COPEPODA COLLECTED IN MALTESE SEAS. 145 
represents the same species as the Maltese specimens. 
There does not now seem sufficient reason for separating 
the species from Pontella, as proposed by Claus. 
The variety and abundance of the genus Pontella found 
about Malta form a striking contrast to the waters about 
the Canary Islands, where during a series of tow-netting 
operations which I undertook last spring* not a single 
species of Pontella was found. 
Family CycLopip@, Baird (in part). 
Oithona spinifrons, Boeck. 
O. challengeru, Brady. 
O. plumifera. 
A number of specimens of each species were found, but 
all appear to have been collected during the summer 
months, a fact which I have observed to be general in 
regard to O. spinifrons occurring in British waters, 
although very occasionally taken in winter. 
Family HARPACTICIDE, Claus. 
Gontopsyllus rostratus, Brady. 
One specimen only, a male, of this striking species was 
found, being taken by the tow-net at the close of last year 
(1887). Dr. Brady records the only other instance in 
which it was found, also a male, by the ‘“ Challenger”’ 
expedition in the Atlantic Ocean, near South America. 
Peltidium purpurewm, Phillipi. 
Several specimens of this species of a brilliant red colour 
occur in the gatherings both of July and October of last 
year; the Mediterranean being its original habitat. It has 
* Described in a paper read before the Linnean Society, 17th November, 1887, 
10—2 
