of the Fishery Board for Scotland. 249 



Neobradya pectinifer*, nov. gen. et sp. (provisional name) (PL XIII. 

 figs. 19-32). 



Female. — Body elongate, cylindrical ; length, exclusive of caudal stylets, 

 1*2 mm. and composed of nine segments. The first cephalo-thoracic 

 segment longer than the next two together. Rostrum short, obtusely 

 rounded. Anterior antennae nine-jointed, about as long as the first body 

 segment, stout, and well furnished with setae • the proportional length of 

 the joints are as shown by the formula 



13 ' 22 • 10 • 5 • 3 ' 4 ' 3 • 2 • 5 

 1 ; 2- 3-4-5-6'7'8'9° 



One side of the fourth joint is produced to form the base of a long olfactory 

 appendage. Posterior antennae large, three-jointed, the extremity of the 

 last joint furnished with one plain and five plumose hairs \ the secondary 

 branch is four-jointed ; the first joint is as long as all the other three 

 together ; the first joint bears two setae, the second and third one setae each, 

 and the last two very small marginal and two long terminal setae. The 

 mandible is well developed, having a broad biting part and a large two- 

 branched palp — one of the branches is four-, the other one-jointed • both 

 the basal part and the branches of the palp are furnished with setae. 

 Maxillae nearly as in Longipedia coronata. Anterior foot-jaw stout, five- 

 jointed, the first joint large and possessing three marginal digitiform lobes, 

 each of the lobes with three strong, nearly equal terminal hairs, the second 

 joint much smaller than the first, and produced to form a stout process 

 similar to those on the first joint, and also, like them, provided with three 

 stout, subequal, terminal hairs ; the three last joints are very small, and 

 furnished with four moderately long hairs. Posterior foot-jaws very small, 

 three-jointed, armed with several appressed and short, stout, blunt- 

 pointed, marginal spines, each of which is furnished with a fringe of short 

 hairs arranged in a pectinate manner along the upper margin (fig. 27). 

 All the swimming feet two-branched and nearly alike in both sexes. 

 Both branches of the first pair of nearly equal length and three-jointed, 

 the second, third, and fourth pairs have the outer branch three-jointed ; 

 the inner branch, which is rather shorter, is two-jointed, the first joint 

 of both branches of the first four pairs longer than any of the other joints ; 

 the second joint of the basal part of each of the four pairs is very short, 

 that of the first pair armed with a spine on the inner distal angle ; that 

 of the second, third, and fourth pairs provided with a small setae insteau 

 of a spine ; the last joint of each branch of all the four pairs is furnished 

 with one or two long plumose setae and one or two smaller hairs. Fifth 

 pair of feet small, foliaceous, the produced inner portion of the basal 

 joint rather smaller than the outer semicircular joint, and provided with 

 two elongate, stout, plumose setae of unequal length. The exterior lobe 

 of the same joint bears a very long, slender, curved hair at its apex. A 

 long, stout, plumose hair springs from the inner distal angle of the outer 

 semicircular joint, and three others from its outer margin. Abdomen 

 four-jointed, the first and third segments longer than either of the other 

 two. Caudal stylets short and furnished with a long slender terminal 

 hair and several very small ones. 



Male. — The male differs little from the female except in the form of 

 the anterior antennae which are distinctly geniculated and form powerful 

 grasping organs (fig. 22). 



Habitat. — Off St Monans, Firth of Forth. Obtained from dredged 

 material from 14 fathoms water. 



* Referring to the comb-like arrangement of the hairs on the_ marginal spines of 

 the posterior foot-jaws. 



