294 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
may be readily distinguished from it by the width of the 
lower portion of the cephalothorax and abdomen. It 
appeared in 8, 9, 10, 14, 15, 16, Wyse tow-nettings, and 
in 11, 16, 17, 20, Herdman series, the localities being the 
Indian Ocean, Bay of Bengal, and Red Sea. When pre- 
sent it was usually fairly abundant. It does not appear 
to have been previously recorded except by Giesbrecht 
from the Pacific Ocean, and somewhat doubtfully from 
the Red Sea. 
EXPLANATION OF THE PLATE. 
The Map, Pl. XV., shows the respective routes traversed 
by Capt. Wyse and Mr. Herdman. The figures refer to 
the stations at which the plankton was collected. 
