circ'umeuropean distribution it has also been 

 reported from Ceylon, India, Washington (USA), 

 and Brazil. It is probably cosmopolitan. 



HaU ctinosoma ciirticorne (Boeck, 1872). Ec- 

 tinosoma curticornr Boeck of Williams (1906), 

 Sharpe (1911), and Wilson (1932). Distributed over 

 the North Atlantic and also reported from the White 

 Sea (USSR), Brazil, and India. 



H. elongatum (Sars, 1904). Ectinosoma elongatum 

 Sars of Wilson (1932). One specimen from deep 

 water off Gay Head, Martha's Vineyard. Also, 

 known from Northern Europe and North Carolina 

 (Coull 1971a). 



H. kumi Lang, 1965. New Jersey salt marshes by 

 Brickman (1972). The only other known collections 

 are from California (Lang 1965), North Carolina 

 (Coull 1971a), and South Carolina (Coull unpubl. 

 data). 



Microsetella norvegica Boeck, 1864). A euplanktonic 

 form from Narragansett Bay (Williams 1906), 

 Woods Hole (Fish 1925), and Martha's Vineyard 

 (Wilson 1932). Cosmopolitan species in relatively 

 warm waters. 



M. rosea (Dana, 1848). From plankton tows at Woods 

 Hole (Fish 1925), Wilson (1932). A cosmopolitan 

 species. 



Pseudobradya pulchera Lang, 1965. Brickman (1972) 

 reported this species from New Jersey salt marshes. 

 It is also known from California (Lang 1965), Bar- 

 bados (Coull 1970), and the Virgin Islands (Coull 

 1971b; Hartzband and Hummon 1974). 



Sigmatidium minor (Kunz, 1935). Brickman (1972), 

 New Jersey salt marshes, the only northeastern LI.S. 

 listing. A detrital species known previously from 

 Europe. 

 Family D'Arcythompsoniidae Lang, 1936. The entire 

 family is characteristic of low-salinity brackish 

 waters. 



D 'A rcyt ho m psonia inopinata Smirnov, 

 1934). Brickman (1972), New Jersey salt marshes. 

 Known previously only from the Sea of Japan. 



D. pan a Wilson, 1932. Wilson (1932), brackish 

 ponds on Chappaquiddick Island, the only record. 



Leptocaris brcL-icornis (Douwe, 1904). Horsiella 

 brevicornis Douwe of Brickman (1972). Brickman 

 (1972), New Jersey salt marshes. Circumeuropean 

 distribution also found in North and South Carolina 

 and in mangrove swamps near Miami, Fla. (Hopper 

 et al. 1973). Usually associated with detritus. Lang 

 (1965) revised the genus. 

 Family Tachidiidae Sars, 1909; Char. rev. Lang, 1948. 



Mkroarthriduin littoralc (Poppe, 1881). Tachidius 

 littoralis Poppe of Williams (1906) and Wilson 

 (1932). From Narragansett Bay (Williams 1906; Wil- 

 son 1932) and New Jersey salt marshes (Brickman 

 1972). North Atantic distribution. 



Tachidius discipcs Gieshrecht, 1881. Tachldiiis 

 brcL'iciirnis Boeck of Williams ( 1906). Sharpe (1911), 

 Fish (1925), and Wilson (1932). Phytal and benthos 

 at Woods Hole, Ma.ss. (Fish 1925; Wilson 1932), 



Long Island, N.Y. (Sharpe 1911; Coull unpubl. 

 data), and Charleston Pond, R.I. (Williams 1906). A 

 cosmopolitan species. 

 T. incisiprs Klie, 1913. Brickman (1972) from New 

 Jersey salt marsh detritus. Known from Northern 

 Europe. 



Thompsonula curticauda (Wilson, 1932). Rath- 

 bunula custicauda Wilson (1932). Sandy beaches at 

 Woods Hole, Mass. 



T. hyarnac (Thompson, 1889). Echinocornus pec- 

 tinatus Wilson (1932); Rathbunula agilh by Wilson 

 (1932). I have collected this species on sandy sub- 

 strates at Nahant, Mass.; Beaufort, N.C.; and 

 Georgetown, S.C. which to now is the known extent 

 of its U.S. distribution. It is a sandy substrate 

 species well known from Europe. 



Family Harpacticidae Sars, 1904. 



Harpacticus chelifer (Miiller, 1776). Common in 

 Rhode Island; Woods Hole, Mass.; and Long Island, 

 N.Y. (Williams 1906; Sharpe 1911; Fish 1925; Wil- 

 son 1932). Worldwide distribution (Lang 1948). 



*H. gracilis Claus, 1863. Lang (1948) asserted Wil- 

 son's (1932) report of this species is in error, "offen- 

 bar false agaben." Never reported outside of Europe 

 except for the Wilson report. 



*H. tenellus Sars, 1920. Algae, Eel Pond, Woods 

 Hole (Wilson 1932). Circumeuropean distribution 

 with the exception of Wilson's (1932) report, two 

 North Carolina reports (Coull 1971a; Lindgren 

 1972), and a South Atlantic report (Tristan da 

 Cunha, Wiborg 1964). Lang (1948) felt Wilson erred 

 in identifying this species also. 



H. unircmus Krciyer, 1942. Williams (1906), Fish 

 (1925), and Wilson (1932) reported it from New 

 England waters among vegetation. It is probably a 

 cosmopolitan species. 



Zaus goodsiri Brady, 1880. Wilson (1932) from Den- 

 nis, Mass, Known from the North Atlantic. 



Zausodes arenicolus Wilson, 1932. Wilson's original 

 description listed this species from sand at Martha's 

 Vineyard. Further reported from along the U.S. east 

 coast and the Caribbean. 



Family Tisbidae (Stebbing, 1910); Char. rev. Lang, 

 1948. The genus Tisbe is presently being revised 

 (B. Volkmann, pers. commun.). 

 Sacddiscus oralis (Wilson, 1944). Humes (1960) 

 reported this species associated with lobsters 

 collected in Maine and New Hampshire. Also known 

 as associated with Newfoundland. New Brunswick, 

 and (Juehec lobsters. 



Tisbc bulbisctosa Volkmann-Rocco 1972. Collected 

 troni the Woods Hole region among algae by Bruno 

 Baltaglia (B. Volkmann pers. commun.). Also 

 known from North Carolina and Italy (Volkmann- 

 UcHco 1972). 



7'. funala (Maird. 1837). Cosmopolitan species sup- 

 posedly known from all over New England. The con- 

 Inscd tMxononiy of the genus (see Volkmann-Rocco 



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