CORRECTIONS AND ADDITIONS. 





Page 8. For Oithona helgolandica, Glaus read: 

 Oiihona similis, Glaus. 



Oithona similis, Glaus, Die Copepoden Fauna von Nizza, p. 14. 



Remarks. On a closer consideration, I am now led to the conclusion, 

 that the 2 forms recorded by Glaus under the names O. helgolandica and 

 O. similis are in reality very distinct species, the former being in all pro- 

 bability identical with the form subsequently described by Giesbrecht as O. nana. 

 This species, which accordingly must bear the older name helgolandica, has 

 not yet been observed off the Norwegian coast. For the northern species 

 described page 8 as O. helgolandica the specific name similis given to it by 

 Glaus ought of course to be retained. 



Page 9. Add the following genus and species: 



Gen. Paroithona, Farran, 1908. 



Generic Characters. General form of body resembling that in Oithona, 

 the 2 chief divisions being sharply marked off from each other. Cephalon 

 distinctly defined from the first trunkal segment, and having the front rounded 

 off below, without any rostral projection. Tail slender, with long diverging 

 apical setae. Antennae and oral parts on the whole built on the same type as 

 in Oithona, except that the mandibular palp is somewhat simpler in structure. 

 Natatory legs with the inner ramus in all pairs only composed of 2 joints. 

 Last pair of legs very small. 



Remarks. This genus, recently established by Farran, is closely allied 

 to Oithona, from which it is chiefly distinguished by the inner ramus of all 

 the natatory legs being only biarticulate. Mr, Farran has recorded 2 species 



