218 Part III. — Twenty -fifth Annual Report 



The first maxillipeds are elongated, and each is armed with a long and 

 powerful terminal claw having a stout seta at its base nearly as in 

 Nogagus lunatus, Stp. and Ltk. — a species which this form resembles in 

 some other particulars (fig. 12). 



The second maxillipeds are short and very stout, and armed with 

 strong terminal claws as shown in the drawing (fig. 13), 



The first four pairs of thoracic feet are composed of two sub-equal 

 branches, and both branches in each of the first three pairs are distinctly 

 two-jointed. In the first pair the end joints carry three long plumose 

 setae, the end joints of the outer branches being also provided with four 

 spines on the exterior margin (fig. 14). 



The second pair are nearly similar in structure and armature to the 

 second pair in Nogagus latus (fig. 15). 



The third pair also resembles the same pair in that species, but the 

 spines on the exterior edge of the outer branch are rather stronger, and 

 the second joints of both branches are provided with only four elongated 

 though stout terminal setpe (fig. 16). 



The fourth pair are rather small, and the inner branch is bi-articulate ; 

 a seta springs from the inner distal angle of the first joint, and the 

 second carries three terminal setee. The outer branch, which appears to 

 consist of two coalescent joints, with the articulation between them 

 obsolete or nearly so, bears three setse round the inner distal margin, 

 and four spines — three small and one moderately large — on the exterior 

 edge; the setse are all elongated and plumose (fig. 17). 



Habitat. — Taken from a piked dog-fish {Squalus acanthius) captured 

 in the North Sea in 1902. 



Genus Dinemoura, Latreille (1829). 



Dinemoura produda (0. F. Miiller). PI. xv., figs. 18-20 (p). 



This species was recorded in Part III. of the Eighteenth Annual Report 

 of the Fishery Board of Scotland, and I now supplement the previous 

 description by the following additional note : — The antennules, as shown 

 by the drawing (fig. 18), resemble in their armature those of Nogagus latus 

 just described. The first pair of thoracic feet are of a peculiar structure; 

 the inner branch is small, and it and the second basal joint bear a few 

 small rounded wart-like processes. The outer branch has the first joint 

 expanded and gibbous at the proximal end exteriorly, while the distal 

 end is produced so as to extend partly over the small rounded second 

 joint. Both branches are furnished with three marginal or sub-terminal 

 arcuate setaj fig. (19). 



The second pair, which is also slightly distorted, has both branches 

 three-jointed and of about equal length. The drawing (fig. 20) shows 

 the structure and armature of this pair. 



This species has been obtained occasionally on Porbeagle sharks landed 

 at the Aberdeen Fish-market. 



Another species usually found on the Porbeagle shark, viz., Echthro- 

 galeiis coleoptrafus, has also been obtained adhering to the dorsal fin of a 

 piked dog-fish that was captured in the Moray Firth in October, 1900. 

 I do not know of any previous record of Echthrogaleus from this fish. 



