Bousfield 1973; Dickinson et al. 1980). 

 Central Georges Bank, 33-66 m, sand bottom. 

 Acanthohaustorius similis Frame, 1980. Western Atlantic: 

 Cape Cod south to Cape Hatteras; 10-74 m, sand bottoms, 

 burrowing filter feeder (Dickinson et al. 1980; Frame 1980). 

 Central Georges Bank, 33-66 m, sand bottom. 

 Acanthohaustorius spinosus Bousfield, 1962. Western At- 

 lantic: Nova Scotia to New Jersey; 0-200 m, sand bottoms, 

 burrowing filter feeder (Bousfield 1973). 

 Central Georges Bank, 64 m, sand bottom. 

 Acanthohaustorius sp. C (undescribed species). Western 

 Atlantic: Cape Cod to Cape Hatteras; 10-40 m, sand bot- 

 toms (Dickinson et al. 1980). 



Central Georges Bank, 46-49 m, sand bottom. 

 Acanthohaustorius sp. D (undescribed species). Central 



and Southern Georges Bank, 46-82 m, sand bottoms. 

 Parahaustorius altenuatus Bousfield, 1965. Western Atlan- 

 tic: Cape Cod south to Virginia; 0-75 m, sand bottoms, 

 burrowing filter feeder (Bousfield 1965, 1973; Dickinson et 

 al. 1980). 

 Central Georges Bank, 33-66 m, sand bottom. 

 Parahaustorius holmesi Bousfield, 1965. Western Atlantic: 

 Cape Cod to Virginia; 20-50 m, sand bottoms, burrowing 

 filter feeder (Bousfield 1965, 1973). 



Central Georges Bank, 35-42 m, sand bottom, 13.4°C. 

 Parahaustorius longimerus Bousfield, 1965. Western Atlan- 

 tic: Cape Cod Bay south to northern Florida; 0-10 m, sand 

 bottoms, burrowing filter feeder (Bousfield 1965, 1973; 

 Croker 1967). 



Central Georges Bank, 20-66 m, sand bottom. 

 Protohaustorius deichmannae Bousfield, 1965. Western At- 

 lantic: Maine to South Carolina; 0-40 m, sand, shelly sand, 

 and silty sand bottoms, burrowing filter feeder (Bousfield 

 1965, 1973; Dickinson et al. 1980). 



Central Georges Bank, 46-60 m, sand bottom. 

 Protohaustorius wigleyi Bousfield, 1965. Western Atlantic: 

 Maine to North Carolina; 0-150 m, shell and sand bot- 

 toms, burrowing filter feeder (Bousfield 1965, 1973; Dick- 

 inson et al. 1980). 



Central and southern Georges Bank, 33-95 m, sand and 

 gravelly sand bottoms, 7.6°-12.3°C, densities 10-300/m-. 

 Pseudohaustorius boreatis Bousfield, 1965. Western Atlan- 

 tic: Georges Bank to Virginia; 10-60 m, sand bottoms, bur- 

 rowing filter feeder (Bousfield 1965, 1973; Dickinson et al. 

 1980). 



Central and northern Georges Bank, 46-88 m, sand 

 bottoms. 

 Superfamily Gammaroidea 

 Family Gammaridae 



Gammarus annulatus Smith, 1873. Western Atlantic: Nova 

 Scotia to Long Island Sound; 0-200 m, sand bottoms, 

 epibenthic or pelagic, omnivore (Bousfield 1973; Dickinson 

 et al. 1980). 



Southwest Georges Bank, 123 m, sand bottom, (it is 

 noteworthy that this species, which reaches densities of 

 600/m' on Nantucket Shoals (Dickinson et al. 1980), was 

 represented by only a single specimen on Georges Bank.) 



Superfamily Eusiroidea 

 Family Eusiridae 



Eusirus cuspidatus Kx6yer, 1 845. Arctic Atlantic; in western 

 Atlantic: Arctic south to Bay of Fundy; 40-400 m, epiben- 

 thic or pelagic, probably carnivorous (Sars 1895; Stephen- 

 sen 1935). 



Western Basin of Georges Bank, 183 m, silt bottom, 

 6.6 °C. 

 Rhachotropis distincta (Holmes, 1908). Arctic-Boreal re- 

 gions of North Pacific and North Atlantic; in western 

 Atlantic: Arctic south to Gulf of St. Lawrence, 300-1,200 

 m, epibenthic carnivore (Barnard 1971; Bousfield 1973). 



Western Basin of Georges Bank (southern range exten- 

 sion), 157-196 m, silt-clay bottoms, 6.6°-7.7°C. 

 Rhachotropis inflata (G. O. Sars, 1882). Boreal regions of 

 North Pacific and North Atlantic; in western Atlantic: Arc- 

 tic south to Virginia; 20-100 m, epibenthic carnivore (Bar- 

 nard 1971; Dickinson et al. 1980). 



Southern edge of Georges Bank, 72-144 m, sand and 

 gravel bottoms, 7.2°-12.6°C. 

 Rhachotropis oculata (Hansen, 1887). Pan-Arctic and 

 Arctic-Boreal; in western Atlantic: Greenland south to 

 Cape Cod; 5-l(X) m, epibenthic and pelagic carnivore 

 (Bousfield 1973). 



Southeast Georges Bank, 82-95 m, sand bottom. 



Family Pontogeneiidae 



Pontogeneia inennis (Kr6yer, 1842). Arctic-Boreal in North 

 Atlantic and North Pacific; in western Atlantic: Arctic 

 south to Virginia; 0-80 m, rocky bottoms, epibenthic and 

 pelagic (Bousfield 1973; Dickinson et al. 1980). 



Central Georges Bank, 20-179 m, gravel to sand bot- 

 toms, 7.0°-11.3°C. 



Family Calliopudae 



Calliopius laeviusculus (KreJyer, 1838). Arctic-Boreal in 

 North Atlantic and North Pacific; in western Atlantic: 

 Labrador south to New Jersey; 0-30 m, rock and gravelly 



