1028 CLEVE, P. T., PLANKTON FROM THE RED SEA. 



Labidocera acutum (Dana). — Assab (Giesbr.). I noted 

 this species from the Arabian Sea and the Malay Archipelago. 

 — Indian Ocean, Hongkong, Pacific (Giesbr.). 



L. miimtiim GlESBR. — AsSAB (GlESBR.). — I noted this 

 species from the Arabian Sea. Giesbrecht mentions it also 

 from Hongkong. 



L. Orsinii GlESBR, — AsSAB (GlESBR.). — I found this 

 species in saraples from the Malay Archipelago. 



L. pavo Giesbr. — Assab (Giesbr.). — I noted this spe- 

 cies from the Malay Archipelago. 



Microsetella atlantica Brady & Robts. — 22° N. 37° E. 

 (temp. 23,65; sal. 39,5). Arabian Sea, Indian Ocean, whole 

 Atlantic. Pacific (Giesbr.). 



Oithoiia plumifera Baird. — 13'— 22° N. 43° — 37 E. (temp. 

 23,65 to 24,8; sal. 36,35 to 39,5). Arabian Sea, Indian Ocean, 

 Atlantic (33° S. — 6G° N.), Mediterranean. Pacific Ocean (Giesbr.). 



Oncsea conifera GlESBR. — 16" N. 41" E. {temp. 24,5; saL 

 37,41). I noted this species from the Malay Archipelago, where 

 it is rather common. Pacific, Mediterranean (Giesbr.). North 

 Siberian Island (G. 0. Sars). North Atlantic, 62° — 71° N., in 

 deep water. 



0. media GlESBR. — 16° — 19° N. 42° — 39° E. (temp. 24,5- 

 to 25,5; sal. 37,41 to 38,8). This species occurs in the Arabian 

 Sea, Indian Ocean and Malay Archipelago, according to Giesbr. 

 in the Mediterranean and Pacific. It is common in the whole 

 tropical Atlantic. 



0. mediterranea (Claus.). — 13° N. 43' E. {temp. 24,8; 

 sal. 36,35). Arabian Sea, Indian Ocean. Pacific, Mediterranean, 

 Atlantic (Giesbr.). Franz Josef Land (Th. Scott). 



0. venusta Philippi. — 16 — 19° N. 41° — 39° E. {temp, 

 24,5 to 25,5; sal. 37,41 to 38,8). Arabian Sea, Atlantic. Me- 

 diterranean, Pacific (Giesbr.). 



Paracalanus aciileatus GlESBR. — 16° N. 41° E. {temp. 24,5; 

 sal. 37,41). AssAB (Giesbr.). Rather common in the Arabian 

 Sea and Indian Ocean. Pacific (Giesbr.). Tropical Atlantic. 



