APPENDIX B 

 KEYS TO THE SUBORDERS AND GENERA OF THE COPEPODA 



The suborders here used are the same as those first proposed by 

 G. O. Sars with two exceptions. First, nearly all investigators up 

 to the present time have separated the Copepoda into the Euco- 

 pepoda and the Branchiura and followed with subdivisons. But 

 these subdivisions were confined to the Eucopepoda and did not 

 appear in the Branchiura, and all of Sars's groups belong to the 

 former. Hence, the original separation into Eucopepoda and Bran- 

 chiura seems superfluous and is here entirely omitted. Instead the 

 Branchiura are made an eighth suborder, corresponding with Sars's 

 seven groups, and this is called the Arguloida to conform with the 

 other names. Again the name Lernaeoida, given by Sars to his 

 last group, can not be retained because the genus Lei'naea, for which 

 it is named, belongs in the Caligoida, another of the groups. Hence 

 the original name proposed by Sars has been changed to Lernaeopo- 

 doida. 



No valid genus proposed prior to 1928 has been intentionally re- 

 jected. A few, as follows, have been necessarily omitted because it 

 has been impossible to obtain sufficient data to include them properly 

 in the key or even to determine their validity: Ferroniera Labbe, 

 1925 ; Herouardia, Parametis^ PoHierella^ Regis^ Rhyncoceras Labbe 

 1927. It is too much to hope that none have been accidentally over- 

 looked; the author apologizes for such omissions, and they can be 

 easily rectified by inserting the genus in its proper place in the key. 

 538 



