of the Fishery Board for Scotland. 



263 



(fig. 9, PI. XII.). The mandibles are long and slender (fig. 10, PL XII.). 



Figure 10a represents the apical portion of one of the mandibles greatly 

 enlarged, which somewhat resembles the apical portion of the mandibles in 

 Bradypontius magniceps (Brady). The maxilla) resemble very closely 

 those of Dyspontius striatus, Thorell, but the inner lobe is slightly longer 

 than the outer, and the terminal setae appear to be shorter than those of 

 the maxilke of that species (fig. 11, PI. XII.). The first joint of the 

 anterior foot-jaws is large and robust, but the second is elongate and 

 slender, somewhat dilated at the extremity, and armed with a short, 

 stout, and finger-like subapical claw (fig. 12, PI. XII.). The posterior 

 foot-jaws have the first and second joints moderately robust, but the 

 end joints are somewhat slender, and terminate in a short, stout claw, as 

 shown in the figure (fig. 13, PI. XII.) 



In the first pair of swimming feet, which are moderately stout, the 

 outer and inner branches are nearly of equal length. The outer branches 

 are armed exteriorly with short, stout, dagger-like marginal spines, and 

 the interior marginal setae are one on the second and five on the last 

 joint. The inner branches are furnished with one seta on the inner 

 margin of the first joint, and two on the second joint ; while the third 

 joint has five setae on the inner margin and apex, and a small one on the 

 outer margin (fig. 14, PI. XII.). 



In the fourth pair the outer branches are stout and elongate ; the 

 first and second joints have each one marginal seta ; the third joint 

 bears five marginal setae, and is also armed with a moderately large 

 sabre-like terminal spine in addition to the small spines on the outer 

 margin ; the inner branches, which are three-jointed, and scarcely reach 

 to the end of the second joint of the outer branches, are slender, and 

 provided with only a few minute hairs on the margins and two small 

 apical spines (fig. 15, PI. XII.). 



Fifth feet small, one-jointed, subquadrate, each of them furnished with 

 one small marginal and two short apical setae. There is also close to 

 each foot exteriorly a long seta with a slightly dilated base which 

 springs from the edge of the segment to which the fifth feet are attached 

 (fig. 21, PI. XL). 



Habitat. — Firth of Forth. Rare. No males observed. 



Remarks.— As already stated, this specimen was first partly described 

 and figured in the Appendix to the Sixth Annual Report of the Fishery 

 Board for Scotland, published in 1888. It was described under the 

 name of Artotrogus papillatus, but some doubt was expressed as to its 

 being a true Artotrogus. No more specimens having been observed, the 

 interest in the species passed away, and it was practically forgotten. 

 Recently, however, my son got hold of the original specimen from which 

 the species was described, and with the assistance of Dr. W. Giesbrecht's 

 work on the "Diagnosis, Synonymy, and Distribution of the Ascomy- 

 zontidae" made a careful examination of the characters by which the 

 species is distinguished, as well as a series of delineations illustrating its 

 principal appendages. The description given above is the result of this 

 extra research. From the additional information that has been obtained 

 by this re-examination, there can be no doubt that our species is a true 

 Bradypontius. It agrees perfectly with Dr. Giesbrecht's definition of 

 that genus. It may also be identical with the species described by Dr. 

 Giesbrecht under the name of Bradypontius clielifer from the Bay of 

 Naples, and, if so, the distribution of the species will be very considerably 

 extended. 



