of the Fishery Board for Scotland. 289 



similar to those of the specimens described in the Eleventh Annual 

 Report. The mandibles have a somewhat simple stiucture, the basal joint 

 is stout, but the second is rather slender, and is furnished with a stout 

 and moderately long tooth-like terminal spine ; from near the base of this 

 spine there springs a similar but much smaller spine, as shown by the 

 drawing (tig. 15). (In the description of the species in the Eleventh 

 Annual Keport the appendages doubtfully described and figured as 

 mandibles are really the second maxillipeds, while figure 5 on the plate 

 (pi. V.) represents one of the mandibles instead of one of the maxillje.) 



The maxillae consist of small, one-jointed, and somewhat dilated 

 appendages provided Avith apparently four moderately long plumose 

 setae (fig. 1(5). 



The first maxillipeds (fig. 17) are small and two-jointed, the basal 

 joint is moderately stout, and bears a small spine near the distal end of 

 the inner margin, the end joint has a moderately long claw-like extremity, 

 and is furnish eil with a stout ciliated spine which springs from a notch 

 on the inner aspect, and rather below the middle of the joint. 



Second maxillipeds large, two-jointed ; both joints robust and fur- 

 nished with a few moderately stout, elongated, and coarsely plumose 

 setce ; the end joints are armed with a powerful and strongly curved 

 terminal claw, the convex margin of which is produced slightly beyond 

 the middle, into a spine-like process, and the curve of the claw is 

 distinctly sigmoid, as shewn in the drawing (fig. 18). The thoracic feet 

 are all as described and figured in Part III. of the Eleventh Annual 

 Report already referred to. 



Remarks.— The principal difference between the Bomoloclius from the 

 nostrils of the Ling and Boniolochus solece as described and figured in 

 Part III. of the Eleventh Annual Report, is in the armature of the 

 mandibles ; in Bomolochus solece the terminal spines are both short, but 

 in the form from the nostrils of the Ling the terminal spine is nearly as 

 long as the joint from which it springs, while the secondary spine is 

 small. All the other appendages appear to be much the same in both 

 forms. The specimens from the Ling were somewhat larger than those 

 observed on the Black Soles, and they did not appear to be very common. 

 The fishes were obtained at the Fish Market at Aberdeen. 



Bomolochus onosi, T. Scott, (sp. n.). PI. XIII., figs. 19-22. 



Description of the Female. — Length about 1'3 mm. {-^^ oi an inch). 

 The first body segment is proportionally larger than the same segment 

 in the form just described, being equal to nearly half the entire 

 length of the cephalothorax, but the second and third segments are 

 smaller than the segments similar to them in that form (fig. 19). 



The antennules are moderately stout, but taper gradually towards the 

 distal extremity ; the second joint, which appears to be the largest, is about 

 one and a half times the length of the next one, the third and fourth are 

 sub-equal and larger than those which follow, while the penultimate joint 

 is considerably smaller than any of the others. The plumose set^ with 

 which the antennules are furnished, though somewhat similar to those on 

 the antennules of .Sowio/oc/n/s so/ere, do not appear to be quite so stout 

 (fig. 20). 



The antennas, mandibles, maxillae, and first maxillipeds appear to be 

 similar to the same appendages in the Bomolochus from the nostrils of 

 the Ling, 



The second maxillipeds are stout and armed with a moderately stout 

 and strongly curved claw, but not so powerful as the terminal claw of the 



T 



