TROPICAL PLANKTON. 985 
in the Red Sea. Both habitats are an addition to its 
recorded range. 
Microsetella atlantica, Brady & Robertson. 
1873. Microsetella atlantica, Brady & Robertson, Ann. and Mag. Nat. 
Hist., Ser. 4, vol. XII., p. 180, Pl. 1X., figs. 11—16. 
This species has a much wider range than the last, — 
being found in 15 of the Wyse gatherings and 5 of the 
Herdman series, and thus extending its recorded range 
over the Indian Ocean and Bay of Bengal. Brady and 
T. Scott have both reported it from the South Atlantic, 
and it is not uncommon on our own western coasts. 
Euterpe acutifrons, Dana. 
1847. Harpacticus (?) acutifrons, Dana, Proc. Amer. Acad., Boston, 
vol. I., pp. 150—154. 
This minute species is common to cold and warm 
waters, being frequently found about our own coasts, and 
throughout the Mediterranean and in the South Pacific 
Ocean. It occurred at 15 and 18 stations, Wyse collec- 
tion, and at 4, 8, 15, 16, 21, 22, Herdman stations, thus 
adding the Indian Ocean and Bay of Bengal to its known 
range of area. 
Setella gracilis, Dana. 
1852. Setella gracilis, Dana, Crus. U.S. Expl. Exped., p. 1198, Pl. 
LXXXV., figs. 3 a—g. 
This striking southern species was widely distributed 
throughout both collections, and was in especial profuse 
abundance in the Sea of Babel Mandeb in both, the 
latter being an extension of its known area. In the 
Herdman collection it extended into the Red Sea and the 
Mediterranean, both localities previously recorded. 
Brady, in his “Challenger” Report, mentions it as 
common in many parts of the Pacific Ocean. 
