ART. 17. 



AMERICAN PARASITIC COPEPODS— WILSON. 13 



LERNAEENICUS LONGIVENTRIS Wilson. Two females were taken from 

 the fle^ofTe sea drum, Pooonias cromis, at Ocean View Station, Norfolk, 

 Va October 13, 1922 ; Cat. No. 56551, U.S.N.M. 



SALMmCOLA GIBBER (Wilson). Ten females from tbe roof of the mouth 

 and tongue of the char, Salvelimis alpina alipes, from Cairn Lake, and twelve 

 fem^e^Tn the same host from Konochickalak Lake McMillan's Baffin Land 

 Expedition, June 28 and July 7, 1922; Cat. No. 56552 and 56553, ^f^-^\ 



SALMINCOLA CABPENTEBI (Packard). A dozen females were obtained by 



the fisheries steamer "Albatross" from ^^^^^^%'' 'l^J'^Tl^T' "' ' 

 Oncorhynclms nerlca, in British Columbia; Cat. No. 53512, U.S.N.M. 



ACHTHEEES AMBLOPLITIS Kellicott. Twelve females were taken from the 

 gills of the burbot, Lota maculosa, at Sturgeon Bay, Lake Michigan, July 27, 

 1920 by Prof. A. S. Pearse; Cat. No. 54144, U.S.N.M. 



ACHTHEEES COREQONI (S. L Smith). A single female from the giUs ot 

 the blackfin cisco, Leucichthys nigripinnis, at sturgeon Bay, Lake Michigan. 

 July 26 1920, bv Prof. A. S. Pearse; Cat. No. 54143, U.S.N.M. 



ACHTHEEES COEPITLENTTJS Kellicott. Two females from the gills of the 

 Cisco, Leucichthys johannae, at the same place and date; Cat. No. 56554, 



U.S.N.M. 



NOTES ON COPEPOD NOMENCLATURE. 



During a study of parasitic copepods extending over 20 years 

 many discrepancies have been observed, which there has been no 

 opportunity to correct. At the very outset of the work it was realized 

 that while it is possible to separate the group on an ecological basis 

 into' free-swimmers, semiparasites, commensals, and parasites, these 

 distinctions largely disappear when the copepods are considered 

 from a morphological or systematic standpoint. Accordingly it was 

 found necessary to include the entire group both in the bibliography 

 and in the record of species and genera. As a result two card cata- 

 loo-ues have been gi-adually accumulated, one bibliogi^aphic and the 

 other systematic. By comparing the two with each other and with 

 Scudder's Nomenclator Zoologicus and Sharp's Index Zoologicus it 

 has been possible to separate a group of generic and specific names 

 which have been preoccupied. Another small group are of such 

 doubtful validity that they can not be accepted according to our 

 present knowledge, or must even be discarded. A third gi'oup con- 

 tains a remarkably large number of copepod genera, which were es- 

 tablished prior to 1901, but which do not appear in either ot the 

 above lists. And finally there are numerous instances m which mis- 

 takes or omissions have been made in the record as it appears m the 

 two lists named above. 



PREOCCUPIED GENERIC NAMES. 

 In suggesting names to replace those already used an effort has 

 been made to preserve as far as possible the meaning of the original 

 word. Wliere this has proved to be impractical the name has been 

 radically changed. 



