of the Fishery Board for Shotland. 451 
This is the first time the species has beeen observed on the east coast, 
but on the west coast it has been taken in Loch Fyne and in the Sound 
of Mull; it appears to be a very scarce species. Prof. G. O. Sars informs 
me 2m (it. that this species has long ago been found by him off the 
Norwegian coast, and that, though the female resembles somewhat the 
female of Stephus gyrans, Giesbrecht, the male (which I have not seen) 
differs very considerably from the male of the form described by that 
author. He also informs me that the name he proposes for this species is 
Stephus scotti, a full description of which will be found in vol iv of his 
work on the Crustacea of Norway, now in course of publication. 
Pseudocyclopia caudata, T. Scott. 
1894.  Pseudocyclopia caudata, T. Scott, 12th Ann. Rept. 
Fishery Board for Scot, pt. iii., p. 236, pl. v., figs. 1-8. 
This is a smaller and rarer species than Pseudocyclopia crasstcornis ; 
it has been taken in the Firth of Clyde as well as in the Firth of Forth, 
and I now record its occurrence in the deep water (60 fathoms) ahout 10 
miles off Aberdeen, where it was collected on July 30th, 1901. Im this 
species the caudal furca are distinctly more elongate than in the other 
described species. 
Atidius armatus, Brady. 
The female specimen of a copepod which I regard as identical with 
the species described by Dr. Brady under the above name in his Report 
on the Challenger Copepoda, occurred in a mid-water tow-net gathering 
collected off the east side of the Shetland Islands on May 22nd, 1901. 
Professor Sars, in his new work on the Copepoda of Norway, remarks that 
the Pseudocalanus armatus of Boeck is probably identical with the 
Aitidius armatus described by Professor G. 8. Brady, and if so, the 
name of the species would stand as Aitidus armatus (Boeck). 
Bradyidius armatus (Vanhéffen). 
1878. Pseudocalanus armatus, Brady (not Boeck), Brit. Copep., 
vol. 1., p. 46, pl. iv., figs. 1-11. 
1899. Bradyidius armatus (Vanhoffen). Vide Das Tierreich, 
p. 32. 
(2) 1884. Undinopsis Bradyi, G. O. Sars, in Sp. Schneider’s Rept. 
of Invertebrata from the Kvenangen Fjord. 
A set of drawings showing the structural differences between the male 
and female of this species, with descriptive notes, was published in the 
14th Annual Report of the Fishery Board for Scotland. It is a species 
that is of frequent occurrence in the Clyde, where it was first obtained 
by Dr. Brady many years ago, and it is also found on other parts of the 
Scottish coasts—its distribution extending to the north of the Shetland 
Islands, where it was collected on the 17th of May of the present year 
(1901). Undinopsis Bradyi, G. O. Sars, may be identical with this 
species, but it differs somewhat in the structure of the fifth thoracic feet 
of the male. 
Scolecithrix hibernica, A. Scott. 
1896. Scolecithrix hibernica, A. Scott, Ann. and Mag. Nat, 
Hist;, (6), wok I8> p: 302; pl. xvi, “ngs. 1-9); “pl. xviii. 
figs. 1-9. 
This species was obtained in Loch Etive in about 60 fathoms on 
September 17th, 1901 ; Loch Etive is a new station for this Scolecithriz, 
