used samplers. Due to the variety of gear used and the large 

 number of samples collected, we feel that a representative 

 species list was obtained of both infaunal and epifaunal amphi- 

 pods. Estimates of numerical density given in this report were 

 based on samples collected with either the Smith-Mac Intyre (0.1 

 m-) or the Campbell (0.56 m') grabs. 



Nearly all the gammaridean species that we collected on 

 Georges Bank are described in previous taxonomic works. Bous- 

 field's (1973) excellent systematic monograph on the shallow- 

 water amphipod fauna of New England described about one- 

 half of the species found on the bank. The next most important 

 reference is Sars (1895) classic work on the Crustacea of Nor- 

 way, which includes about one-third of the species occurring on 

 Georges Bank. Other useful systematic references include 

 Holmes (1905), Shoemaker (1930a, b, 1945a, b), Stephensen 

 (1935, 1938, 1940, 1942), Gurjanova (1951), Barnard (1960, 

 1969, 1971, 1972, 1979), Bousfield (1965, 1970, 1977, 1978), Mills 

 (1967, 1971), and Laubitz (1977). The species names used in this 

 report primarily follow Bousfield (1973), but recent revisions by 

 Barnard (1969) and Laubitz (1977) have been incorporated. The 

 systematic arrangement of species into families and super- 

 families follows the phylogenetic classification proposed by 

 Bousfield (1978). 



ANNOTATED LIST OF SPECIES 



The following list gives a summary of the geographic and 

 bathymetric ranges and sediment preference for each species 

 based on literature sources. Notes on general ecology are also 

 included when information was available. The distribution of 

 each species on Georges Bank is also characterized based on our 

 collections, and a series of charts (Figs. 4-15) show the patterns 

 of occurrence for each species collected. These charts are 

 arranged alphabetically according to the species names. 



Class Crustacea 

 Subclass Malacostraca 

 Superorder Peracarida 

 Order Amphipoda 

 Suborder Gammaridea 



Superfamily Phoxocephaloidea 

 Family Phoxocephaidae 



Harpinia propinqiia G.O. Sars, 1895. Arctic-Boreal regions 

 of North Atlantic; in western Atlantic: Arctic south to 

 Cape Hatteras; 10-1,500 m, sand to silt -clay bottoms, bur- 

 rowing detritivore (Sars 1895; Bousfield 1973; Dickinson et 

 al. 1980). 



Perimeter of Georges Bank, 84-196 m, gravel to silt-clay 

 bottoms, 4.5°-7.7°C, densities 10-50/m^ 



Phoxocephalus holbolli Kroyer, 1842. Arctic-Boreal in 

 North Atlantic; in western Atlantic: Arctic south to Vir- 

 ginia; 0-400 m, sand and silty sand bottoms, burrowing 

 detritivore (Bousfield 1973; Dickinson et al. 1980) m'. 



Perimeter of Georges Bank, 33-179 m, sand and gravelly 

 sand bottoms, 7.1°-12.3°C, densities 10-100/m^ 



Paraphoxus epistomus (Shoemaker, 1938). (Trichophoxus 

 episiomus in Bousfield 1973. See Barnard 1979 for most 

 recent discussion and proposal to change name to Rhep- 

 oxynius epistomus.) Boreal regions of North Atlantic and 

 North Pacific; in western Atlantic: Maine south to North 

 Carolina; 0-180 m, sand bottoms, burrowing detritivore 

 (Barnard 1960; Bousfield 1973; Dickinson et al. 1980). 



Central Georges Bank, 33-123 m, gravel and sand bot- 

 toms, 5.4°-12.3°C, densities 10-150/m-. 



Family Platyishnopidae. 



Platyishnopus sp. A (undescribed species). Southern edge 

 of Georges Bank, 121 m, sand bottom, 7.5 °C. This species 

 will be described by E. L. Bousfield of the Canadian Na- 

 tional Museum in Ottawa. 



Superfamily Lysianassoidea 

 Family Lysianassidae 



Anonyx debniyni Hoek, 1882. Arctic waters of North At- 

 lantic; in western Atlantic: south from Gulf of St. Law- 

 rence to Cape Cod; bathyal depths and cold water (Steele 

 and Brunei 1968). 



Western Basin of Georges Bank, 183 m, silt-clay bot- 

 toms, 6.6 °C. 



Anonyx liljeborgi Boeck, 1871. Arctic-Boreal regions of 

 North Atlantic; in western Atlantic: Arctic south to Dela- 

 ware; 0-200 m, sand and silty sand bottoms, epibenthic 

 scavenger (Steele and Brunei 1968; Bousfield 1973). 



Perimeter of Georges Bank, 60-183 m, sand and silt-clay 

 bottoms, 6.6°-11.6"C. 



Anonyx sarsi Steele and Brunei, 1968. Circumpolar; in west- 

 ern Atlantic: Arctic south to New Jersey; 0-65 m, sand bot- 

 toms, epibenthic scavenger (Steele and Brunei 1968; Bous- 

 field 1973). 



Southern edge and Northeast Peak of Georges Bank, 

 70-97 m, gravel to sand bottoms, 7.4°-7.7°C. 



Hippomedon propinquus Sars, 1895. Boreal regions of 

 North Atlantic; in western Atlantic: from Nova Scotia 

 south to Cape Hatteras; 15-250 m, gravelly sand to silt-clay 

 bottoms, epibenthic (Sars 1895; Dickinson et al. 1980). 



Western Basin and perimeter of Georges Bank, 73-196 

 m, sand to silt-clay bottoms, 6.6°-11.6°C. 



Hippomedon serratus Holmes, 1905. Western Atlantic: 

 Gulf of St. Lawrence south to North Carolina; 5-90 m, 

 sand and silty sard, epibenthic (Bousfield 1973; Dickinson 

 et al. 1980). 



Southern Georges Bank, 35-106 m, sand and gravel bot- 

 toms, 7.3°-11.6°C. 



Orchomene minuia Kroyer, 1846. Arctic-Boreal regions of 

 North Atlantic; in western Atlantic: south from Baffin 

 Island to New Jersey; 0-100 m, sand bottoms, epibenthic 

 (Bousfield 1973; Dickinson et al. 1980). 



Southern Georges Bank and Northeast Peak, 48-179 m, 

 sand and gravelly sand bottoms, 7.4°-11.6°C, densities 

 10-100/m^ 



Orchomene pinguis Boeck, 1861. Arctic-Boreal regions of 

 North Atlantic; in western Atlantic: Arctic south to North 

 Carolina; 0-100 m, sand bottoms, epibenthic scavenger 

 (Stephensen 1938; Bousfield 1973). 



Perimeter of Georges Bank, 60-168 m, sand and silt-clay 

 bottoms, 6.6°-11.2°C. 



Psammonyx nobilis Stimpson, 1853. Western Atlantic: 

 Newfoundland to New Jersey; 0-60 m, sand bottoms, bur- 

 rower (Scott and Croker 1976; Dickinson et al. 1980). 



Northern Georges Bank, 22-128 m, sand and gravelly 

 sand, 6.1°-9.3°C. 



Tmelonyx cicada O. Fabricius, 1780. Boreal-Arctic regions 

 of North Atlantic; in western Atlantic: Arctic south to New 

 Jersey; 0-2,000 m, sand and silty sand bottoms, epibenthic 

 scavenger (Sars 1895; Stephensen 1935). 



