1971) makes it impossible to state with certainty 

 whether the New England listings are correct. Volk- 

 mann (pers. commun.) thinks that most of the 

 listings for T. furcata are incorrect although she has 

 identified the "real" T. furcata from collections in 

 the Woods Hole region. 



T. gracilis (T. Scott, 1895). Yeatman (1963) 

 redescribed this species from Chappaquiddick 

 Island. According to Volkmann (1973) the species 

 has a North Atlantic distribution. 



T. holothuriae Humes 1957. Collected by Bruno Bat- 

 taglia among algae at Woods Hole, Mass. (Volk- 

 mann pers. commun.). Known from most of Europe 

 (Germany to Italy) and North Carolina. 



T. longicornis (T. & A. Scott, 1895). Wilson (1932), 

 plankton tows, Cuttyhunk Island. North Atlantic 

 distribution. 



*T. wilsoni Seiwell, 1928. Seiwell (1928) and Wilson 

 (1932), as a commensal on the sea pork Amaroucium 

 at Woods Hole, Mass. No other listing. Volkmann 

 (pers. commun.), after examining the types of T. 

 wilsoni. feels that it is identical with, and therefore a 

 junior synonym of, T. gracilis. 



Tisbella pulchella (Wilson, 1932). Chappaquiddicka 

 pulchella by Wilson (1932). From ponds, Chap- 

 paquiddick Island (Wilson 1932; Yeatman 1963). 

 Also known from Bermuda. 

 Family Peltidiidae Sars, 1904. 



Alteutha depressa (Baird, 1837). Sharpe (1911), Fish 

 (1925), and Wilson (1932) from plankton tows 

 among algae in and around Woods Hole, Mass. and 

 Sharpe from Sheepshead Bay, Brooklyn, N.Y. This 

 dorsoventrally flattened animal is typically epiphy- 

 tic on shallow marine algae and grasses, with a cir- 

 cumeuropean distribution. 



Family Pseudopeltidiidae Poppe, 1891. 



Clytemnestra rostrata (Brady, 1883). Euplanktonic, 

 collected by Wheeler (1899) 60 miles south of 

 Martha's V'ineyard. Cosmopolitan in relatively 

 warm waters. 



Family Tegastidae Sars, 1904. 

 Parategastes sphaericus (Claus, 1863). Amphipod- 

 shaped, traditionally found among algae, reported 

 by Williams (1906) from Narragansett Bay and by 

 Fish (1925) and Wilson (1932) from Woods Hole. 

 Known also from Europe. 



Family Thalestridae Sars, 1905; Char. rev. Lang, 1948. 



Dactylopndia tisboides (Claus, 1863). Dactyiopusia 

 tisboides (Claus) of Sharpe (1911) and Wilson 

 (1932). Woods Hole region, associated with vegeta- 

 tion. Probably cosmopolitan, known from the At- 

 lantic, Pacific, and Indian oceans. 



D. vulgaris (Sars, 1905). Dactyiopusia vulgaris Sars 

 of Williams (1906), Sharpe (1911), Fish (1925), and 

 Wilson (1932). Associated with algae in New 

 England. North Atlantic distribution, one record 

 from South Atlantic. 



Diarthrodes dissimilis Lang, 1965. New Jersey salt 

 marshes (Brickman 1972). Only other record is 



original description by Lang (1965) from California. 



D. minutus (Claus, 1863). Parawestwoodia minuta 

 (Claus) of Fish (1925); Pseudothalestris minuta 

 Claus of Wilson (1932). Plankton tows. Woods Hole, 

 Mass. (Fish 1925; Wilson 1932). North Atlantic dis- 

 tribution. 



D. nobilis (Baird, 1845). Pseudothalestris nobilis 

 (Baird) of Wilson (1932). From brackish ponds, 

 Cape Cod, Mass. (Wilson 1932). North Atlantic- 

 Mediterranean distribution. 



D. pygmaeus (T. & A. Scott, 1895). Pseudothalestris 

 pygmaea (T. Scott) of Wilson (1932). Plankton tow, 

 Woods Hole, Mass. (Wilson 1932). Circumeuropean 

 distribution and additional recordings from Brazil 

 and North Carolina. 



Paradactylopodia brevicornis (Claus, 1866). Dac- 

 tyiopusia brevicornis (Claus) of Wilson (1932). Cos- 

 mopolitan species Wilson (1932) collected in 

 brackish Cape Cod and Martha's Vineyard ponds. 

 Common in vegetation. 



Parathalestris croni (Kr«(yer, 1842). Halithalestris 

 croni Kr«(yer of Sharpe (1911), Fish (1925), and Wil- 

 son (1932); Thalestris serrulata Brady of Williams 

 (1906). All northeastern reports are from plankton 

 tows around Cape Cod and Gulf of Maine, except 

 Williams' report from Narragansett Bay pilings. A 

 North Atlantic species. 



Thalestris gibba (Kr^yer, 1842). Wilson (1932) 

 reported T. gibba from fouled boards at Gloucester, 

 Mass. and from plankton at Woods Hole. North At- 

 lantic distribution. 



Family Parastenheliidae Lang, 1948. 

 Parastenhelia spinosa (Fischer, 1860). Micro- 

 thalestris littoralis Sars of Wilson (1932); M. for- 

 ficula (Claus) of Wilson (1932). Plankton tows, Cut- 

 tyhunk Harbor and algae at Woods Hole (Wilson 

 1932). Cosmopolitan species usually associated with 

 marine plants. 



Family Diosaccidae Sars, 1906. 



Amphiascoides debelis (Giesbrecht, 1881). A 

 cosmopolitan species, northeastern United States 

 record from Scituate, Mass. among algae (Rosen- 

 field 1967). 



Amphiascopsis cinctus (Claus, 1866). Amphiascus 

 cinctus (Claus) of Wilson (1932); Amphiascus 

 obscurus Sars of Fish (1925) and Wilson (1932). 

 Cosmopolitan in algae and sediments. 



Amphiascus ampullifer (Humes, 1953). Mes- 

 amphiascus ampullifer Humes (1953). Known only 

 from its original description associated with the 

 mouth parts of the American lobster (Humes 1953). 



A. minutus (Claus, 1863). A cosmopolitan species 

 reviewed by Lang (1965) and reported from 

 Massachusetts Bay by Rosenfield (1967) and New 

 Jersey salt marshes (Brickman 1972). 



A. parvus Sars, 1906. Probably a cosmopolitan 

 species. Known from Woods Hole region (Wilson 

 1932). 



41 



