142 LIVERPOOL BIOLOGICAL SOCIETY. 
considerably mutilated. Although clearly an Acartia, it 
differs strikingly from the other known species of that 
genus, and may be at once distinguished by the verrucosity 
or roughened appearance of the sete, and by the fifth 
swimming feet of both sexes, and the abdominal stylets 
of the female. | 
Ajtidius armatus, Brady. 
Several specimens of this easily distinguished species 
occur at different periods. It appears to be a species of 
wide geographical distribution, but has not I believe been 
previously recorded as occurring in the Mediterranean. 
Temora dubia, Lubbock. 
Common throughout the gatherings. 
Centropaaes brachiatus, Dana. 
C. typicus, Kroyer. 
C. violaceus, Claus. 
Of these three species. C. violaceus was much the most 
plentiful, occurring in fair abundance during all seasons. 
The richness of the violet colouring in the plumose sete is 
very striking. 
Isias clavipes, Boeck. 
A few specimens only were found. 
Phaéna spinifera, Claus. 
A few specimens only, male and female, were found of 
this species ; it has not I believe been recorded away from 
the Mediterranean, Messina being the habitat of Dr. 
Claus’s specimens. 
Lucullus acuspes, Giesbrecht. 
Occurs very sparingly. 
