oj the Mshery Board for Scotland. 
26J 
basal part (from the end of which spring two subniarginal plumose seta*) 
and a strong claw-like tooth armed with a few seta? on its outer aspect, 
as shown in the ligure. Maxillae well developed, the biting part 
with three apical processes, finely serrate on the margin, the palp with 
several terminal plumose setae. Second foot-jaw strong, two-jointed, last 
joint broadly triangular, the iuner margin armed with a double row of 
small teeth, terminal claw stout, curved, as long as the joint from which 
it springs, and forming with it a powerful grasping organ ; the first joint is 
provided with a stout plumose seta on the inner margin. Both branches 
of the first four pairs of swimming feet three-jointed and nearly alike ; 
the outer branch rather shorter than the inner. The fifth pair broadly 
foliaceous, truncate at the end, and furnished with four stout terminal 
hairs ; both the margins are ciliated. Abdomen five-jointed, the first 
segment considerably larger than the next, and armed with two short 
unequal spines at the postero-distal angles ; the last four segments 
gradually decrease in length and breadth. Caudal stylets short and broad, 
about as long as the last abdominal segment, and furnished with one long 
and two short terminal plumose setae and three very short hairs. 
Habitat. — Vicinity of Culross, on the north side of the Forth. One 
specimen only was obtained. The remarkable form of the posterior foot- 
jaws, so closely resembling the Gnathopods of some of the Amphipoda, and 
the broad fifth pair of swimming feet, enable the species to be readily 
distinguished. A full-sized drawing of the animal was to have been 
prepared, but unfortunately the cover-glass of the slide on which the 
Copepod was mounted preparatory to being figured was accidentally 
pressed down so that the thorax became abnormally flattened ; for this 
reason a correct full-sized drawing could not be prepared. 
Lichomolgus concinnus* n. sp. (provisional name). (PI. XI. figs. 25-23). 
Female. — Length, exclusive of caudal setae, *9 mm. Cephalo-thorax 
broadly ovate. Abdomen short, narrow, four-jointed, first abdominal 
segment large, longer than the following three together, and as broad as 
long, the postero-lateral angles not produced nor furnished with spines. 
Caudal stylets stout, about as long as the last abdominal segment, and 
provided each with one marginal and four terminal setae. Forehead 
rounded. Anterior antennae shorter than the first cephalo-thoracic 
segment, seven-jointed, sparingly setiferous, the proportional length of 
the joints as in the formula 
12 • 28 • 7 ' 18 • 15 • 12 • 7 
1- 2-3* 4- 5* 6-7* 
A short olfactory filament springs from near the middle of the fifth joint. 
Posterior antennae stout, four-jointed, and armed with a short and strong 
terminal claw ; the second joint is longer than the next two together, the 
third is small. There is no secondary branch. The anterior foot-jaw is 
in the form of an elongate curved spine, having a dilated base and a 
long slender extremity; it resembles in form and marginal pectination 
the anterior foot-jaw of Lichomolgus liber. Posterior foot-jaw three- 
jointed, similar to that of L. thorellii. Second joint dilated and bearing 
two slender spines ; the last joint smaller, with two stout terminal spines, 
one of which is setose. The first three pairs of swimming feet as in L. 
liber, the inner branch of the fourth pair two-jointed, the second joint 
twice as long as the first. The foot of the fifth pair consists of a stout 
cylindrical joint bearing two elongate terminal hairs, which are articulated 
near the base ; ovisacs two. No male has been observed. 
Habitat.— Off St Monans, Firth of Forth. Rare. 
* Ooncinnus, neat. 
