of the Fishery Board for Scotland. 113 
inner edges of both the inner and outer branches have the basal half 
distinctly thicker than the distal portion, so much so as to be observable 
without dissection (fig. 15). 
This species has also been obtained in the Moray Firth and in the 
Firth of Forth as well as in the Clyde, but seldom more than one or two 
specimens have been noticed in any single gathering. 
Genus Labidocera, Lubbock (1853). 
Labidocera wollastont, Lubbock. 
1857. Pontella wollastoni, Lubb., Aun. Nat. Hist. (2), vol. 20, 
p. 406, pl. 10, 11. 
This somewhat rare species was captured in Loch Fyne with the surface 
tow-net at Station XIII. (off Largymore), October 9, 1901. It also 
occurred in a bottom tow-net gathering collected at Station XIII., near 
the mouth of the Clyde estuary, on November 11, 1901. Inthe gathering 
at Station VIII. there were also obtained Candacia pectinata, Metridia 
lucens, Parapontella brevicornts, and other forms. 
Fam. Harpacticip@. 
Genus Lctinosma, Boeck (1864). 
Ectinosma curticorne, Boeck. PI. vi., fig. 1. 
1885. Lctinosoma eurticorne, Boeck, Abhandl. Natur. Vereins zu 
Bremen, ix. Bd., p. 194, t. vi., figs. 1-12. 
1895. Ectinosoma curticorne, T. and A. Scott, Trans. Linn. Soc., 
vol. vi. (Zool.), p. 430, pl. 36, figs. 22, 30, 34, et. seq. 
This is a marine species, and though recorded from several British 
localities it does not appear to be anywhere very common ; it is, however, 
more frequently met with amongst the fronds and roots of alge in the 
littoral zone than in off-shore waters. It is usually of a brownish colour, 
and there is also usually a dark-coloured blotch at the bases of the 
antennules, such as is observed in Bradya minor, but in that species the 
outline of the blotch is more distinctly defined. Specimens of this species 
have been obtained in gatherings collected some years ago in shallow 
water near Musselburgh and Granton, Firth of Forth, but which have 
only recently been examined. In this species, as in one or two others, 
the furcal joints are each provided at the apex with a short but stout cone- 
shaped spine and with two other short sete which are moderately stout 
and spiniform, as shown in the drawing (pl. vi., fig. 1). There are also, as 
in other Harpactids, one or two elongated terminal set, the principal of 
which is moderately stout. 
A few other Ectinosomas were obtained in the Musselburgh gatherings 
along with Z. curticorne, two of which may be referred to here, viz. E. 
gracile and FE. herdmant. Ectinosoma gracile, T. and A. Scott, is a small 
and slender form which was first discovered near St. Monans, Firth of 
Forth, and has since been found sparingly in several British localities. 
This species was moderately frequent in one of the gatherings from 
Musselburgh. ctinosoma herdmant, T. and A. Scott, though a 
larger furm than the last, is also moderately slender, and was also first 
observed near St. Monans. Most of the Ectinosomas require careful 
examination, but this is one of a few that are comparatively easily 
identified. This species was one of the more common Harpactids in the 
Musselburgh gatherings ; it is readily noticed by its elongated slender 
form and the opaque white colour it assumes when preserved in spirit. 
H 
