of the Fishery Board for Scotland. 457 
Ectinosoma melaniceps, Boeck, (2) var. Pl. XXII, figs. 10-16. 
1864. Letinosoma melaniceps, Boeck, Overs. Norg. Copep., p. 20. 
A few specimens of an Lctinosoma obtained in some dredged material 
from Station VI., Firth of Forth, have such a general resemblance to 
Ectinosoma melaniceps, Boeck, that though they differ in some details 
of structure they may after all be only a form of that species. The fol- 
lowing description will indicate a few of the more important points of 
difference : — 
The antennules are six-jointed, the basal jcint appears to be the 
largest, being nearly twice the length of the next one, but the others are 
comparatively small (fig. 11), . The antenne appear to be similar to those 
of Hetinosoma melaniceps. 'The mandibles and mandible-palps are 
slender (fig. 12). The other mouth organs and swimming feet are some- 
what similar to the same appendages in H. melaniceps (figs. 13, 14). 
The fifth pair of the present form have the basal joints not very broad, 
the inner produced part scarcely reaches to the middle of the secondary 
joints, and is abruptly truncate at the apex; a short and a moderately 
long seta spring from the apex, the inner seta being the longest. The 
secondary joints are sub-cylindrical, and about one and a half times 
longer than broad; they are furnished with three terminal sete, the 
middle one, which springs from a slightly produced lobe, is considerably 
longer than the other two; a small lateral hair is observed between the 
elongated middle seta and the outer one as shown in the figure (fig. 15). 
No males were observed. 
Stenhelia ima, G. S. Brady. 
1872. Canthocamptus imus, Brady, Nat. Hist. Northumb. and 
Durham, vol. iv., p. 432, pl. xix., figs. 1-5. 
This species occurred very sparingly in washings from dredged material 
collected near Inchkeith, Firth of Forth, on July 4th, 1901. Though 
Stenhelia ima is apparently widely distributed, I have not fonnd it to be 
very common. 
Stenhelia intermedia, T. Scott. . 
1897. Stenhelia intermedia, 'T. Scott, 15th Ann. Rept. Fishery 
Board for Scotland, pt. ii., p. 169, pl. i1., figs. 10-21. 
This somewhat rare species was dredged in Loch Etive in about 60 
fathoms on September 17th, 1901. 
Stenhelia hirsuta, I. C. Thompson. 
1893.  Stenhelia hirsuta, I. C. Thompson, Trans. L’pool Biol. 
Soc., vol. vii., p. 20, pl. xxi., fig. 2, d.e.f. (separate reprint). 
Specimens of Stenhelia hirsuta were occasionally observed in gather- 
ings of dredged material from the Firth of Forth collected in July, 1901. 
(1) Stenhelia hispida, G. 8. Brady. - Pl. XXIV., figs. 19-26. 
1880. Stenhelia hispida, Brady, Mon. Brit. Copep., vol. iL, 
p. 32, pl. xhi., figs. 1-14. 
Description of the Female.—Length about 1 mm. (;4, of an inch). 
The body is in general appearance somewhat similar to Stenheloa ima 
(fig. 19). 
