of the Fishery Board for Scotland. 396 
we know of the distribution of this species tends to show that it is more 
or less restricted to brackish water. 
Ilyopsyllus cortaceus, Brady and Robertson. 
1873. Ilyopsyllus coriaceus, B. & R., Ann. and Mag. Nat, Hist. 
(4), vol. xii., p. 132, Pl. IX., figs. 1-5. 
I have to record the occurrence of this small but interesting species 
from the Cromarty Firth. It was obtained in a brackish-water pool at 
the mouth of the River Alness in the summer of 1893, and only one 
specimen was observed. It was not recorded at that time, as 1t was 
expected that other specimens might be found, when a description with 
drawings of the species would have been prepared. No more specimens 
have, however, been discovered, and I now therefore place on record the 
solitary specimen obtained, which appears to be a female. 
Quite recently the Rev. A. M. Norman very kindly presented me with 
a few specimens of this species collected by himself at Birterbuy Bay, 
Treland, in 1874. These at first sight looked asif they belonged to another 
species, for, instead of the broad spathulate furcal setz referred to in 
Prof. G. 8. Brady’s description and figures, the principal furcal sete were 
long and slender; but this, it was afterwards found, was merely a sexual 
difference, the specimens I had received from Dr. Norman being males, 
whereas the Cromarty Firth specimen, like that described by Prof. 
Brady, was a female. Moreover, it was observed that a form of 
Ilyopsyllus, which, in my report on some Entomostraca from the Gulf of 
tuinea, I had described under the name of Jlyopsylius affinis, resembled 
so closely these Birterbuy males that it is probably only a southern 
form of Ilyopsylius coriaceus. ‘The Gulf of Guinea specimens were 
obtained in a shore-gathering collected at the Island of Sao Thome. 
These Copepods, are strongly gibbous on the dorsal aspect, and the 
peculiar spathulate furcal setze of the female of L/yopsyllus coriaceus serve 
to distinguish it readily from its congeners. 
Scutellidium tisboides, Claus. 
1866. Scutellidiwm tisboides, Claus, Die Copep.-Fauna v. Nizza, 
p. 21, t. iv., figs. 8-15. 
This somewhat rare copepod has been obtained at various times in 
shore-pools between tide-marks at Bay of Nigg, Aberdeen. The species 
does not appear to be very rare in some of the gatherings obtained here. 
On the other hand, I have as yet failed to obtain it in the Firth of Clyde, 
and neither Mr. Robertson nor Prof. Brady appear to have observed it 
there ; neither do | remember of its having been observed by us in the 
Firth of Forth—probably its distribution is local rather than rare. The 
colour of the Bay of Nigg specimens was generally not very pronounced ; 
some were colourless, but usually they were tinged more or less with a 
light brownish pigment. 
Clausia cluthce, T. and A. Scott. 
1896. Clausia cluthe, T. and A. Scott, Ann. and Mag. Nat. 
iste (6) voli xvilite pa oP EY fog) L212: . 
Several specimens of this curious copepod have been obtained in 
dredged material from Tarbert Bank, Lower Loch Fyne. Though this is 
apparently the first time that Clawsia cluthe has been recorded from 
Loch Fyue, it is not the first time for the Clyde generally ; the specimens 
from which the species was described were discovered in Ayr Bay in 
