of the Fishery Board for Scotland. 457 



Ectinosoma melaniceps, Boeck, (?) var. PI. XXII., figs. 10-16. 



1864. Ectinosoma melaniceps, Boeck, Overs. Norg. Copep., p. 20. 



A few specimens of an Ectinosoma 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 joint appears to be the 

 largest, being nearly twice the length of the next one, but the others are 

 comparatively small (fig. 11). The antenna? appear to be similar to those 

 of Ectinosoma 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 E. 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 setae, 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. 1.5). 

 No males were observed. 



Stenhelia ima, G. S. Brady. 



1872. Canthocamptus imus, Brady, Nat. Hist. Northumb. and 

 Durham, vol. iv., p. 432, pi. 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 found it to be 

 very common. 



Stenhelia intermedia, T. Scott. 



1897. Stenhelia intermedia, T. Scott, 15th Ann. Rept. Fishery 

 Board for Scotland, pt. iii., p. 169, pi. ii., 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, pi. 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. 



(?) Stenhelia hispida, G. S. Brady. PI. XXIV., figs. 19-26. 



1880. Stenhelia hispida, Brady, Mon. Brit. Copep., vol. ii., 

 p. 32, pi. xlii., figs. 1-14. 



Description of the Female. — Length about 1 mm. (^ of an inch). 

 The body is in general appearance somewhat similar to Stenhelia ima 

 (fig. 19). 



