History of British Entomostraca. 329 
second terminated by five setae, the three internal being longest, and 
having a joint near the middle of their length. The mandibles appear 
to resemble very much those of minutus, the teeth, however, being 
more distinctly seen ; and the barbillons of lips are also very like 
those of preceding species ; but, from the rigidity of the parts in the 
specimens from which my figures were taken, I could not sketch 
these minute organs properly. Hands (Fig. 18) of three articula- 
tions j the first one long ; the second short, thick, and curved ; the 
third being a strong curved hook, the two latter together having the 
appearance of a very strong claw. First pair of feet (Fig. 19) con- 
sist of two unequal stalks arising from a common base ; superior 
stalk (a) the longer of the two, composed of two nearly equal stalks 
serrated on upper edge ; the second terminating in three short hooks ; 
the inferior stalk (6) also of two articulations, the first of which is 
much the longer of the two, and serrated, the second being very short, 
and terminating in two curved hooks. The three other pairs of 
feet (Fig. 15 and 20) consist, each stalk, of three articulations, fur- 
nished with long hairs, one or two of the long terminating ones be- 
ing finely serrate ; external stalk (a,) as in minutus, larger and 
longer than internal ; all three pairs of feet resemble each other. 
Supports or fulcra (Fig. 21 ) consist, each, of a broad fiat body, round- 
ed at one side, and furnished with several pretty long finely serrat- 
ed setae ; the opposite side giving off an appendage or finger, also 
provided with several serrated setae. This species I have named 
chelifer ; but it differs from the figure and description of Muller's 
chelifer in so many points, that in a paper upon the Berwickshire 
Entomostraca, read before the Berwickshire Naturalists' Club, and 
since that, published in their Transactions, I made a distinct species 
of it, and named it Cyclops Johnstoni. Upon more minute exami- 
nation, however, I have again changed its name, restoring to it that 
of Muller, as it approaches, notwithstanding its discrepancies, suf- 
ficiently near that species of his, to be identified with it. In Mul- 
ler's species, he says there are no articulations to the body, which 
he describes as " farciminis facie," and there are only three articu- 
lations to the antennae. These characters are so much at variance 
with the analogous portions of the body in all the other species, 
that, as he mentions it as a rare species, it is most probable Muller 
must have made some mistake with regard to them. Some differ- 
ences also exist in the first pair of feet, and the length of the caudal 
setae but they agree so well in the very characteristic hands, in 
the beaked head, c, that I have now no hesitation in referring my 
species to Muller's chelifer. 
