of the Fishery Board for Scotland. 251 



joints, as shown by the annexed formula, which indicates approximately 

 the proportional lengths of all the joints : — 



7-7-11 • 4 • 2 • 8 • 

 1 • 2 ■ 3 • 4 • 5 ' 6 ' 



Posterior short and stout. Secondary appendage represented by a single 

 small plain seta which springs from near the middle of the first joint. A 

 small plumose seta springs from exterior margin of the same joint (fig. 20). 

 Mandibles armed with a number of spiniform teeth, the middle one being 

 larger than the others. Palp small, one-jointed, provided with one marginal 

 and two terminal plumose setae ; and a peculiar appendage, bifid at the apex, 

 springs from a small marginal lobe (fig. 21). Posterior foot-jaws very 

 small, with a slender terminal claw. The inner branches of the first pair 

 of swimming-feet are composed of two nearly equal joints, the second one 

 being only slightly longer than the other. The inner branches are about 

 two-thirds of the length of the outer three-jointed branches. A stout setose 

 spine springs from the inner distal angle of the second basal joint (fig. 22). 

 Inner branches of the fourth pair small, scarcely equal in length of the first 

 joint of the outer three-jointed branches, and composed of two joints, the 

 first joint shorter than the other. All the swimming-feet are short and 

 stout. Basal joints of the fifth pair small ; the produced interior portion is 

 rather short and narrow, and provided with three stout setae — one marginal 

 and two terminal. A slender seta, articulated near the middle, springs from 

 the exterior angle. Secondary joints elongate, narrow, sub-cylindrical, bear- 

 ing a stout terminal seta and two smaller marginal setae, all three being 

 plumose (fig. 25). Caudal stylets moderately stout, rather longer than the 

 last adominal segment. Each stylet is furnished with a small seta near the 

 middle of the outer margin in addition to a few terminal setae. 



Habitat. — Largo Bay. Not unfrequent. 



Remarks. — This species resembles Enhydrosoma curvata in general 

 appearance, but in structural details it is clearly a Cletodes. 



* Genus Pontopolites, nov. gen. 



Animal somewhat resembling Dactylopus in general form. Anterior 

 antennae five-jointed ; shorter than the first body segment. Posterior 

 antennae like those of Cletodes, but the secondary branch is two-jointed. 

 Mandible-palp small ; composed of a distinct basal part and two small one- 

 jointed branches, the posterior one being rudimentary, or nearly so. Maxillae 

 and anterior and posterior foot-jaws as in Cletodes. First pair of swim- 

 ming-feet somewhat similar to those of Attheyella pygmxa (G. 0. Sars) 

 ( = Attheyella cryptorum, Brady). The inner branches, which are composed 

 of two nearly equal joints, are of about the same length as the outer three- 

 jointed branches (fig. 14, PI. IV.). The inner branches of the second, third, 

 and fourth pairs consist of a single and more or l|ps rudimentary joint. 

 The fifth pair are one-branched. One ovisac. 



Pontopolites typicus, sp. nov. (PI. VIII. figs. 9-17.) 



Description. — Female. Length, -6 mm. (^nd of an inch). Body elongate, 

 sub-cylindrical. Rostrum short, subtriangular, with the apex bluntly 

 rounded. A minute seta springs from a small notch on each side of the 

 apex. Anterior antennae short, stout, five-jointed, the fourth joint very 

 small. The proportional lengths of the joints are shown by the formula: — 



16 • 12 • 14 - 4 • 15 • 

 1 • 2 ' 3 ' 4 • 5 • 



The small two-jointed secondary branch of the posterior antennae springs 



* TIoptos, the sea ; Uo\iTrjs f a citizen, 



