110 Part [II.—Twenty-first Annual Report 
The number of Crustacea described in the present paper is scarcely 
so large as in some of those previously published, 
Tam, as formerly, indebted to my son Mr. Andrew Scott, A.L.S., for the 
drawings required to illustrate the new and rare species described here ; 
and the arrangement of the species is similar to that adopted in previous 
papers. 
CRUSTACEA. 
Sub-Class ENTOMOSTRACA. 
Order I.— COPEPODA. 
CALANOIDA. 
Genus Hucalanus, 
Eucalanus crassus, Giesbrecht, 
1881. Eucalanus crassus, Giesb., Atti. Acc. Lincei Rend., ser. 4, 
vol. 4, lem. 2, p. 333. See also Pelagisch. Copep. Golfes 
von Neapel, pp. 1381-152, t. 11 and 35. 
Several specimens of this species were captured about 10 miles off 
Aberdeen on November 6th, 1901. This is the first time that Hucalanus 
crassus has been taken so far south on the east side of Scotland. The 
species has been several times captured in the Moray Firth,* and it has 
also been collected along with Hucalanus elongatus about fifty miles 
south-east of Fair Island.t Dr. R. Norris Wolfenden records it from the 
Farde Channel, where he has also taken several other interesting species.t 
Genus Stephos, T. Scott (1892). 
Stephos scotti, G. O. Sars. Pl. ii, figs, 1-4. 
1897. Stephos gyrans, T. Scott (not Giesbrecht), 15th Ann. 
Rept. Fishery Board for Scotland, pt. iii., p. 146, pl. iv., 
fic, 9; pl. iii, figs. 17-18. 
1892. Stephos scotti, G. O. Sars. An Account of the Crustacea 
of Norway, vol. iv., p. 63, pl. xliii. 
This species was first observed in some material dredged in 1896 in 
Loch Gair—a small lagoon opening into Loch Fyne. Only a single 
female was obtained on this occasion, and, as it had a somewhat close 
resemblance to Stephos gyrans, Giesbrecht, it was ascribed to that 
species. Additional female specimens were subsequently obtained not 
only in other parts of the Clyde area but also in the Firth of Forth, but 
till quite recently no males had been observed among Scottish specimens. 
Prof. G. O. Sars, however, had already obtained both sexes of the species 
in Norwegian waters, and had found that the males especially differed 
considerably from the males of Stephos gyrans, and, therefore, in vol. iv. 
of his great work on the Crustacea of Norway described it under the 
name given above. 
It happened that I had a gathering of small Crustacea which had been 
collected in 1894 in an old quarry near Granton to which the tide has 
access during high water. This gathering, which was examined during 
* Highteenth Annual Report of the Fishery Board for Scotland, Part III., p. 382 (1900). 
+ Nineteenth Annual Report of the Fishery Board for Scotland, Part I1I., p. 237 (1901). 
Journ. Marine Biol, Assoc., vol. vi., No. 3 (January, 1902), p. 361, 
