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Part III. — Fifteenth Annual Report 



(tig. 11). Antenna?, with secondary branches elongate and slender, three- 

 jointed ; the middle joint very small, the other two sub-equal (fig, 13). 

 Mandibles and other mouth organs somewhat similar to those of Stenhelia 

 hispid^ Brady (tigs. 14, 15). The first pair of swimming feet are 

 moderately stout ; the inner branches, which are rather longer than the 

 outer, have the first joint equal to nearly twice the entire length of the 

 second and third, which are short and sub-equal \ the joints of the outer 

 branches are nearly of equal length, and armed with strong marginal 

 spines j a stout spine springs from both the exterior and interior angles 

 of the second basal joint (fig. 1G). The inner branches of the next 

 three pairs are rather shorter than the outer branches ; in the fourth 

 pair the outer branches are nearly one and a half times longer than 

 the inner branches (fig. 18). The basal joints of the fifth pair are 

 broadly ovate, and produced interiorly so as to extend to near the ex- 

 tremity of the secondary joints ; a short stout seta springs from the dis- 

 tal half of the inner margin of the basal joint, and four setae from the 

 broad and somewhat truncate apex, the two middle setae being considerably 

 longer than the others ; secondary joints sub-quadrangular, and furnished 

 with five setae of variable lengths round the distal end (fig. 19). Caudal 

 stylets short, not half the length of the last abdominal segment; the 

 principal seta of each stylet very stout, and somewhat fusiform (fig. 21). 



Description of the Male. — The male differs from the female in having the 

 antennules modified to form powerful grasping organs (fig. 12). The inner 

 branches of the second pair of feet are, like those of the males of Stenhelia 

 ima, two-jointed, and rather shorter than the outer branches, and are each 

 provided with two stout spine-like terminal appendages (fig. 17). The fifth 

 pair, which are smaller than those of the female, have the basal joint 

 armed interiorly with two stout apical spines ; the secondary joint is pro- 

 vided with two stout spines on the inner margin, — the posterior spine 

 being longer than the other ; two sub-apical spines exteriorly, one short 

 and one of moderate length, and a moderately long apical seta ; three 

 setse also spring from a small foliaceous appendage on the first abdominal 

 segment, and immediately behind the fifth pair of feet (fig. 20). 



Habitat. — Kilbrennan Sound ; not very common. 



Remarks. — This species is somewhat intermediate between Stenhelia 

 liispida and Stenhelia ima. It has the stout build of the first, while the 

 structure of the second feet in the male somewhat resembles those of the 

 male of Stenhelia ima ; but one of the characters which, at a glance, dis- 

 tinguishes this from the other species, is the remarkably stout seta on each 

 of the caudal stylets. 



Cletodes tenuipes, sp. n. (PI. I. figs. 19-27). 



Description of the Female. — Length about "55 mm. ( T ^th of an inch). 

 Somewhat like Cletodes propinqua in general appearance (fig. 19). An- 

 tennule small, five-jointed ; the second and last joints are longer than the 

 others, but the fourth is very small ; the last three joints bear moderately 

 stout setiferous spines (fig. 20). The secondary branches and the an- 

 tennae are rudimentary; they are each reduced to a single seta (fig. 21). 

 Mandibles well developed ; palp small, one-jointed (fig. 22). Posterior 

 foot-jaws moderately stout (rig. 23). * All the swimming feet are slender, 

 especially the inner branches, — those of the fourth pair being almost rudi- 

 mentary. In the first pair the length of the inner branches is equal to 

 about two-thirds the length of the outer branches ; the first joint is very 

 short, but the second is elongate (fig. 24). In the next three pairs the inner 

 branches, which, like those of the first pair, are all two-jointed, are much 

 shorter than the outer branches ; those of the fourth pair are very slender, 



