476 Port TI1.—Twentieth Annual Report 
The caudal lamina of the male appears to have only five spines on both 
sides (fig. 32), no trace of a sixth could be observed. 
The male described and figured here does not agree with Nematohamma 
obliqua, Brady and Norman, the structure of the antenne and of the 
secondary branches of the antennules differs considerably from that of the 
same appendages in JV. obliqua. 
No male of Sarsiella capsula appears to have been described hitherto. 
Conchecea elegans, G. O. Sars. Pl. xxv., fig. 33. 
A specimen of this species was dredged 180 miles north-east from 
Buchan-ness (about sixty miles to the east of the Shetland Islands) on 
May 22nd, 1901. Another specimen was obtained in the stomach of a 
whiting captured in 65 fathoms about 10 miles off Aberdeen on the 19th 
of the same month. 
Order BRANCHIOPODA. 
POLYPHEMEDZ. 
Genus Podon. 
Three species of Podon have been described from the North Sea viz. 
Podon polyphemoides, Leuckart, Podon leuckartii, G. O. Sars, and Podon 
intermedius, Lilljeborg, and two of these—the first and the third—have 
sometimes been included in lists of British Crustacea ; there is a proba- 
bility, however, that Podon leuckartw has sometimes been mistaken for 
P. polyphemoides, and as I have, with the assistance of Professor Lillje- 
borg’s great work on Swedish Cladocera recently published, been enabled to 
recognise Podon leuckartu in some tow-net gatherings from the Firth of 
Forth and also from the Moray Firth, I will here indicate what seem to 
be the more obvious differences between this species and Podon inter- 
medius, which is occasionally observed in the Firth of Clyde, and 
between both of these and Podon polyphemoides. 
Podon leuckartié (G. O. Sars). Pl. XXV., figs, 23, 24. 
The specimen represented by the drawing measures about a millimetre 
in length. The lower branches of the antennz are composed of three, the 
upper of four joints as in the other two species referred to above; the 
joints of the lower branches are sub-equal in length, and the first two bear 
each one and the last four terminal sete, the first joint of the upper 
branches is very small, but other three are larger and sub-equal in length, 
eS are provided with the same number of sete as the lower branches 
fig. 24). 
The caudal spines are strong and slightly curved, and are rather longer 
than the caudal spines of Podon intermedius. 
Habitat.—Firth of Forth and the Moray Firth. 
The species does not appear to be rare on the east of Scotland: it has 
probably been mistaken for Podon polyphemoides. 
Podon intermedius, Lilljeborg. Pl. XXV., figs. 25, 26. 
1853. Podon intermedius, Lilljeborg, De Crust. ex ordinibus 
Pee Cladocera, Ostrocoda, Copepoda, in Scania occurr., sec. 
; da Crust. Marina, Ord. Clad., p. 161. — 
The specimen represented by the drawing measures about 15mm. The 
antennae (second antennz) are somewhat similar in structure to those 
