of the Fishery Board for Scotland. 



127 



of minute spines ; the second joint bears a feathered seta interiorly, and a 

 few small hairs on the exterior edge ; while the end joint, besides being 

 furnished with a few minute spines on the outer margin, bears also a short 

 but moderately stout terminal claw and two slender hairs --the one very 

 short and the other about twice the length of the claw. The outer 

 branches, which are shorter than the first joint of the inner ones, are com- 

 posed of three sub equal joints, the first and second are each armed with 

 a strong dagger-like spine on the outer distal angle, and the second bears 

 also a moderately long seta on its inner distal angle ; the end joint is 

 furnished with four spines on the outer margin and apex, but two of the 

 marginal spines are comparatively small, a slender and slightly bent seta 

 also springs from the inner apical angle, as shown in the drawing 

 (fig. 13). 



The second, third, and fourth pairs have both branches three-jointed, 

 the inner being shorter than the elongated outer branches. The structure 

 and armature of the second and third pairs are not unlike those of the 

 same appendages in D. stromii. In the fourth pair the inner branches 

 scarcely reach beyond the end of the second joints of the outer branches, 

 the first and second joints are each provided with one seta near the distal 

 end of the inner margin, while the third joint bears two marginal and two 

 apical setae ; a small slender spine also springs from near the end of the 

 outer margin. In the second and third pairs of feet the second joint of 

 the inner branches is furnished with two setse on its inner aspect, while the 

 end joint of the second pair carries one marginal and two terminal set*, 

 and a small and slender terminal spine ; but the same joint of the third 

 pair has five marginal and apical setae in addition to the small apical 

 spine. The outer branches of the fourth pair do not differ much in 

 structure and armature from the outer branches of the second and third 

 pairs ; the first and second joints are each provided with a spine on the 

 outer and a plumose seta on the inner distal angles ; the third joint bears 

 two small spines on the outer margin and another on the outer angle of 

 the apex, besides setae on the inner margin and apex, as shown by the 

 drawing (fig. 14). 



The fifth pair, which arc lamelliform, have the inner produced portion 

 of the basal joint broadly sub-cylindrical, with the apex obliquely truncate 

 and armed with five setae, the two inner setae are stout and spiniform, 

 but the other three are more slender ; the two outer setae are close 

 together, but the others are more widely separated ; the secondary joint is 

 also broadly sub-cylindrical, scarcely one and a half times longer than 

 broad and obliquely truncate at the end ; the three outermost are sub- 

 equal, moderately short and stout ; the next two are slender, one being 

 more elongated than the others, while the innermost seta springs from a 

 sub-marginal notch, as shown by the drawing (fig. 15). 



The furcal joints are very short, and the principal tail setae are some- 

 what dilated at the base. This species carries two ovisacs, as shown 

 in the drawing (fig. 16). 



Habitat. — Granton, Firth of Forth (1894). Fishery Board's Hatchery 

 at Bay of Nigg, Aberdeen, November 23rd, 1900. 



Eemarks. — I was at first inclined to ascribe this form to Claus's 

 Dadylopus longirosh'is, but it differs rather markedly in the structure of 

 the fifth feet of the female. Dadylopus tenuiremis, G. S. Brady, also 

 resembles the form just described in its elongated antennules and in one 

 or two other minor details, but it distinctly differs in the proportional 

 lengths of the joints of the outer branches of the first feet and in form of 

 the fifth pair ; and I do not know of any other species with which it can 

 be Mentified. 



