1911] Esterly: Copepoda of th San Diego Region. 337 



the right foot of the fifth pair is biramous. Ee referred his speci- 

 mens to /'. hiil, ntatiis Brady, but said that the females in his col- 

 lections did not correspond with Brady's descriptions. Later 

 Farnui (1905, p. 4;"). pi. 11. figs'. 12-21) also referred his speci- 

 mens to P. bidentatus Brady, but afterwards (1908, p. 83) sep- 

 arated them into two new species. The San Diego specimens do 

 not have the bidentation on the last thoracic segment, and. 

 though I have assigned an animal from this Locality to the species 

 bidentatus (Esterly, 1905, p. 191), I now think that the males 

 and females occurring in the same collections belong to this new 

 species. The most evident specific differences are found in the 

 fifth feet of the male as compared with /'. helgae Parran (1905, 

 p. 11, figs. 18, 19), and this author states that he first regarded 

 the male of this species as that of /'. hi, I, ntatus. The fifth feet 

 in the female of P. helgae (Farran. 1908, pi. 11, figs. 20, 21) 

 resemble those of P. integer, yet there are differences which I 

 think may be regarded as specific. 



Zoological Laboratory, Occidental College. 



Los Angeles, California, Mail IS, 1910. 



