150 EEPORT ON THE PELAGIC COPEPODA 



European species of Oithona are to be considered as varieties of 0. 

 spinirostris, Claus. The figures of Otthona in Brady^s Monograpli 

 are very unsatisfactory, but those of 0. Challengeri in tbe Cballenger 

 Report are mucli better. The only accurate drawings of Oithoiia 

 that I have seen are tbose of Giesbrecbt, whose illustrations never 

 leave anything to be desired. As his work is not always accessible 

 to Euglisb naturalists, I give, in Plate XI, figs. 7 and 8, drawings 

 of tbe mandibles and maxillee of this species. 



2. Cyclopina littoralis, Brady. 



Ctciopina littoealis, Brady. Monogr. Brit. Copep., i, p. 92, pi. xv, figs. 1—9. 

 — — I. C. Thompson. Copep. Liv. Bay, Proc. Liv. Biol. Soc, 



ii, p. 65. 



A few specimens of this well-marked species were taken in the 

 tow-net in the early days of April, 1889. 



i^am^?7/— HAEPACTID^. 



1. LONGIPEDIA CORONATA, Glaus. 



LoNGiPEDiA COEONATA, Claus. Freileb. Copep., p. Ill, Taf. xiv, figs. 14 — 24. 



— — Brady. Monogr. Brit. Copep., ii, p. 6, pis. xxxiv, xxxv. 



— — Giesbrecht. Freileb. Copep. der Kieler Foehrde, p. 99. 



— — I. C. Thompson. Cop. Liv. Bay, Proc. Liv. Biol. Soc, 



ii, p. 67. 



A few specimens were taken in the surface net in March and 

 April, II 



2. Euterpe gracilis, Claus. 



Etjteepe GEACiiis, Claus. Freileb. Copep., p. 109, Taf. xiv, figs. 1 — 13. 



— — Brady. Mouogr. Brit. Copep., ii, p. 22, pi. xl, figs. 1 — 16. 



— — I. C. Thompson. Copep. Liv. Bay, Proc. Liv. Biol. Soc, ii, 



p. 67. 



This species, rare in most localities, is very abundant near Ply- 

 moutb in late winter and spring. I first found it on February 20th, 

 1889, when the tow-net taken near the Eddystone Lighthouse con- 

 tained a profusion of females, nearly all carrying ovisacs. Since 

 that date I have taken both males and females, sometimes sparingly, 

 sometimes abundantly, in nearly every gathering up to May 20th. 



3. Thalestris mysis, Glaus. 



Thalesteis mtsis, Claus. Freileb. Copep., p. 130, Taf. xviii, figs. 12 — 16. 



— — Brady. Monogr. Brit. Copep., ii, p. 121, pi. Iviii, figs. 1 — 13. 



