72 COPEPODA MONOPS, OITIIOXA 



Plankton-type. Noted from the southern Pacific (40° S. 133° 

 W.). It follows in the Atlantic the Equatorial Current from Africa 

 to the north of S. America, enters the Caribbean Sea and the Flo- 

 rida Current. Like many other species of the desmo-type it advan- 

 ces in July beyond 40° N. in the western Atlantic. — D. 



MONOPS BREVIS Giesbr 



1898 November: Rio Janeiro, very rare, (Q cf). 



Temperature: 22. 



Salinity: 33. si. 



Plankton-type. Noted from W. Australia only. — Nt. 



MONOPS PERSPICAX (Dana.) 



1898 March: 10° N. 20° W. 

 August: 25° N. 74° W. 

 September: 12° N. 51° W. 



Temperature: 27. i, mean of 3 obs,, max. 28, min. 26. 



Salinity: 36. 21 and 36.33. 



Plankton-type. Noted from the eastern equatorial Atlantic. 

 From the above statements it is apparent that this species follows 

 the Equatorial Current from Africa to S. America and enters the 

 Antilles Current. — D. 



OITHONA BREVICORNIS Giesbr. 

 1898 February: 6° S. 12° E., mouth of Congo River. 



Temperature: 26.2. 



Salinity: 20.2!.. 



Plankton- type. Noted from Hongkong only. — Xt. 



OITHONA PLUMIFERA Baird. 



1898 Januarij: 7° N. 53° W.; 25°— 35° N. 74°— 75° W.; 21° N. 

 17° W. 

 Februartj: 13° N. 70° W. to 30° N. 74° W.; 5° S. 4° E. 



