1-10 COPEl'ODA. 



Stiireross, June 23rcl, 1884 ; Falmouth, June 30th, 1889 ; 

 and in gatherings from the following places collected in 

 May and August, 1903 : Padstow, Cornwall, very rare ; 

 2i miles off the Breakwater, Plymouth ; Plymouth Sound ; 

 and near Mewstone Ledge, Plymouth. 



CLYTEMNESTRA ROSTRATA (G-. S. Brady). 



1883. Goniophyllus rostmtus, G. S. Brady, Kept. 'Challenger' 



Copepoda, p. 107, pi. xlii. figs. 9-10. 

 1892. Clytemnestra rostrata, Giesbrecht, pp. 566 & 734, pi. xlv. 



figs. 19, 20, 22, 25, 26, 31, 33. 



This species was found by A. M. N. in a gathering 

 from the Cattewater, Plymouth, collected August 1889. This 

 appears to be the first British capture of the species. It 

 has since been taken in the tow-net by Dr. Gough near 

 the Eddystone and elsewhere off the coast. 



EOBERTSONIA TENUis (Brady & Robertson). (PI. XX. 

 figs. 9-11 ; PI. XXI. fig. 6.) 



1876. Ectinosoma tome, Brady & Robertson, Rep. Brit. Assoc. 



(1875) p. 196. 

 1880. Robertsonia tennis, Brady, vol. ii. p. 25, pi. xli. figs. 1-14. 



Rolertsonia temiis is a small but moderately robust species, 

 with somewhat hispid segments. 



The antennules of the female (PI. XX. fig. 9) are stout and 

 composed of only five joints, and furnished with numerous 

 stout setse, several of which are plumose. 



The antennas have the secondary branches three-jointed, 

 but the middle joint is very small. 



The first four pairs o thoracic feet have both branches 

 three-jointed. The inner branches of the first pair are only 

 slightly longer than the outer, and the first joint is more 

 robust than either of the next two ; the outer branches are 

 moderately stout. The drawing (PL XX. fig. 11) shows the 

 form and arrangement of the armature of this pair. 



In the other three pairs the outer branches are longer than 

 the inner ones. 



The fifth pair (PL XXI. fig. 6) are foliaceous and two- 

 jointed ; the primary joint is broadly subtriangular and 

 provided with fine setiu on the distal half of the inner margin 

 and apex ; the secondary joint, which is broadly ovate, 

 scarcely reaches beyond the extremity of the primary joint 

 and bears six setaj arranged as shown in the drawing. 



^j *~J 



The furcal joints are very short. 



In gatherings from Salcombe, 1875, and in Plymouth 

 Sound, near Chequer Biiov and Jenny Cliff Bay, in August 

 1903. 



