ART. 5. 



NORTH AMERICAN PARASITIC COPEPODS WILSON. 



87 



Dichelestium sturionis Burmeister, Beschreibung einiger neueu oder 



weniger bekaunten Schmarotzerkrebse, 1832, p. 328. 

 Dichelestium sturionis Rathke, Nova Acta Academiae Leopoldinae Carol- 



inensis, 183G, vol. 19, p. 127, pi. 17, figs. 1-17. 

 Dichelestium sturionis Kk0yek, Naturhislorisk Tidsskrift, vol. 1, 1837, 



p. 299, pi. 2, figs. 5 and 5a; Isis, 1840, p. 764, pi. 2, fig. 5; Kf.ugellgt 



Danske Videnskabernes Selskab, vol. 9, 1842, p. 344, pi. 3, fig. 8. 

 Dichelestium sturionis Guerin, Inconpgraphie du Regne Animal, 1840, p. 



43, pi. 35, fig. lOa-c. 

 Dichelestium. sturionis Milne Edwards, Histoire Naturelle des Crustac^s, 



1840, vol. 3, p. 485, pi. 39, fig. 4; Atlas du Regne Animal de Cuvier, 1849, 



pi. 79, fig. 2. 

 Dichelestium sturionis Bassett-Smith, Proc. Zool. Soc. London, 1899, 



p. 473. 

 Dichelestium sturionis Hofer, Handbuch der Fishkrankheiten, 1904, p. 



182. 

 Dichelcsthium sturionis M. J. Rathbun, Fauna of New England, No. 5, 



Crustacea, 1905, p. 97. 

 Diehelesthium sturionis Brian, Copepodi Parussiti del Pesci d'ltali:!, 1900, 



p. 67. 

 Dichelestium oblongum Norman and T. Scott, Crustacea of Devon and 



Cornwall, 1806, p. 215. 

 Dichelestium oblongum T. and A. Scott, British Parasitic Copepoda, 1913, p. 



106, pi. 31, figs. 7-18 ; pi. 45, figs. 4-5. 



Host and record of specimens. — So far as known this parasite, 

 which is very common in Europe as well as America, has never been 

 found upon any host except the common sturgeon, Acipenser sturlo. 

 This fish is found along our Atlantic coast from Canada to the Caro- 

 linas and from it have been obtained the following specimens in the 

 collection of the National Museum : 



Remarks. — This genus is monotypic and the single species has been 

 described and figured so many times that the genus diagnosis is suf- 

 ficient for the present paper. It is unfortunate that the wrong specific 



