of the Fishery Board for Scotland. 477 
of Podon leuckartit, and the lower branches are provided with the same 
number of setz ; but the upper branches differ in being furnished with an 
additional seta on the penultimate joint—one of the sete springs from the 
middle of the joint and the other from its distal end—this branch, there- 
fore, carries seven instead of six setze (fig. 26). 
The caudal spines are moderately stout, and straight, but smaller than 
those of Podon leuckartti (fig. 25). 
Habitat.—Firth of Clyde, not very rare. It may be readily dis- 
tinguished from Podon leuckartw by having an additional seta on the 
upper branches of the antennz and by the caudal spines being smaller 
and straight. 
Podon polyphemoides, Leuckart—a species considerably smaller than 
the other two—is, like Podon intermedius, provided with seven sete on 
the upper branches of the antennz, but the end joints of both branches 
are distinctly shorter than the preceding joints ; the supplementary seta 
on the penultimate joint of the upper branches springs from near the 
distal end instead of near the middle of the joint. The caudal spines 
are also smaller. Probably Podon leuckarti has sometimes been 
mistaken for this species.* 
Order EDRIOPHTHALMA. 
Sub-Order AMPHIPODA. 
Many species belonging to the Amphipoda have been observed in tow- 
net gatherings, in dredged material, and in the stomachs of fishes 
examined during the past year, but only some of the rare forms are 
recorded here. 
PONTOPOREIIDA. 
Bathyporeia norvegica, G. O, Sars, occurred in a tow-net gathering 
collected in Aberdeen Bay on September 4th, 1901. <Argissa hamatipes 
(Norman) was also observed in some of the gatherings collected off Aber- 
deen during the past year. 
PHOXOCEPHALIDA. 
The only species belonging to this family which may be noted is the 
Phoxocephalus oculatus, G. O. Sars; it was obtained in a tow-net 
gathering collected about 22 miles to the north of the Shetland Islands on 
May 17th, 1901. 
AMPELISCID&. 
Several species of the Ampeliscidee have been observed, not only in 
gatherings collected with the tow-nets and dredge, but also in the 
stomachs of fishes, with whom they appear to be a favourite kind of 
food. ‘The following species were observed :—Ampelisca macrocephala 
has occurred in gatherings from the Firth of Forth, from off Aberdeen, 
and from the Shetland district. Ampelisca assimilis has been obtained 
in gatherings and in fishes’ stomachs from the Firth of Forth and 
Collieston, Aberdeenshire. Ampelisca spinipes was obtained in 
dredgings from the Firth of Forth (with parasites attached) and in the 
* All the three species of Podon mentioned above have recently been obtained in some 
tow-net gatherings from the Firth of Clyde collected for the most part in April and May 
and in July and August 1901; P. leuckartiz was obtained in the spring gatherings, but not 
in those collected later ; while the other two species were observed in these later gather- 
ings only. 
