of the, Fishery Board for Scotland. 261 



basal part (from the end of which spring two submarginal plumose setae) 

 and a strong claw-like tooth armed with a few setae on its outer aspect, 

 as shown in the figure. 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 inner 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-z3). / *S 



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 

 I • 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.— OK St Monans, Firth of Forth. Rare. 



* Concinnus, neat. 



