PRE8H-WATEB 01 < ILOPJ n.r: \\i> c \ I. . \i n.i:. 27 



L878. Cyclops tcquorcus, Brady (32), p. 119, pi. XIX., 



figs. 8-10; pi. XXI., figs. 10-17. 



([//clops aguoreus occurs not uncommonly in the braokish pools 

 of salt-marshes in many parts of the British Islands. The only 

 localities which I have to add to those already recorded, are 

 Lymington, Hants (G.S.B.) ; Poole, Dorset (Rev. Dr. Norman) ; 

 Loch Stennis, Orkney (Mr. T. Soott), 



| Cyclops Helleri, Brady. 



In the many collections which 1 have examined during the 

 preparation of this memoir, I have found no specimens which I 

 could certainly refer to C. Helleri, while those upon which the 

 species was originally founded have been lost by evaporation of 

 the spirit in which they were preserved. It is perhaps more 

 than probable that the types represented one of the stages of 

 development of a seventecn-jointcd specios, and under this im- 

 pression it seems best for the present to regard the species as 

 one of doubtful validity.] 



Family CALANIDvE. 

 Genus DIAPTOMUS, Westwood. 

 (Cyclopsine, Fischer.) 



1. Diaptorrms Castor (Jurine), (PI. XL, figs. 1-6). 



1785. Cyclops caruleus, Miiller (1), p. 102, pi. XV., figs. 1-9. 

 ,, lacinulattis ( 2 ), idem, ibidem, p. 105, pi. XVI., 



figs. 4-6. 

 ,, rubens (# ), idem, ibidem, p. 104, pi. XVI., 



figs, 1-3. 

 1820. Monoculus Castor, Jurine (3), p. 50, pi. IV.-VI. 

 1850. Diaptomus Castor, Baird (7), p. 219, pi. XXVI., 



figs. 1, 2, 2a-j. 

 1863. „ ,, Lilljeborg (9), pi. XII., figs. 1-10; 



pi. XIV., figs. 1-4. 

 18G3. „ ,, Lubbock (19), p. 205, pi. 31, 



figs. 7—11. 

 1872. „ „ Frio (24), p. 225, figs. 22a, b. 



1878. ,, ,, Brady, in part (32), p. 59, pi. VI., 



figs. 6, 8, 11. 

 1889. ,, ,, Do Guernc and Richard (62), p. 11, 



fig. 1, and pi. II., fig. 1 . 



This, the first described, and for Long the only known species 



92 



