255 Part I[I.—Seventeenth Annual Report 
Mandibles as in Canthocamptus, mandible-palp one-branched, and 
furnished with a few sets; the basal joint is armed with a moderately 
stout apical spine (fig. 15). Other mouth organs as in Canthocamptus. 
First pair of swiraming feet with both branches moderately short, and of 
nearly the same length; the outer branches are three-jointed, but the 
inner are composed of only two joints, as in Attheyella ; the first joint of the 
inner branch is about equal in length to the first two joints of the outer 
branches, and is also somewhat stouter; the second joint is little more 
than half the length of the first one (fig. 16). 
The second, third, and fourth pairs of swimming feet have both 
branches three-jointed ; the outer branches are considerably longer than 
the inner; in the fourth pair the inner branches are only about a third 
of the length of the outer branches (fig. 17); the first joint of the inner 
branches of the fourth pair are very small; the outer branches are 
furnished with long terminal sete. The fifth pair are small and folia- 
ceous ; and the inner portion of the basal joint is considerably produced, 
and is subcylindrical in outline ; the apex is subtruncate and bears four 
setae, the two inner ones being small, while the other two are elongate ; 
the secondary joint is ovate, and furnished with several sete on the 
outer margin and apex. All the sete are of considerable length, except 
a small one near the base of the outer margin (fig. 18). Caudal furca 
short, and about as broad as long (fig. 19). 
Habitat.—Shore between Fairlie and Hunterston, Firth of Clyde, 
Rather rare. No males have been observed. 
Remarks.—The Copepod just described resembles more or less closely 
not only Canthocamptus, but also Attheyella and Mesochra. It differs 
from the typical Canthocamptus in having the inner branches of the 
first pair of swimming feet only two-jointed, while the inner branches of 
all the next three pairs are three-jointed. It also differs from Attheyella 
and Mesochra in having the inner branches of the second, third, and 
fourth pairs three-jointed, though agreeing with these two genera in the 
structure of the first pair. Moreover, it somewhat resembles Nztochra in 
the antennules being distinctly bent at the second joint ; but in that genus 
all the first four pairs of swimming feet have the inner branches three- 
jointed. 
Psyllocamptus fairliensis seems to form one of the links in a chain of 
Copepods that at the one end terminates in Mesochra, which has the 
inner branches of all the four pairs of swimming feet two-jointed, and at 
the other end in Nitochra, which has the same branches all three-jointed. 
The generic name is derived from the two Greek words psylla—-a flea, and 
kamptos—fiexible. 
Huntemannia jadensis, 8. A. Poppe. 
1884. Huntemannia jadensis, Poppe, Abhandl. d. nat. Ver. 
Bremen, Bd. IX., p. 59. 
1885. Huntemannia jadensis, Poppe, Die freilebenden Copep. 
des Jadebusens, op. cit., Bd. XL, p. 167, Pl. VIL, figs. 10-20 
1895. Huntemannia jadensis, T. and A. Scott, Ann. and Mag, 
Nat. Hist: (6), ,vol..xvp-.0, Pl. VI, figs: Bi 22: 
This species was described by Dr. Poppe in 1884. It was first detected 
in Scotland in 1894, in brackish water pools, at the head of West Loch 
Tarbert (Cantyre), and a record of its occurrence there was published in 
the “ Annals and Magazine of Natural History ” for 1895, but up till the 
present time this appears to be the only record of its occurrence in Scotland. 
On 4th November 1897, Mr. F. G. Pearcey collected a gathering of 
